feat(filelib-web): 刷新页面时保持树展开、选中节点、tab 与文件夹位置

fix(filelib-web): 文件内容无变化时不提交 commit
feat(filelib): 项目新增修改历史 tab 并隐藏 version hash id
2026-07-27 21:27:09 +08:00 · 2026-07-27 21:21:15 +08:00 · 2026-07-27 21:19:59 +08:00 · 2026-07-27 21:02:02 +08:00 · 2026-07-27 20:53:16 +08:00 · 2026-07-27 20:48:23 +08:00
35 changed files with 2629 additions and 214 deletions
@@ -0,0 +1,157 @@
+# ADR 0030: The File Library VersionStore Is a Real Git Repository per Project
+
+## Status
+
+Accepted.
+
+## Context
+
+The file library (`hub/src/database/filelib/`, an independent subsystem that does
+not reuse the Hub's own `Folder`/`Project` tree from ADR-0021) stores each project
+as a versioned file tree behind the `VersionStore` port (contract C1). Until now
+the only implementation was `createInMemoryVersionStore`: a `Map` of per-file
+version chains, with `VersionId` as a per-repository monotonic counter
+(`v1`, `v2`, …), a hand-written line differ, and an optional JSON snapshot of the
+entire storage root written to `<storageRoot>/.version-store.json` so that a
+process restart did not lose the demo data.
+
+Two things about the surrounding design were already settled in code and are
+confirmed here rather than changed:
+
+- **A `FOLDER` node has no on-disk existence.** `FileLibNode.storageDir` is
+  `NULL` for folders. The tree is `parentId` plus the `pathIds` materialized path;
+  nothing in the filesystem mirrors it.
+- **Projects are flat under one root, keyed by id.** `storageDir` is
+  `<storageRoot>/<nodeId>` where `nodeId` is a `randomUUID()`. Names never enter
+  the path, which is why `renameNode` touches no disk state and does not rewrite
+  descendant paths.
+
+What was never true is the part the names implied. `HUB_FILELIB_STORAGE_ROOT` was
+documented as "the project git repository root" and `fileService` was documented
+as observing a "git first, then audit" ordering, but no code in the repository
+ever invoked git. `versionStore.init(storageDir)` inserted a `Map` entry; the
+directory was never created. Every project's entire content and history lived in
+one process-global JSON file. The header comment and `README.md` both marked this
+as a placeholder awaiting an npm package from the versioning team.
+
+That package has not arrived, and the in-memory store's properties are not
+acceptable for real teacher data: a corrupt or lost `.version-store.json` loses
+every project at once, the whole storage root is rewritten on every commit, and
+`VersionId` values are meaningless outside the process that minted them.
+
+## Decision
+
+**Each file library project is a real Git repository at
+`<storageRoot>/<nodeId>`.** `VersionStore.init` creates the directory and runs
+`git init` there. This is the production implementation;
+`createInMemoryVersionStore` is retained for tests only.
+
+**`VersionId` is a Git commit hash.** The full 40-hex object name, as printed by
+`git rev-parse`. It is no longer a per-repository counter.
+
+**File-level versioning (D16) maps onto commit history as follows.** A write
+touches exactly one path and produces exactly one commit. The version of a file is
+the hash of the most recent commit that modified that path — `git log -1 --
+<path>`. Consequently:
+
+- Two files in one project have independent versions, because a commit that
+  touches `a.md` does not appear in `git log -- b.md`. This preserves the D16
+  property that advancing one file does not invalidate another file's
+  `baseVersion`, even though commits are repository-global objects.
+- `baseVersion` checking (S1/S2) compares the caller's id against the current
+  per-file version. `baseVersion: null` means create, and conflicts if the path
+  already exists at `HEAD`.
+- Reading version `V` of a path means `git show V:<path>`, which is the content as
+  of that commit, not the content the commit introduced to some other file.
+
+**Deletion is a commit, not a tombstone record.** `remove` runs `git rm` and
+commits, so the path is absent from `HEAD` and `list` stops reporting it, while
+`git show <olderVersion>:<path>` still resolves. The in-memory store expressed
+this as a `deleted: true` chain entry; the observable API semantics are the same.
+
+**Git is invoked as a subprocess, not through a library.** `node:child_process`
+`execFile` with an argument array, no new npm dependency. Every invocation is
+hardened, and the hardening is load-bearing rather than incidental:
+
+- `-c core.hooksPath=` and `-c commit.gpgsign=false`, plus
+  `GIT_CONFIG_GLOBAL=/dev/null` and `GIT_CONFIG_SYSTEM=/dev/null`. A project
+  repository is *data*, uploaded by teachers. Without this, a committed
+  `.git/hooks/` entry or a developer's global `gitconfig` would execute or alter
+  server-side behavior.
+- `GIT_LITERAL_PATHSPECS=1` and `--` before every path, so a filename is never
+  reinterpreted as an option or as pathspec magic (`:(glob)`).
+- `GIT_TERMINAL_PROMPT=0`, so a repository never blocks a request waiting on
+  credentials.
+- Author identity is passed per-commit via `GIT_AUTHOR_*`/`GIT_COMMITTER_*`
+  environment variables, never written into the repository's config. The git
+  author name is the acting user's `displayName` (falling back to `userId` when
+  absent), and the email is `<userId>@filelib.paradigm-edu.net`. The email
+  deliberately keys on `userId` rather than the display name, because nicknames
+  change and identity attribution must not drift with them. Characters that would
+  break git's ident line (`<`, `>`, newlines) are stripped from the name.
+- `--git-dir=<projectDir>/.git` and `--work-tree=<projectDir>` are pinned on
+  every invocation, and `GIT_DIR`/`GIT_WORK_TREE`/`GIT_INDEX_FILE`/
+  `GIT_OBJECT_DIRECTORY` are removed from the child environment. Git otherwise
+  searches *upward* for a `.git`, and the storage root is frequently nested inside
+  another repository — the local development default `hub/.filelib-repos` sits
+  inside this very repo. Without pinning, operations on a project directory that
+  has no repository of its own silently retarget the enclosing repository.
+  Existence is therefore tested on the filesystem (`<projectDir>/.git`), not with
+  `git rev-parse --git-dir`, which merely echoes a pinned value back.
+
+**Writes to one repository remain serialized in-process**, as under S4, because
+concurrent git invocations contend on `index.lock`. This is a single-process
+guarantee only; see Consequences.
+
+## Consequences
+
+- `.version-store.json` is not read or migrated by the new store. Existing
+  development data under `HUB_FILELIB_STORAGE_ROOT` does not appear in the git
+  store; those projects report `repo_not_found` until recreated. No production
+  data exists to migrate, since the in-memory store was never production-viable.
+- `VersionId` changes shape in API responses (`GET .../files/*`, history, and the
+  409 `currentVersion` detail). Clients must keep treating it as an opaque
+  string; `filelib-web` already does.
+- `VersionInfo.author` now comes back as the git author name, which is the acting
+  user's display name at commit time (or the `userId` when no display name is
+  known). Commits written without an author carry a fixed `filelib` identity
+  rather than `undefined`. Display names are point-in-time: renaming a user does
+  not rewrite existing commits, and the stable identifier stays in the email.
+- `VersionStore.commit`/`remove` take a structured `CommitAuthor`
+  (`{ userId, displayName? }`) rather than a bare author string, so the port can
+  express both the stable key and the display label. Deletion carries the same
+  identity as any other commit.
+- Serialization is per-process. Two Hub processes sharing a storage root can race
+  on the same repository and surface a git lock error rather than a clean
+  conflict. The alpha Silo deployment (ADR-0025) is one process per organization,
+  so this is not currently reachable; a multi-process deployment needs either a
+  database advisory lock keyed by project id or a single writer.
+- `git` must be present on the host. Absence is a startup-visible failure of
+  project creation (`provision_failed`), not a silent degradation.
+- Repository content is now attacker-influenced data on disk. The path validation
+  in `fileService.validateFilePath` (rejecting `..`, `.git`, absolute paths,
+  control characters) moves from hygiene to a security boundary, and
+  `versionStore` re-checks it rather than trusting callers.
+
+## Alternatives considered
+
+- **`isomorphic-git` or `simple-git`.** Both add a dependency to carry work that
+  three `execFile` calls do. `isomorphic-git` additionally reimplements the object
+  layer, so its bugs would be ours to diagnose.
+- **One commit per repository state, with the repository head as the version.**
+  Simpler mapping, but it breaks D16: any write would invalidate every other
+  file's `baseVersion`, turning independent edits into false conflicts.
+- **Keeping the counter as `VersionId` alongside git.** Requires a durable
+  counter-to-hash mapping outside git, which is the state the decision removes.
+- **Bare repositories with a git index-only write path.** Avoids a working tree,
+  but every read and write becomes plumbing (`hash-object`, `update-index`,
+  `commit-tree`), for no benefit at this scale.
+
+## Deferred
+
+- Cross-process write serialization (advisory lock keyed by project id).
+- Garbage collection and pack maintenance policy for long-lived repositories.
+- Whether export builds (`exportService`) should read a git tree directly instead
+  of going through the `listFiles`/`readFile` port.
+- Recovering `provisionStatus=FAILED` projects by re-running `init`; the status
+  machine records the failure but nothing retries it yet.
@@ -23,12 +23,18 @@ DATABASE_URL="postgresql://paradigm:paradigm@127.0.0.1:5432/paradigm"
 # HUB_AGENT_MAX_TURNS=25
 HUB_AGENT_MAX_CONCURRENT_RUNS="1"
 HUB_AGENT_MAX_RUN_SECONDS="900"
-HUB_HTTP_BODY_LIMIT_BYTES="1048576"
+HUB_HTTP_BODY_LIMIT_BYTES="73400320"
 HUB_MAX_FILES_PER_MESSAGE="8"
 HUB_MAX_FILE_BYTES="26214400"
 HUB_HTTP_REQUESTS_PER_MINUTE="120"
 HUB_FEISHU_EVENTS_PER_MINUTE="120"

+# 文件库单文件上限(缺省 10 MiB)。这两个值是串联的:上传把文件内容放在
+# JSON body 里,二进制过 base64 体积涨 4/3。所以有效上限是
+# min(本值, HUB_HTTP_BODY_LIMIT_BYTES × 3/4);body limit 太小时本值不可达,
+# 且报错是 Fastify 的 413 Payload Too Large 而不是 file_too_large。
+HUB_FILELIB_MAX_FILE_BYTES="52428800"
+
 # Persistent system-managed root for project workspaces. Production must use an
 # absolute path outside the deployment/release tree; install_service.sh defaults
 # to this path and rejects any overlap before installing the unit.
@@ -45,8 +51,18 @@ HUB_SYSTEMD_UNIT="cph-hub-example.service"

 # Absolute path to the `cph` binary (ADR-0016). Production preflight requires
 # the file to be executable and `cph --version` to succeed.
+#
+# Always set this explicitly. `cph` is also the command name of the unrelated
+# PyPI package conda-package-handling, so on any host with miniconda on PATH a
+# bare `cph` resolves to the wrong tool and exports fail with an argparse
+# "invalid choice: 'build'" that gives no hint about the name collision.
 CPH_BIN="/usr/local/bin/cph"

+# The `cph-render` typst package directory (the folder holding lib.typ /
+# typst.toml). Needed by PDF export: when unset, cph falls back to resolving the
+# repo-relative `render/`, which does not exist in a deployed layout.
+CPH_RENDER_DIR="/opt/curriculum-project-hub/render"
+
 # Hub bind address and port. Production defaults to loopback for a local TLS
 # reverse proxy; both values are validated and honored by the HTTP server.
 HOST="127.0.0.1"
@@ -7,6 +7,17 @@
    "": {
      "name": "filelib-web",
      "version": "0.1.0",
+      "dependencies": {
+        "@codemirror/lang-css": "^6.3.1",
+        "@codemirror/lang-html": "^6.4.11",
+        "@codemirror/lang-javascript": "^6.2.5",
+        "@codemirror/lang-json": "^6.0.2",
+        "@codemirror/lang-markdown": "^6.5.1",
+        "@codemirror/language": "^6.12.4",
+        "codemirror": "^6.0.2",
+        "codemirror-lang-typst": "^0.4.0",
+        "vite-plugin-wasm": "^3.6.0"
+      },
      "devDependencies": {
        "@sveltejs/adapter-static": "^3.0.10",
        "@sveltejs/kit": "^2.63.0",
@@ -19,11 +30,161 @@
        "vite": "^8.0.16"
      }
    },
+    "node_modules/@codemirror/autocomplete": {
+      "version": "6.20.3",
+      "resolved": "https://registry.npmjs.org/@codemirror/autocomplete/-/autocomplete-6.20.3.tgz",
+      "integrity": "sha512-tlosUqb+3BbxCxZdu4tKeRghPFC+QM7q4X5YhKV2eCmPG+1r2F3f4AaSz5sCrFqUtX4Jh20VFTKecl16MgiV9g==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/language": "^6.0.0",
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.17.0",
+        "@lezer/common": "^1.0.0"
+      }
+    },
+    "node_modules/@codemirror/commands": {
+      "version": "6.10.4",
+      "resolved": "https://registry.npmjs.org/@codemirror/commands/-/commands-6.10.4.tgz",
+      "integrity": "sha512-Ryk9y9T0FFVF0cUGhAknveAyUOl/A1qReTFi+qPKtOh2Z9F4AUBz3XOrYD4ZEgZirdugVzHvd/2/Wcwy5OliTg==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/language": "^6.0.0",
+        "@codemirror/state": "^6.7.0",
+        "@codemirror/view": "^6.27.0",
+        "@lezer/common": "^1.1.0"
+      }
+    },
+    "node_modules/@codemirror/lang-css": {
+      "version": "6.3.1",
+      "resolved": "https://registry.npmjs.org/@codemirror/lang-css/-/lang-css-6.3.1.tgz",
+      "integrity": "sha512-kr5fwBGiGtmz6l0LSJIbno9QrifNMUusivHbnA1H6Dmqy4HZFte3UAICix1VuKo0lMPKQr2rqB+0BkKi/S3Ejg==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/autocomplete": "^6.0.0",
+        "@codemirror/language": "^6.0.0",
+        "@codemirror/state": "^6.0.0",
+        "@lezer/common": "^1.0.2",
+        "@lezer/css": "^1.1.7"
+      }
+    },
+    "node_modules/@codemirror/lang-html": {
+      "version": "6.4.11",
+      "resolved": "https://registry.npmjs.org/@codemirror/lang-html/-/lang-html-6.4.11.tgz",
+      "integrity": "sha512-9NsXp7Nwp891pQchI7gPdTwBuSuT3K65NGTHWHNJ55HjYcHLllr0rbIZNdOzas9ztc1EUVBlHou85FFZS4BNnw==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/autocomplete": "^6.0.0",
+        "@codemirror/lang-css": "^6.0.0",
+        "@codemirror/lang-javascript": "^6.0.0",
+        "@codemirror/language": "^6.4.0",
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.17.0",
+        "@lezer/common": "^1.0.0",
+        "@lezer/css": "^1.1.0",
+        "@lezer/html": "^1.3.12"
+      }
+    },
+    "node_modules/@codemirror/lang-javascript": {
+      "version": "6.2.5",
+      "resolved": "https://registry.npmjs.org/@codemirror/lang-javascript/-/lang-javascript-6.2.5.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/autocomplete": "^6.0.0",
+        "@codemirror/language": "^6.6.0",
+        "@codemirror/lint": "^6.0.0",
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.17.0",
+        "@lezer/common": "^1.0.0",
+        "@lezer/javascript": "^1.0.0"
+      }
+    },
+    "node_modules/@codemirror/lang-json": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/@codemirror/lang-json/-/lang-json-6.0.2.tgz",
+      "integrity": "sha512-x2OtO+AvwEHrEwR0FyyPtfDUiloG3rnVTSZV1W8UteaLL8/MajQd8DpvUb2YVzC+/T18aSDv0H9mu+xw0EStoQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/language": "^6.0.0",
+        "@lezer/json": "^1.0.0"
+      }
+    },
+    "node_modules/@codemirror/lang-markdown": {
+      "version": "6.5.1",
+      "resolved": "https://registry.npmjs.org/@codemirror/lang-markdown/-/lang-markdown-6.5.1.tgz",
+      "integrity": "sha512-6re5avCNfyRMIoi3XNjbEfQM1vTeVD3JS3g/Fyegyso/eoANFM71Cyvbb66LDyYtQLMEcRFlzioywCqDo9SlLA==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/autocomplete": "^6.7.1",
+        "@codemirror/lang-html": "^6.0.0",
+        "@codemirror/language": "^6.3.0",
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.0.0",
+        "@lezer/common": "^1.2.1",
+        "@lezer/markdown": "^1.0.0"
+      }
+    },
+    "node_modules/@codemirror/language": {
+      "version": "6.12.4",
+      "resolved": "https://registry.npmjs.org/@codemirror/language/-/language-6.12.4.tgz",
+      "integrity": "sha512-1q4PaT+o6PbgpkJt4Q8Fv5XJxTy4FUZ4MWETtyiDw3J0Pyr9E2vqcKL+k9wcvjNTIsauxvE7OfmWj3FRPHQ76A==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.23.0",
+        "@lezer/common": "^1.5.0",
+        "@lezer/highlight": "^1.0.0",
+        "@lezer/lr": "^1.0.0",
+        "style-mod": "^4.0.0"
+      }
+    },
+    "node_modules/@codemirror/lint": {
+      "version": "6.9.7",
+      "resolved": "https://registry.npmjs.org/@codemirror/lint/-/lint-6.9.7.tgz",
+      "integrity": "sha512-28/+iWLYxKxsvGYhSYL7zaCZqLz5+FFFDq9tVsvGv9kv8RY4fFAchJ5WX9M3YrrRlTIsECjsXPqeNgnSmNP2dg==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.42.0",
+        "crelt": "^1.0.5"
+      }
+    },
+    "node_modules/@codemirror/search": {
+      "version": "6.7.1",
+      "resolved": "https://registry.npmjs.org/@codemirror/search/-/search-6.7.1.tgz",
+      "integrity": "sha512-uMe5UO6PamJtSHrXhhHOzSX3ReWtiJrva6GnPMwSOrZtiExb5X5eExhr2OUZQVvdxPsKpY3Ro2mFbQadpPWmHA==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.37.0",
+        "crelt": "^1.0.5"
+      }
+    },
+    "node_modules/@codemirror/state": {
+      "version": "6.7.1",
+      "resolved": "https://registry.npmjs.org/@codemirror/state/-/state-6.7.1.tgz",
+      "integrity": "sha512-9QzNDgE4EYDnAHfrTlR2lwiPciiOymLtwKK+8yHQzCc7GXhAP9xdEbEJFy2IWB1j9UGUl9BsgMmTo/ImA02T7A==",
+      "license": "MIT",
+      "dependencies": {
+        "@marijn/find-cluster-break": "^1.0.0"
+      }
+    },
+    "node_modules/@codemirror/view": {
+      "version": "6.43.6",
+      "resolved": "https://registry.npmjs.org/@codemirror/view/-/view-6.43.6.tgz",
+      "integrity": "sha512-EVunGSYN1wz1p75WY1s3Xg7t3i8Yol0kGZGizNdX9BUFgMFILYVe8/u6EVpo7Ff5PwbZuILb4QAq7IZoKzIEQA==",
+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/state": "^6.7.0",
+        "crelt": "^1.0.6",
+        "style-mod": "^4.1.0",
+        "w3c-keyname": "^2.2.4"
+      }
+    },
    "node_modules/@emnapi/core": {
      "version": "1.11.1",
      "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.11.1.tgz",
      "integrity": "sha512-RSvbQmHzdKzNsLYa/wHrbc3KN4sYLKAdPZxqiM2HATqv/SBk2/ENSHpvXGaLOMcsAyz0poEGqkmmKYG3OWiJEQ==",
-      "dev": true,
      "license": "MIT",
      "optional": true,
      "dependencies": {
@@ -35,7 +196,6 @@
      "version": "1.11.1",
      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.11.1.tgz",
      "integrity": "sha512-vgj7R3y3Wgx24IQaGPA/R6YFXLHVMOZ0uVEyIQPaWs+rd1AzfEMXlAC22FYwO1XkKR6NPsq7mUandH8oIRdZFw==",
-      "dev": true,
      "license": "MIT",
      "optional": true,
      "dependencies": {
@@ -46,7 +206,6 @@
      "version": "1.2.2",
      "resolved": "https://registry.npmjs.org/@emnapi/wasi-threads/-/wasi-threads-1.2.2.tgz",
      "integrity": "sha512-c95qOXkHdydNKhscBTebqEC1CVAZpyqOfVfBzQ1qgzyl3gfeldUjIggDbIZgDKsHLgnsM+igH7TJ/eAasaVuMA==",
-      "dev": true,
      "license": "MIT",
      "optional": true,
      "dependencies": {
@@ -103,11 +262,94 @@
        "@jridgewell/sourcemap-codec": "^1.4.14"
      }
    },
+    "node_modules/@lezer/common": {
+      "version": "1.5.2",
+      "resolved": "https://registry.npmjs.org/@lezer/common/-/common-1.5.2.tgz",
+      "integrity": "sha512-sxQE460fPZyU3sdc8lafxiPwJHBzZRy/udNFynGQky1SePYBdhkBl1kOagA9uT3pxR8K09bOrmTUqA9wb/PjSQ==",
+      "license": "MIT"
+    },
+    "node_modules/@lezer/css": {
+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/@lezer/css/-/css-1.3.4.tgz",
+      "integrity": "sha512-N+tn9tej2hPvyKgHEApMOQfHczDJCwxrRFS3SPn9QjYN+uwHvEDnCgKRrb3mxDYxRS8sKMM8fhC3+lc04Abz5Q==",
+      "license": "MIT",
+      "dependencies": {
+        "@lezer/common": "^1.2.0",
+        "@lezer/highlight": "^1.0.0",
+        "@lezer/lr": "^1.3.0"
+      }
+    },
+    "node_modules/@lezer/highlight": {
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+      "resolved": "https://registry.npmjs.org/@lezer/highlight/-/highlight-1.2.3.tgz",
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+        "@lezer/highlight": "^1.0.0"
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+    "node_modules/@marijn/find-cluster-break": {
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      "optional": true,
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@@ -895,6 +1119,34 @@
        "node": ">=6"
      }
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+    "node_modules/codemirror": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-6.0.2.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "@codemirror/autocomplete": "^6.0.0",
+        "@codemirror/commands": "^6.0.0",
+        "@codemirror/language": "^6.0.0",
+        "@codemirror/lint": "^6.0.0",
+        "@codemirror/search": "^6.0.0",
+        "@codemirror/state": "^6.0.0",
+        "@codemirror/view": "^6.0.0"
+      }
+    },
+    "node_modules/codemirror-lang-typst": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/codemirror-lang-typst/-/codemirror-lang-typst-0.4.0.tgz",
+      "integrity": "sha512-jpHz5qQRC3LE48JH+C24qZJAEAhjqRzWA4MFodPaxriz7UwLVuTLCQ672rdDx9ziObBQ2BvHaRIm5/Upz4KoBQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@codemirror/language": "^6.11.2",
+        "@codemirror/state": "^6.5.2",
+        "@codemirror/view": "^6.38.1",
+        "@lezer/common": "^1.2.3",
+        "@lezer/highlight": "^1.2.1"
+      }
+    },
    "node_modules/cookie": {
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      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.6.0.tgz",
@@ -905,6 +1157,12 @@
        "node": ">= 0.6"
      }
    },
+    "node_modules/crelt": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/crelt/-/crelt-1.0.7.tgz",
+      "integrity": "sha512-aK6BbWfhf4U/wCcLHKPJl/xa6VkVstRaPywWtMKGwuOLc/wZTyQYuoxgvZnNsBvv7Kg3YTBQYYBCggcviQczuA==",
+      "license": "MIT"
+    },
    "node_modules/deepmerge": {
      "version": "4.3.1",
      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.3.1.tgz",
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-      "dev": true,
+      "devOptional": true,
      "license": "MIT",
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@@ -1231,7 +1478,6 @@
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@@ -1255,7 +1501,6 @@
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@@ -1279,7 +1524,6 @@
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-      "dev": true,
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@@ -1388,14 +1630,12 @@
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-      "dev": true,
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@@ -1451,7 +1690,6 @@
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-      "dev": true,
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@@ -1520,12 +1758,17 @@
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-      "dev": true,
      "license": "BSD-3-Clause",
      "engines": {
        "node": ">=0.10.0"
      }
    },
+    "node_modules/style-mod": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/style-mod/-/style-mod-4.1.3.tgz",
+      "integrity": "sha512-i/n8VsZydrugj3Iuzll8+x/00GH2vnYsk1eomD8QiRrSAeW6ItbCQDtfXCeJHd0iwiNagqjQkvpvREEPtW3IoQ==",
+      "license": "MIT"
+    },
    "node_modules/svelte": {
      "version": "5.56.7",
      "resolved": "https://registry.npmjs.org/svelte/-/svelte-5.56.7.tgz",
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@@ -1631,7 +1873,6 @@
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-      "dev": true,
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      "license": "MIT",
      "dependencies": {
        "lightningcss": "^1.32.0",
@@ -1727,6 +1967,15 @@
        }
      }
    },
+    "node_modules/vite-plugin-wasm": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/vite-plugin-wasm/-/vite-plugin-wasm-3.6.0.tgz",
+      "integrity": "sha512-mL/QPziiIA4RAA6DkaZZzOstdwbW5jO4Vz7Zenj0wieKWBlNvIvX5L5ljum9lcUX0ShNfBgCNLKTjNkRVVqcsw==",
+      "license": "MIT",
+      "peerDependencies": {
+        "vite": "^2 || ^3 || ^4 || ^5 || ^6 || ^7 || ^8"
+      }
+    },
    "node_modules/vitefu": {
      "version": "1.1.3",
      "resolved": "https://registry.npmjs.org/vitefu/-/vitefu-1.1.3.tgz",
@@ -1747,6 +1996,12 @@
        }
      }
    },
+    "node_modules/w3c-keyname": {
+      "version": "2.2.8",
+      "resolved": "https://registry.npmjs.org/w3c-keyname/-/w3c-keyname-2.2.8.tgz",
+      "integrity": "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ==",
+      "license": "MIT"
+    },
    "node_modules/zimmerframe": {
      "version": "1.1.4",
      "resolved": "https://registry.npmjs.org/zimmerframe/-/zimmerframe-1.1.4.tgz",
@@ -20,5 +20,16 @@
    "tailwindcss": "^4.3.2",
    "typescript": "^5.7.0",
    "vite": "^8.0.16"
+  },
+  "dependencies": {
+    "@codemirror/lang-css": "^6.3.1",
+    "@codemirror/lang-html": "^6.4.11",
+    "@codemirror/lang-javascript": "^6.2.5",
+    "@codemirror/lang-json": "^6.0.2",
+    "@codemirror/lang-markdown": "^6.5.1",
+    "@codemirror/language": "^6.12.4",
+    "codemirror": "^6.0.2",
+    "codemirror-lang-typst": "^0.4.0",
+    "vite-plugin-wasm": "^3.6.0"
  }
 }
@@ -0,0 +1,121 @@
+<script lang="ts">
+  /**
+   * CodeMirror 6 编辑器封装。自动根据文件扩展名选择语法高亮。
+   * 只在浏览器 mount 后创建 EditorView(CodeMirror 依赖 DOM)。
+   */
+  import { onMount, onDestroy } from "svelte";
+  import { EditorView, basicSetup } from "codemirror";
+  import { EditorState } from "@codemirror/state";
+  import { markdown } from "@codemirror/lang-markdown";
+  import { javascript } from "@codemirror/lang-javascript";
+  import { json } from "@codemirror/lang-json";
+  import { html } from "@codemirror/lang-html";
+  import { css } from "@codemirror/lang-css";
+  import { typst } from "codemirror-lang-typst";
+  import type { Extension } from "@codemirror/state";
+
+  let { value = "", readonly = false, filename = "", onchange }: {
+    value?: string;
+    readonly?: boolean;
+    filename?: string;
+    onchange?: (value: string) => void;
+  } = $props();
+
+  let container = $state<HTMLDivElement | null>(null);
+  let view: EditorView | null = null;
+
+  /** 根据文件名后缀选语言扩展 */
+  function langExtension(name: string): Extension[] {
+    const ext = name.split(".").pop()?.toLowerCase() ?? "";
+    switch (ext) {
+      case "md":
+      case "markdown":
+        return [markdown()];
+      case "js":
+      case "mjs":
+      case "cjs":
+        return [javascript()];
+      case "ts":
+      case "mts":
+      case "cts":
+        return [javascript({ typescript: true })];
+      case "jsx":
+        return [javascript({ jsx: true })];
+      case "tsx":
+        return [javascript({ jsx: true, typescript: true })];
+      case "json":
+      case "jsonc":
+        return [json()];
+      case "html":
+      case "htm":
+      case "svelte":
+      case "vue":
+        return [html()];
+      case "css":
+      case "scss":
+        return [css()];
+      case "typ":
+      case "typst":
+        return [typst()];
+      default:
+        return [];
+    }
+  }
+
+  onMount(() => {
+    if (!container) return;
+    const extensions: Extension[] = [
+      basicSetup,
+      ...langExtension(filename),
+      EditorView.lineWrapping,
+      EditorView.updateListener.of((update) => {
+        if (update.docChanged) {
+          onchange?.(update.state.doc.toString());
+        }
+      }),
+    ];
+    if (readonly) extensions.push(EditorState.readOnly.of(true));
+
+    view = new EditorView({
+      state: EditorState.create({ doc: value, extensions }),
+      parent: container,
+    });
+  });
+
+  onDestroy(() => {
+    view?.destroy();
+    view = null;
+  });
+
+  // 外部 value 变化时(如冲突载入最新),替换编辑器内容。
+  $effect(() => {
+    if (view && view.state.doc.toString() !== value) {
+      view.dispatch({
+        changes: { from: 0, to: view.state.doc.length, insert: value },
+      });
+    }
+  });
+</script>
+
+<div bind:this={container} class="code-editor-wrapper"></div>
+
+<style>
+  .code-editor-wrapper {
+    border: 1px solid var(--color-line);
+    border-radius: 8px;
+    overflow: hidden;
+    font-size: 13px;
+    line-height: 1.65;
+  }
+  .code-editor-wrapper :global(.cm-editor) {
+    height: 100%;
+    max-height: 60vh;
+    overflow: auto;
+  }
+  .code-editor-wrapper :global(.cm-editor.cm-focused) {
+    outline: none;
+  }
+  .code-editor-wrapper :global(.cm-scroller) {
+    overflow: auto;
+  }
+</style>
@@ -1,11 +1,22 @@
 <script lang="ts">
+  /**
+   * 文件编辑器(模态框形式)。打开后加载文件内容并使用 CodeMirror 编辑,
+   * 支持语法高亮、版本冲突处理、历史查看与删除。
+   */
  import { api, ApiError } from "./api.js";
  import { toastOk, toastErr, toast } from "./stores.js";
  import type { FileContent, VersionInfo, Role } from "./types.js";
  import Modal from "./Modal.svelte";
  import Icon from "./Icon.svelte";
+  import CodeEditor from "./CodeEditor.svelte";

-  let { projectId, path, role, onchanged, onclose }: { projectId: string; path: string; role: Role; onchanged: () => void; onclose?: () => void } = $props();
+  let { projectId, path, role, onchanged, onclose }: {
+    projectId: string;
+    path: string;
+    role: Role;
+    onchanged: () => void;
+    onclose: () => void;
+  } = $props();

  let file = $state<FileContent | null>(null);
  let draft = $state("");
@@ -15,6 +26,7 @@
  let history = $state<VersionInfo[]>([]);

  const canEdit = $derived(role !== "VIEW");
+  const filename = $derived(path.split("/").pop() ?? "");

  async function load(): Promise<void> {
    try {
@@ -35,6 +47,11 @@

  async function save(): Promise<void> {
    if (file === null) return;
+    // 内容未变化时不提交,避免产生空 commit。
+    if (draft === file.content) {
+      toastOk("内容无变化,未提交");
+      return;
+    }
    try {
      const r = await api<{ version: string }>(`/database/api/projects/${projectId}/file/commits`, {
        method: "POST",
@@ -81,6 +98,7 @@
      toastOk("已删除");
      file = null;
      onchanged();
+      onclose();
    } catch (e) {
      toastErr(e instanceof Error ? e.message : String(e));
    }
@@ -104,58 +122,80 @@
  }
 </script>

-{#if loadError}
-  <div class="panel text-xs text-danger">{loadError}</div>
-{:else if file}
-  <div class="panel">
-    <div class="mb-2.5 flex items-center justify-between">
-      <span class="file-meta">{file.path} @ {file.version}</span>
+<!-- 主编辑器模态框:宽屏 overlay -->
+<div
+  class="fixed inset-0 z-40 flex items-center justify-center bg-black/30 p-4"
+  role="presentation"
+  onclick={(e) => { if (e.target === e.currentTarget) onclose(); }}
+>
+  <div class="flex h-[85vh] w-full max-w-[900px] flex-col rounded-2xl border border-line-soft bg-panel shadow-[0_4px_20px_rgba(26,26,24,.07)]">
+    <!-- 顶栏 -->
+    <div class="flex shrink-0 items-center justify-between border-b border-line-soft px-6 py-4">
+      <div class="flex min-w-0 items-center gap-3">
+        <span class="text-[15px] font-semibold text-ink truncate">{filename}</span>
+      </div>
      <div class="flex items-center gap-1.5">
-        <a class="btn" href="/database/api/projects/{projectId}/file/raw?path={encodeURIComponent(file.path)}" download>下载</a>
-        <button class="btn" onclick={openHistory}><Icon name="clock" size={13} /> 历史</button>
-        {#if canEdit}
-          <button class="btn btn-danger" onclick={remove}><Icon name="trash" size={13} /> 删除文件</button>
-        {/if}
-        {#if onclose}
-          <button class="btn !px-2.5" onclick={onclose} title="关闭预览" aria-label="关闭预览">✕</button>
+        {#if file}
+          <a class="btn" href="/database/api/projects/{projectId}/file/raw?path={encodeURIComponent(file.path)}" download>
+            <Icon name="download" size={13} /> 下载
+          </a>
+          <button class="btn" onclick={openHistory}><Icon name="clock" size={13} /> 历史</button>
+          {#if canEdit}
+            <button class="btn btn-danger" onclick={remove}><Icon name="trash" size={13} /> 删除</button>
+          {/if}
        {/if}
+        <button class="btn !px-2.5" onclick={onclose} title="关闭" aria-label="关闭编辑器">✕</button>
      </div>
    </div>

-    {#if file.encoding === "base64"}
-      <div class="quiet">二进制文件({file.size} B),不支持在线编辑</div>
-    {:else}
-      <textarea rows="14" class="textarea !leading-7" bind:value={draft} readonly={!canEdit}></textarea>
-    {/if}
+    <!-- 编辑器主体 -->
+    <div class="flex-1 overflow-y-auto px-6 py-4">
+      {#if loadError}
+        <div class="text-xs text-danger">{loadError}</div>
+      {:else if file === null}
+        <div class="quiet">加载中…</div>
+      {:else if file.encoding === "base64"}
+        <div class="quiet">二进制文件({file.size} B),不支持在线编辑</div>
+      {:else}
+        <CodeEditor value={draft} filename={path} readonly={!canEdit} onchange={(v) => (draft = v)} />
+      {/if}

-    {#if canEdit && file.encoding !== "base64"}
-      <div class="mt-3 flex justify-end">
+      {#if conflict}
+        <div class="mt-4 rounded-xl border border-[#E8E2C8] bg-[#FCFBF4] p-4">
+          <div class="mb-2 text-[13px] font-semibold text-[#6E6329]">冲突:他人已提交 {conflict.currentVersion},差异如下</div>
+          <pre class="diff rounded-lg border border-line-soft bg-panel p-3">{@html renderDiff(conflict.diff)}</pre>
+          <div class="mt-2 text-[11.5px] text-[#8A8059]">请人工合并后重新提交(基版已更新为 {conflict.currentVersion})</div>
+          <div class="mt-2 flex justify-end">
+            <button class="btn" onclick={acceptLatest}>载入最新内容</button>
+          </div>
+        </div>
+      {/if}
+    </div>
+
+    <!-- 底栏 -->
+    {#if canEdit && file && file.encoding !== "base64"}
+      <div class="flex shrink-0 justify-end border-t border-line-soft px-6 py-3">
        <button class="btn btn-primary" onclick={save}>提交修改</button>
      </div>
    {/if}
-
-    {#if conflict}
-      <div class="mt-3.5 rounded-xl border border-[#E8E2C8] bg-[#FCFBF4] p-4">
-        <div class="mb-2 text-[13px] font-semibold text-[#6E6329]">冲突:他人已提交 {conflict.currentVersion},差异如下(你的基版 → 最新版)</div>
-        <pre class="diff rounded-lg border border-line-soft bg-panel p-3">{@html renderDiff(conflict.diff)}</pre>
-        <div class="mt-2 text-[11.5px] text-[#8A8059]">请人工合并后,以最新内容为全文重新提交(基版将更新为 {conflict.currentVersion})</div>
-        <div class="mt-2 flex justify-end">
-          <button class="btn" onclick={acceptLatest}>载入最新内容</button>
-        </div>
-      </div>
-    {/if}
  </div>
-{:else}
-  <div class="panel quiet">加载中…</div>
-{/if}
+</div>

 {#if showHistory}
  <Modal title="版本历史" onclose={() => (showHistory = false)}>
    <div class="max-h-80 overflow-y-auto">
      {#each history as v (v.version)}
-        <div class="border-t border-line-soft py-2 text-xs first:border-t-0">
-          <span class="font-mono text-accent">{v.version}</span> {v.message}
-          <div class="text-ink-3">{new Date(v.committedAt).toLocaleString("zh-CN")}{v.author ? " · " + v.author : ""}</div>
+        <div class="flex items-center gap-2.5 border-t border-line-soft py-2.5 first:border-t-0">
+          <span
+            class="inline-flex h-6 w-6 shrink-0 items-center justify-center rounded-full bg-accent text-[11px] font-semibold text-white"
+            aria-hidden="true"
+          >{(v.author ?? "?").slice(0, 1).toUpperCase()}</span>
+          <div class="min-w-0 flex-1">
+            <p class="text-[12.5px] text-ink">{v.message}</p>
+            <p class="text-[11px] text-ink-3">
+              {#if v.author}<span>{v.author}</span> · {/if}{new Date(v.committedAt).toLocaleString("zh-CN")}
+            </p>
+          </div>
        </div>
      {/each}
    </div>
@@ -2,6 +2,7 @@
  import { api } from "./api.js";
  import { toastOk, toastErr } from "./stores.js";
  import { selectedFilePath, filesVersion } from "./browser.js";
+  import { loadConfig } from "./config.js";
  import type { FileEntry, NodeDetail } from "./types.js";
  import Modal from "./Modal.svelte";
  import Icon from "./Icon.svelte";
@@ -13,11 +14,56 @@
  let showNewFile = $state(false);
  let newPath = $state("");
  let newContent = $state("");
+  let newMessage = $state("");
+  // 上传弹窗:选完文件先暂存,等用户确认路径与 commit 信息再传。
+  let pendingFile = $state<File | null>(null);
+  let uploadPath = $state("");
+  let uploadMessage = $state("");
+  let uploading = $state(false);
  // bind:this 的目标要用 $state,否则 svelte 5 warn 不会正确更新。
  let uploadInput = $state<HTMLInputElement | null>(null);
+  /** 上传上限由 /database/config 下发(后端 HUB_FILELIB_MAX_FILE_BYTES)。 */
+  let maxFileBytes = $state<number | null>(null);
+
+  const maxLabel = $derived(
+    maxFileBytes === null ? "" : `${(maxFileBytes / 1024 / 1024).toFixed(maxFileBytes % (1024 * 1024) === 0 ? 0 : 1)}MB`,
+  );

  const canEdit = $derived(node.role !== "VIEW");

+  /**
+   * 当前浏览目录("" = 根,否则以 "/" 结尾)。文件夹是从扁平 path 列表派生的
+   * 虚拟层(ADR-0030 —— git 版本存储里只有文件,没有目录对象),不对应任何
+   * 独立的后端资源,纯前端按 "/" 分段分组即可,无需新增接口。
+   */
+  let currentDir = $state("");
+  let viewMode = $state<"list" | "grid">(loadViewMode());
+
+  function restoreCurrentDir(nodeId: string): string {
+    try {
+      return sessionStorage.getItem(`filelib.dir.${nodeId}`) ?? "";
+    } catch {
+      return "";
+    }
+  }
+
+  function loadViewMode(): "list" | "grid" {
+    try {
+      return localStorage.getItem("filelib.viewMode") === "grid" ? "grid" : "list";
+    } catch {
+      return "list";
+    }
+  }
+
+  function setViewMode(mode: "list" | "grid"): void {
+    viewMode = mode;
+    try {
+      localStorage.setItem("filelib.viewMode", mode);
+    } catch {
+      // 隐私模式等场景下 localStorage 可能不可用;视图切换仍在当前会话内生效,只是不跨会话记忆。
+    }
+  }
+
  async function loadFiles(): Promise<void> {
    try {
      const r = await api<{ files: FileEntry[] }>(`/database/api/projects/${node.id}/files`);
@@ -34,17 +80,86 @@
    void loadFiles();
  });

+  // 切换项目时恢复对应项目的目录位置。
+  $effect(() => {
+    void node.id;
+    currentDir = restoreCurrentDir(node.id);
+  });
+
+  // currentDir 变化时持久化。
+  $effect(() => {
+    try {
+      sessionStorage.setItem(`filelib.dir.${node.id}`, currentDir);
+    } catch { /* ignore */ }
+  });
+
+  $effect(() => {
+    void loadConfig()
+      .then((c) => (maxFileBytes = c.maxFileBytes))
+      .catch(() => (maxFileBytes = null));
+  });
+
+  interface FolderRow {
+    readonly kind: "folder";
+    readonly name: string;
+    readonly path: string;
+  }
+  interface FileRow {
+    readonly kind: "file";
+    readonly name: string;
+    readonly path: string;
+    readonly size: number;
+  }
+
+  /** 按当前目录分组:落在 currentDir 前缀下、第一段之后还有 "/" 的算子文件夹,否则是本层文件。 */
+  const rows = $derived.by((): { folders: FolderRow[]; files: FileRow[] } | null => {
+    if (files === null) return null;
+    const folderNames = new Set<string>();
+    const fileRows: FileRow[] = [];
+    for (const f of files) {
+      if (!f.path.startsWith(currentDir)) continue;
+      const rest = f.path.slice(currentDir.length);
+      const slash = rest.indexOf("/");
+      if (slash === -1) fileRows.push({ kind: "file", name: rest, path: f.path, size: f.size });
+      else folderNames.add(rest.slice(0, slash));
+    }
+    const folders = [...folderNames]
+      .sort((a, b) => a.localeCompare(b))
+      .map((name): FolderRow => ({ kind: "folder", name, path: `${currentDir}${name}/` }));
+    fileRows.sort((a, b) => a.name.localeCompare(b.name));
+    return { folders, files: fileRows };
+  });
+
+  const breadcrumbSegs = $derived(currentDir === "" ? [] : currentDir.slice(0, -1).split("/"));
+
+  function enterFolder(path: string): void {
+    currentDir = path;
+  }
+
+  function goUp(): void {
+    if (currentDir === "") return;
+    const segs = currentDir.slice(0, -1).split("/");
+    segs.pop();
+    currentDir = segs.length === 0 ? "" : `${segs.join("/")}/`;
+  }
+
+  function gotoBreadcrumb(index: number): void {
+    currentDir = index < 0 ? "" : `${breadcrumbSegs.slice(0, index + 1).join("/")}/`;
+  }
+
  async function submitNewFile(): Promise<void> {
    const path = newPath.trim();
    if (path === "") return;
+    const message = newMessage.trim();
    try {
      await api(`/database/api/projects/${node.id}/file`, {
        method: "PUT",
-        body: { path, content: newContent },
+        // message 缺失时不传 —— 后端回退到【用户名】修改了【路径】。
+        body: message === "" ? { path, content: newContent } : { path, content: newContent, message },
      });
      toastOk("已创建");
      showNewFile = false;
-      newPath = ""; newContent = "";
+      newPath = ""; newContent = ""; newMessage = "";
      await loadFiles();
    } catch (e) {
      toastErr(e instanceof Error ? e.message : String(e));
@@ -60,28 +175,51 @@
    return btoa(bin);
  }

-  async function doUpload(e: Event): Promise<void> {
+  /** 选文件只负责暂存与预填;真正上传在弹窗确认后。 */
+  function pickFile(e: Event): void {
    const input = e.target as HTMLInputElement;
    const file = input.files?.[0];
    input.value = "";
    if (!file) return;
-    if (file.size > 10 * 1024 * 1024) {
-      toastErr("文件超过 10MB 上限");
+    // 上限取后端值;拉不到就不在前端拦 —— 后端横竖会以 413 file_too_large 兼底,
+    // 前端这道只是省一次往返。
+    if (maxFileBytes !== null && file.size > maxFileBytes) {
+      toastErr(`文件超过 ${maxLabel} 上限`);
      return;
    }
-    const targetPath = prompt("保存到路径(可含目录):", "材料/" + file.name);
-    if (!targetPath) return;
-    const bytes = new Uint8Array(await file.arrayBuffer());
-    const isBinary = bytes.includes(0);
-    const body = isBinary
-      ? { path: targetPath, content: u8ToBase64(bytes), encoding: "base64" }
-      : { path: targetPath, content: new TextDecoder("utf-8").decode(bytes), encoding: "utf8" };
+    pendingFile = file;
+    uploadPath = `${currentDir}${file.name}`;
+    uploadMessage = "";
+  }
+
+  function cancelUpload(): void {
+    pendingFile = null;
+    uploadPath = "";
+    uploadMessage = "";
+  }
+
+  async function submitUpload(): Promise<void> {
+    const file = pendingFile;
+    const targetPath = uploadPath.trim();
+    if (file === null || targetPath === "") return;
+    uploading = true;
    try {
+      const bytes = new Uint8Array(await file.arrayBuffer());
+      const isBinary = bytes.includes(0);
+      const message = uploadMessage.trim();
+      const body: Record<string, string> = isBinary
+        ? { path: targetPath, content: u8ToBase64(bytes), encoding: "base64" }
+        : { path: targetPath, content: new TextDecoder("utf-8").decode(bytes), encoding: "utf8" };
+      // message 缺失时不传 —— 后端回退到【用户名】修改了【路径】。
+      if (message !== "") body["message"] = message;
      await api(`/database/api/projects/${node.id}/file`, { method: "PUT", body });
-      toastOk("已上传 " + file.name);
+      toastOk(`已上传 ${file.name}`);
+      cancelUpload();
      await loadFiles();
    } catch (err) {
      toastErr(err instanceof Error ? err.message : String(err));
+    } finally {
+      uploading = false;
    }
  }
 </script>
@@ -91,9 +229,9 @@
    <div class="section-title">项目文件({files?.length ?? 0})</div>
    {#if canEdit}
      <div class="flex gap-1.5">
-        <button class="btn" onclick={() => (showNewFile = true)}><Icon name="plus" size={13} /> 新建文件</button>
+        <button class="btn" onclick={() => { newPath = currentDir; showNewFile = true; }}><Icon name="plus" size={13} /> 新建文件</button>
        <button class="btn btn-primary" onclick={() => uploadInput?.click()}>上传文件</button>
-        <input bind:this={uploadInput} type="file" class="hidden" onchange={doUpload} />
+        <input bind:this={uploadInput} type="file" class="hidden" onchange={pickFile} />
      </div>
    {/if}
  </div>
@@ -104,20 +242,91 @@
    <div class="py-5 text-center text-xs text-danger">{loadError}</div>
  {:else if files && files.length === 0}
    <div class="quiet py-5 text-center">空仓库 · 可新建或上传文件</div>
-  {:else if files}
-    <table class="list">
-      <tbody>
-        {#each files as f (f.path)}
-          <tr
-            class="cursor-pointer {$selectedFilePath === f.path ? 'bg-selected' : 'hover:bg-hover'}"
+  {:else if rows}
+    <!-- 地址栏:上级 + 面包屑,与视图切换同一行,windows 资源管理器的标准布局 -->
+    <div class="mb-2 flex items-center justify-between gap-2 border-b border-line-soft pb-2">
+      <div class="flex min-w-0 items-center gap-0.5 overflow-x-auto text-[12.5px] text-ink-3">
+        <button
+          class="mr-0.5 flex h-6 w-6 shrink-0 items-center justify-center rounded-md text-ink-3 disabled:opacity-30 {currentDir !== '' ? 'hover:bg-hover hover:text-ink' : ''}"
+          onclick={goUp}
+          disabled={currentDir === ""}
+          title="返回上级"
+          aria-label="返回上级"
+        ><Icon name="arrowUp" size={13} /></button>
+        <button class="shrink-0 rounded-md px-1.5 py-0.5 hover:bg-hover hover:text-ink" onclick={() => gotoBreadcrumb(-1)}>根目录</button>
+        {#each breadcrumbSegs as seg, i (i)}
+          <span class="shrink-0 text-line">/</span>
+          <button class="shrink-0 truncate rounded-md px-1.5 py-0.5 hover:bg-hover hover:text-ink" onclick={() => gotoBreadcrumb(i)}>{seg}</button>
+        {/each}
+      </div>
+      <div class="flex shrink-0 gap-1">
+        <button
+          class="flex h-[26px] w-[26px] items-center justify-center rounded-md {viewMode === 'list' ? 'bg-selected text-ink' : 'text-ink-3 hover:bg-hover hover:text-ink'}"
+          onclick={() => setViewMode("list")}
+          title="列表视图"
+          aria-label="列表视图"
+          aria-pressed={viewMode === "list"}
+        ><Icon name="viewList" size={14} /></button>
+        <button
+          class="flex h-[26px] w-[26px] items-center justify-center rounded-md {viewMode === 'grid' ? 'bg-selected text-ink' : 'text-ink-3 hover:bg-hover hover:text-ink'}"
+          onclick={() => setViewMode("grid")}
+          title="大图标视图"
+          aria-label="大图标视图"
+          aria-pressed={viewMode === "grid"}
+        ><Icon name="viewGrid" size={14} /></button>
+      </div>
+    </div>
+
+    {#if rows.folders.length === 0 && rows.files.length === 0}
+      <div class="quiet py-5 text-center">此文件夹为空</div>
+    {:else if viewMode === "list"}
+      <table class="list">
+        <tbody>
+          {#each rows.folders as folder (folder.path)}
+            <tr
+              class="cursor-pointer hover:bg-hover"
+              role="button"
+              tabindex="0"
+              onclick={() => enterFolder(folder.path)}
+              onkeydown={(e) => e.key === "Enter" && enterFolder(folder.path)}
+            >
+              <td><span class="inline-flex items-center gap-2 text-[12.5px] text-ink"><span class="text-ink-3"><Icon name="folder" size={15} /></span>{folder.name}</span></td>
+              <td class="file-meta text-right">—</td>
+            </tr>
+          {/each}
+          {#each rows.files as f (f.path)}
+            <tr
+              class="cursor-pointer {$selectedFilePath === f.path ? 'bg-selected' : 'hover:bg-hover'}"
+              onclick={() => selectedFilePath.set(f.path)}
+            >
+              <td><span class="inline-flex items-center gap-2 font-mono text-[12.5px] text-ink"><span class="text-ink-3"><Icon name="file" size={14} /></span>{f.name}</span></td>
+              <td class="file-meta text-right">{f.size} B</td>
+            </tr>
+          {/each}
+        </tbody>
+      </table>
+    {:else}
+      <div class="grid grid-cols-[repeat(auto-fill,minmax(84px,1fr))] gap-1 py-1">
+        {#each rows.folders as folder (folder.path)}
+          <button
+            class="flex flex-col items-center gap-1.5 rounded-lg p-2.5 text-center hover:bg-hover"
+            onclick={() => enterFolder(folder.path)}
+          >
+            <span class="text-ink-3"><Icon name="folder" size={34} /></span>
+            <span class="line-clamp-2 w-full break-all text-[11.5px] text-ink">{folder.name}</span>
+          </button>
+        {/each}
+        {#each rows.files as f (f.path)}
+          <button
+            class="flex flex-col items-center gap-1.5 rounded-lg p-2.5 text-center {$selectedFilePath === f.path ? 'bg-selected' : 'hover:bg-hover'}"
            onclick={() => selectedFilePath.set(f.path)}
          >
-            <td class="font-mono text-[12.5px] text-ink">{f.path}</td>
-            <td class="file-meta text-right">{f.size} B</td>
-          </tr>
+            <span class="text-ink-3"><Icon name="file" size={34} /></span>
+            <span class="line-clamp-2 w-full break-all text-[11.5px] text-ink">{f.name}</span>
+          </button>
        {/each}
-      </tbody>
-    </table>
+      </div>
+    {/if}
  {/if}
 </div>

@@ -131,9 +340,36 @@
      <label class="form-label" for="nf-content">内容</label>
      <textarea id="nf-content" rows="8" class="textarea" bind:value={newContent} placeholder="内容…"></textarea>
    </div>
+    <div class="form-row">
+      <label class="form-label" for="nf-msg">提交信息(可选)</label>
+      <input id="nf-msg" class="input" bind:value={newMessage} placeholder="留空则自动生成" />
+    </div>
    <div class="mt-4 flex justify-end gap-2">
      <button class="btn" onclick={() => (showNewFile = false)}>取消</button>
      <button class="btn btn-primary" onclick={submitNewFile}>创建</button>
    </div>
  </Modal>
 {/if}
+
+{#if pendingFile}
+  <Modal title="上传文件" onclose={cancelUpload}>
+    <div class="form-row">
+      <span class="form-label">已选文件</span>
+      <p class="font-mono text-[12.5px] text-ink">{pendingFile.name}<span class="quiet"> · {pendingFile.size} B</span></p>
+    </div>
+    <div class="form-row">
+      <label class="form-label" for="up-path">保存到路径</label>
+      <input id="up-path" class="input font-mono" bind:value={uploadPath} placeholder="材料/课件.pptx" />
+    </div>
+    <div class="form-row">
+      <label class="form-label" for="up-msg">提交信息(可选)</label>
+      <input id="up-msg" class="input" bind:value={uploadMessage} placeholder="留空则自动生成" />
+    </div>
+    <div class="mt-4 flex justify-end gap-2">
+      <button class="btn" onclick={cancelUpload} disabled={uploading}>取消</button>
+      <button class="btn btn-primary" onclick={submitUpload} disabled={uploading || uploadPath.trim() === ""}>
+        {uploading ? "上传中…" : "上传"}
+      </button>
+    </div>
+  </Modal>
+{/if}
@@ -84,7 +84,7 @@
  }

  async function revoke(g: Grant): Promise<void> {
-    if (!confirm(`收回「${g.principalId}」的 ${g.role} 授权?`)) return;
+    if (!confirm(`收回「${g.principalName}」的 ${g.role} 授权?`)) return;
    try {
      await api(`/database/api/nodes/${node.id}/grants/${encodeURIComponent(g.id)}`, {
        method: "DELETE",
@@ -133,7 +133,8 @@
              <td>
                <span class="inline-flex items-center gap-2">
                  <span class="flex text-ink-3"><Icon name={g.principalType === "USER" ? "user" : "group"} size={14} /></span>
-                  <span class="font-mono text-[12px]">{g.principalId}</span>
+                  <!-- 展示名优先(后端已解析);id 作为 title 供排查。 -->
+                  <span class="font-medium" title={g.principalId}>{g.principalName}</span>
                  {#if g.isCreatorGrant}<span class="quiet">(创建者)</span>{/if}
                </span>
              </td>
@@ -0,0 +1,113 @@
+<script lang="ts">
+  /**
+   * 项目修改历史 tab:展示所有文件的提交记录(新→旧)。
+   * 默认只显示 commit message + 作者头像 + 时间,点击可展开查看修改的文件。
+   */
+  import { api } from "./api.js";
+  import { toastErr } from "./stores.js";
+  import type { ProjectCommitInfo, NodeDetail } from "./types.js";
+  import Icon from "./Icon.svelte";
+
+  let { node }: { node: NodeDetail } = $props();
+
+  let history = $state<ProjectCommitInfo[] | null>(null);
+  let loadError = $state<string | null>(null);
+  let limit = $state(50);
+  let expanded = $state<Set<string>>(new Set());
+
+  async function loadHistory(): Promise<void> {
+    try {
+      const r = await api<{ history: ProjectCommitInfo[] }>(
+        `/database/api/projects/${node.id}/history?limit=${limit}`,
+      );
+      history = r.history;
+      loadError = null;
+    } catch (e) {
+      loadError = e instanceof Error ? e.message : String(e);
+    }
+  }
+
+  $effect(() => {
+    void node.id;
+    void loadHistory();
+  });
+
+  function toggle(version: string): void {
+    const next = new Set(expanded);
+    if (next.has(version)) next.delete(version);
+    else next.add(version);
+    expanded = next;
+  }
+
+  function loadMore(): void {
+    limit += 50;
+    void loadHistory();
+  }
+
+  function authorInitial(author: string | undefined): string {
+    return (author ?? "?").slice(0, 1).toUpperCase();
+  }
+</script>
+
+<div class="panel">
+  <div class="mb-3 section-title">修改历史</div>
+
+  {#if history === null && loadError === null}
+    <div class="quiet py-5 text-center">加载中…</div>
+  {:else if loadError}
+    <div class="py-5 text-center text-xs text-danger">{loadError}</div>
+  {:else if history && history.length === 0}
+    <div class="quiet py-5 text-center">暂无提交记录</div>
+  {:else if history}
+    <div>
+      {#each history as commit (commit.version)}
+        {@const isOpen = expanded.has(commit.version)}
+        <div class="border-t border-line-soft first:border-t-0">
+          <button
+            class="flex w-full items-center gap-2.5 py-3 text-left transition hover:bg-hover rounded-md px-1.5 -mx-1.5"
+            onclick={() => toggle(commit.version)}
+            aria-expanded={isOpen}
+          >
+            <!-- 头像 -->
+            <span
+              class="inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-accent text-[12px] font-semibold text-white"
+              aria-hidden="true"
+            >{authorInitial(commit.author)}</span>
+            <!-- 消息与时间 -->
+            <div class="min-w-0 flex-1">
+              <p class="text-[13px] text-ink">{commit.message}</p>
+              <p class="mt-0.5 text-[11.5px] text-ink-3">
+                {#if commit.author}<span>{commit.author}</span> · {/if}{new Date(commit.committedAt).toLocaleString("zh-CN")}
+              </p>
+            </div>
+            <!-- 展开指示 -->
+            <span class="shrink-0 text-ink-3 transition {isOpen ? 'rotate-90' : ''}">
+              <Icon name="chevron" size={12} />
+            </span>
+          </button>
+
+          {#if isOpen}
+            <div class="pb-3 pl-[46px]">
+              <div class="flex flex-wrap gap-1">
+                {#each commit.files as filePath (filePath)}
+                  <span class="inline-flex items-center gap-1 rounded-md bg-hover px-1.5 py-0.5 font-mono text-[11px] text-ink-2">
+                    <Icon name="file" size={10} />{filePath}
+                  </span>
+                {/each}
+                {#if commit.files.length === 0}
+                  <span class="text-[11.5px] text-ink-3">无文件变更信息</span>
+                {/if}
+              </div>
+            </div>
+          {/if}
+        </div>
+      {/each}
+    </div>
+
+    {#if history.length >= limit}
+      <div class="mt-3 flex justify-center">
+        <button class="btn" onclick={loadMore}>加载更多</button>
+      </div>
+    {/if}
+  {/if}
+</div>
@@ -19,6 +19,13 @@
    // 已归档(软删)标记用;与"删除"区分 —— 数据仍在,只是打了 archivedAt。
    archive: "M3 8h18v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8Zm1-5h16l1 5H3l1-5Zm5 9h6",
    restore: "M3 12a9 9 0 1 0 3-6.7M3 4v4.5h4.5",
+    download: "M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4M7 10l5 5 5-5M12 15V3",
+    // Windows 资源管理器式文件浏览:文件夹/文件项与大小图标切换用。
+    folder: "M3 7a2 2 0 0 1 2-2h4l2 2h8a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7Z",
+    file: "M15 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7Z M14 2v4a2 2 0 0 0 2 2h4",
+    viewList: "M8 6h13M8 12h13M8 18h13M3 6h.01M3 12h.01M3 18h.01",
+    viewGrid: "M4 4h7v7H4V4Zm9 0h7v7h-7V4ZM4 13h7v7H4v-7Zm9 0h7v7h-7v-7Z",
+    arrowUp: "M12 19V5M5 12l7-7 7 7",
  } as const;

  export type IconName = keyof typeof ICONS;
@@ -9,8 +9,8 @@
  import { api } from "./api.js";
  import { me, toastErr, toastOk } from "./stores.js";
  import { logout } from "./session.js";
-  import { treeVersion, bumpTree, currentNode, selectedFilePath, clearSelectedFile, bumpFiles } from "./browser.js";
-  import type { NodeChild } from "./types.js";
+  import { treeVersion, bumpTree, currentNode, breadcrumb, selectedFilePath, clearSelectedFile, bumpFiles, restoreNodeId } from "./browser.js";
+  import type { NodeChild, NodeDetail, BreadcrumbEntry } from "./types.js";
  import TreeNode from "./TreeNode.svelte";
  import NodeDetailPanel from "./NodeDetailPanel.svelte";
  import FileEditor from "./FileEditor.svelte";
@@ -35,7 +35,22 @@
    }
  }

-  onMount(loadRoots);
+  onMount(async () => {
+    await loadRoots();
+    // 刷新后恢复之前选中的节点。
+    if (restoreNodeId) {
+      try {
+        const [detail, crumb] = await Promise.all([
+          api<{ node: NodeDetail }>(`/database/api/nodes/${restoreNodeId}`),
+          api<{ breadcrumb: BreadcrumbEntry[] }>(`/database/api/nodes/${restoreNodeId}/breadcrumb`),
+        ]);
+        currentNode.set(detail.node);
+        breadcrumb.set(crumb.breadcrumb);
+      } catch {
+        // 节点已删除或无权访问,静默忽略。
+      }
+    }
+  });
  $effect(() => {
    void $treeVersion;
    void loadRoots();
@@ -63,7 +78,7 @@
    }
  }

-  const initial = $derived(($me?.userId ?? "U").slice(0, 1).toUpperCase());
+  const initial = $derived((($me?.displayName ?? $me?.userId) ?? "U").slice(0, 1).toUpperCase());
 </script>

 <div class="flex min-h-0 flex-1">
@@ -97,7 +112,8 @@
    {#if showUserFooter}
      <div class="flex items-center gap-2 border-t border-line-soft px-4 py-3 text-[12.5px]">
        <div class="flex h-6 w-6 shrink-0 items-center justify-center rounded-full bg-accent text-[11px] font-semibold text-white">{initial}</div>
-        <span class="flex-1 truncate text-ink">{$me?.userId ?? ""}</span>
+        <!-- 展示名优先;/me 取不到 User 行时后端已回落为 userId。 -->
+        <span class="flex-1 truncate text-ink" title={$me?.userId ?? ""}>{$me?.displayName ?? ""}</span>
        <button class="rounded-lg border border-line-soft px-2.5 py-1 text-[11.5px] text-ink-3 transition hover:bg-hover hover:text-ink" onclick={logout} title="退出登录">退出</button>
      </div>
    {/if}
@@ -108,17 +124,15 @@
    <NodeDetailPanel />
  </main>

-  <!-- 右侧:文件预览/编辑栏(选中文件时出现) -->
+  <!-- 文件编辑器(模态框) -->
  {#if $selectedFilePath && $currentNode?.kind === "PROJECT"}
-    <section class="flex w-[46%] min-w-[420px] shrink-0 flex-col overflow-y-auto border-l border-line-soft bg-bg p-4">
-      <FileEditor
-        projectId={$currentNode.id}
-        path={$selectedFilePath}
-        role={$currentNode.role}
-        onchanged={bumpFiles}
-        onclose={clearSelectedFile}
-      />
-    </section>
+    <FileEditor
+      projectId={$currentNode.id}
+      path={$selectedFilePath}
+      role={$currentNode.role}
+      onchanged={bumpFiles}
+      onclose={clearSelectedFile}
+    />
  {/if}
 </div>

@@ -1,15 +1,21 @@
 <script lang="ts">
  import { api } from "./api.js";
-  import { currentNode, breadcrumb, bumpTree, clearSelectedFile } from "./browser.js";
+  import { currentNode, breadcrumb, bumpTree, clearSelectedFile, activeTab, restoreTab } from "./browser.js";
  import { toastOk, toastErr } from "./stores.js";
  import OverviewPanel from "./OverviewPanel.svelte";
  import FilesPanel from "./FilesPanel.svelte";
  import GrantsPanel from "./GrantsPanel.svelte";
+  import HistoryPanel from "./HistoryPanel.svelte";
  import Modal from "./Modal.svelte";
  import Icon from "./Icon.svelte";

-  type Tab = "detail" | "files" | "grants";
-  let tab = $state<Tab>("detail");
+  type Tab = "detail" | "files" | "history" | "grants";
+  const validTabs: readonly Tab[] = ["detail", "files", "history", "grants"];
+  let tab = $state<Tab>((validTabs.includes(restoreTab as Tab) ? restoreTab as Tab : "detail"));
+  /** 跟踪上一次见到的 node id,用于判断是否真正切换了节点。 */
+  let prevNodeId: string | null = null;
+  /** 首次恢复时不重置 tab。 */
+  let restoredOnce = restoreTab !== null;
  let showCreateChild = $state(false);
  let newName = $state("");
  let newKind = $state<"FOLDER" | "PROJECT">("FOLDER");
@@ -20,21 +26,38 @@
  const canManage = $derived(node?.role === "MANAGE");
  const canEdit = $derived(canManage || node?.role === "EDIT");

-  // 与旧 libraryBrowser 的 tab 组装一致:概览恒有;文件仅 PROJECT;授权仅 MANAGE
+  // 与旧 libraryBrowser 的 tab 组装一致:概览恒有;文件仅 PROJECT;修改历史仅 PROJECT;授权仅 MANAGE
  // (FOLDER 也有授权 —— 它虽是透明组织节点,授权仍挂在节点上,ADR-0021)。
  const tabs = $derived.by((): ReadonlyArray<readonly [Tab, string]> => {
    const out: Array<readonly [Tab, string]> = [["detail", "概览"]];
    if (node?.kind === "PROJECT") out.push(["files", "文件"]);
+    if (node?.kind === "PROJECT") out.push(["history", "修改历史"]);
    if (canManage) out.push(["grants", "授权"]);
    return out;
  });

  $effect(() => {
-    void node?.id;
-    tab = "detail";
+    const id = node?.id ?? null;
+    // node 还未加载或与上次相同时不做任何事。
+    if (id === null || id === prevNodeId) return;
+    prevNodeId = id;
+    if (restoredOnce) {
+      // 首次恢复(刷新后)保持 persisted tab,但要确保 tab 对当前节点有效。
+      restoredOnce = false;
+      const isProject = node?.kind === "PROJECT";
+      if ((tab === "files" || tab === "history") && !isProject) tab = "detail";
+      if (tab === "grants" && node?.role !== "MANAGE") tab = "detail";
+    } else {
+      tab = "detail";
+    }
    clearSelectedFile();
  });

+  // tab 变化时同步到持久化 store。
+  $effect(() => {
+    activeTab.set(tab);
+  });
+
  async function createChild(): Promise<void> {
    const name = newName.trim();
    if (name === "" || node === null) return;
@@ -129,6 +152,8 @@
      <GrantsPanel {node} />
    {:else if tab === "files" && node.kind === "PROJECT"}
      <FilesPanel {node} />
+    {:else if tab === "history" && node.kind === "PROJECT"}
+      <HistoryPanel {node} />
    {:else}
      <OverviewPanel {node} />
      {#if node.kind === "FOLDER"}
@@ -4,12 +4,14 @@
  import { currentNode } from "./browser.js";
  import type { ExportJob, NodeDetail } from "./types.js";
  import Modal from "./Modal.svelte";
+  import Icon from "./Icon.svelte";

  let { node }: { node: NodeDetail } = $props();

  let showEditDesc = $state(false);
  let descDraft = $state("");
  let exportJob = $state<ExportJob | null>(null);
+  let exporting = $state(false);

  const canEdit = $derived(node.role === "MANAGE" || node.role === "EDIT");
  const canManage = $derived(node.role === "MANAGE");
@@ -34,6 +36,7 @@
  $effect(() => {
    void node.id;
    exportJob = null;
+    exporting = false;
  });

  function openEditDesc(): void {
@@ -57,31 +60,63 @@
    }
  }

-  async function submitExport(): Promise<void> {
+  /**
+   * 导出 PDF:提交 job → 轮询 → 完成即自动触发浏览器下载。
+   *
+   * 只有一个导出目标,所以不给目标选择器 —— target 由后端 adapter 固定。
+   * 下载走 <a download> 而非 fetch+blob:接口是 same-origin cookie 认证,
+   * 浏览器直接带上会话,不需要在 JS 里搬一遍字节。
+   */
+  async function exportPdf(): Promise<void> {
+    if (exporting) return;
+    exporting = true;
+    exportJob = null;
    try {
      const r = await api<{ jobId: string; status: string }>(`/database/api/projects/${node.id}/exports`, {
        method: "POST",
-        body: { target: "manifest" },
+        body: { target: "pdf" },
      });
-      toastOk("导出已提交");
-      void pollExport(r.jobId);
+      await pollExport(r.jobId);
    } catch (e) {
      toastErr(e instanceof Error ? e.message : String(e));
+      exporting = false;
    }
  }

  async function pollExport(jobId: string): Promise<void> {
    for (;;) {
      await new Promise((r) => setTimeout(r, 800));
+      let job: ExportJob;
      try {
-        const job = await api<ExportJob>(`/database/api/exports/${jobId}`);
-        exportJob = job;
-        if (job.status === "DONE" || job.status === "FAILED") break;
-      } catch {
-        break;
+        job = await api<ExportJob>(`/database/api/exports/${jobId}`);
+      } catch (e) {
+        exporting = false;
+        toastErr(e instanceof Error ? e.message : String(e));
+        return;
+      }
+      exportJob = job;
+      if (job.status === "DONE") {
+        exporting = false;
+        toastOk("导出完成,开始下载");
+        triggerDownload(`/database/api/exports/${job.id}/download`);
+        return;
+      }
+      if (job.status === "FAILED") {
+        exporting = false;
+        toastErr(`导出失败:${job.error ?? "未知原因"}`);
+        return;
      }
    }
  }
+
+  function triggerDownload(url: string): void {
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = "";
+    document.body.appendChild(a);
+    a.click();
+    a.remove();
+  }
 </script>

 <div class="panel">
@@ -124,18 +159,16 @@

    <div class="section-title mb-2">导出</div>
    <div class="flex items-center gap-2">
-      <select class="select !w-auto"><option value="manifest">manifest(stub)</option></select>
-      <button class="btn" onclick={submitExport}>开始导出</button>
-      {#if exportJob}
+      <button class="btn" onclick={exportPdf} disabled={exporting}>
+        <Icon name="download" size={13} />
+        {exporting ? "导出中…" : "导出 PDF"}
+      </button>
+      {#if exportJob?.status === "DONE"}
        <span class="file-meta">
-          {#if exportJob.status === "DONE"}
-            完成 · <a class="text-accent underline" href="/database/api/exports/{exportJob.id}/download">下载</a>
-          {:else if exportJob.status === "FAILED"}
-            失败:{exportJob.error ?? ""}
-          {:else}
-            {exportJob.status}…
-          {/if}
+          完成 · <a class="text-accent underline" href="/database/api/exports/{exportJob.id}/download" download>重新下载</a>
        </span>
+      {:else if exportJob?.status === "FAILED"}
+        <span class="file-meta text-danger">失败:{exportJob.error ?? "未知原因"}</span>
      {/if}
    </div>
  {/if}
@@ -1,17 +1,62 @@
-import { writable } from "svelte/store";
+import { writable, get } from "svelte/store";
 import type { BreadcrumbEntry, NodeDetail } from "./types.js";

+const STORAGE_KEY = "filelib.browser";
+
+interface PersistedState {
+  expanded: string[];
+  currentNodeId: string | null;
+  tab: string | null;
+  selectedFilePath: string | null;
+}
+
+function loadPersisted(): PersistedState {
+  try {
+    const raw = sessionStorage.getItem(STORAGE_KEY);
+    if (raw) return JSON.parse(raw) as PersistedState;
+  } catch { /* ignore */ }
+  return { expanded: [], currentNodeId: null, tab: null, selectedFilePath: null };
+}
+
+function savePersisted(): void {
+  try {
+    const state: PersistedState = {
+      expanded: [...get(expanded)],
+      currentNodeId: get(currentNode)?.id ?? null,
+      tab: get(activeTab),
+      selectedFilePath: get(selectedFilePath),
+    };
+    sessionStorage.setItem(STORAGE_KEY, JSON.stringify(state));
+  } catch { /* sessionStorage 不可用时静默忽略 */ }
+}
+
+const persisted = loadPersisted();
+
 /** 树展开集合 / 当前选中节点 / 面包屑 / 树刷新计数。 */
-export const expanded = writable<Set<string>>(new Set());
+export const expanded = writable<Set<string>>(new Set(persisted.expanded));
 export const currentNode = writable<NodeDetail | null>(null);
 export const breadcrumb = writable<BreadcrumbEntry[]>([]);
 export const treeVersion = writable(0);

+/** 刷新后需要恢复的节点 ID;LibraryView onMount 消费后清空。 */
+export const restoreNodeId = persisted.currentNodeId;
+/** 刷新后需要恢复的 tab;NodeDetailPanel 消费。 */
+export const restoreTab = persisted.tab;
+
 /** 右侧预览栏:当前选中文件路径(项目内);切换节点时清空。 */
-export const selectedFilePath = writable<string | null>(null);
+export const selectedFilePath = writable<string | null>(persisted.selectedFilePath);
 /** 文件列表刷新计数(编辑器保存/删除后 bump,列表随之重载)。 */
 export const filesVersion = writable(0);

+/** 当前激活的 tab(由 NodeDetailPanel 写入,持久化用)。 */
+export const activeTab = writable<string | null>(persisted.tab);
+
+// 订阅需要持久化的 store,变化时写 sessionStorage。
+expanded.subscribe(() => savePersisted());
+currentNode.subscribe(() => savePersisted());
+selectedFilePath.subscribe(() => savePersisted());
+activeTab.subscribe(() => savePersisted());
+
 export function bumpTree(): void {
  treeVersion.update((v) => v + 1);
 }
@@ -12,6 +12,8 @@ import { api } from "./api.js";
 export interface AppConfig {
  readonly orgSlug: string;
  readonly devLoginEnabled: boolean;
+  /** 单文件上传上限(字节)。后端 `HUB_FILELIB_MAX_FILE_BYTES` 的生效值。 */
+  readonly maxFileBytes: number;
 }

 let cached: AppConfig | null = null;
@@ -63,6 +63,15 @@ export interface VersionInfo {
  readonly committedAt: string;
 }

+/** 项目级提交历史条目(包含受影响文件路径)。 */
+export interface ProjectCommitInfo {
+  readonly version: string;
+  readonly message: string;
+  readonly author?: string;
+  readonly committedAt: string;
+  readonly files: readonly string[];
+}
+
 export interface ExportJob {
  readonly id: string;
  readonly nodeId: string;
@@ -72,21 +81,6 @@ export interface ExportJob {
  readonly createdAt: string;
 }

-export interface Grant {
-  readonly id: string;
-  readonly principalType: "USER" | "GROUP";
-  readonly principalId: string;
-  readonly role: Role;
-  readonly isCreatorGrant: boolean;
-  readonly createdAt: string;
-}
-
-export interface GroupSearchResult {
-  readonly id: string;
-  readonly name: string;
-  readonly breadcrumb: string;
-}
-
 /** 成员组(ADR-0028);后端返回扁平列表,前端按 parentId/depth 拼树。 */
 export interface MemberGroupNode {
  readonly id: string;
@@ -114,6 +108,8 @@ export interface Grant {
  readonly id: string;
  readonly principalType: "USER" | "GROUP";
  readonly principalId: string;
+  /** 后端解析好的展示名(USER→displayName / GROUP→组名);取不到行时回落为 principalId。 */
+  readonly principalName: string;
  readonly role: Role;
  /** 创建者授权不可收回、不可改(契约 8.1)。 */
  readonly isCreatorGrant: boolean;
@@ -28,9 +28,18 @@

  const BASE = "/database/dashboard";

-  onMount(async () => {
-    await loadSession();
-    if ($me === null) void goto("/database/admin", { replaceState: true });
+  onMount(loadSession);
+
+  /**
+   * 未登录一律回登录页 —— 必须是 effect 而非 onMount 里的一次性判断:
+   * `logout()` 只清 store(它被老师端 /app 共用,那边 me=null 是终态而非跳转),
+   * 退出后这层壳会重新渲染成 me===null,若跳转只写在 onMount 就永远停在
+   * "跳转到登录页…"。
+   */
+  $effect(() => {
+    if ($authChecked && $me === null) {
+      void goto("/database/admin", { replaceState: true });
+    }
  });

  function href(seg: string): string {
@@ -1,5 +1,6 @@
 import { sveltekit } from "@sveltejs/kit/vite";
 import tailwindcss from "@tailwindcss/vite";
+import wasm from "vite-plugin-wasm";
 import { defineConfig } from "vite";

 // 老师端 /app + 管理后台 /database/* 的唯一前端工程;构建产物由 hub 后端静态托管。
@@ -8,7 +9,7 @@ import { defineConfig } from "vite";
 const backend = "http://127.0.0.1:8788";

 export default defineConfig({
-  plugins: [tailwindcss(), sveltekit()],
+  plugins: [wasm(), tailwindcss(), sveltekit()],
  server: {
    port: 5173,
    proxy: {
@@ -268,9 +268,30 @@ export async function registerAuthRoutes(app: FastifyInstance, config: AuthRoute
    }
  });

-  app.post("/auth/logout", async (_request, reply) => {
-    reply.clearCookie(SESSION_COOKIE_NAME, { path: "/" });
-    return reply.status(204).send();
+  // 退出登录不读 body,但调用方(curl -d、Postman、部分 HTTP 客户端)常给空
+  // POST 自动带上 Content-Type。Fastify 默认只有 JSON parser,遇到别的媒体类型
+  // 会在解析阶段以 415 拒掉,进不到 handler —— 对一个"无输入"的端点没有意义。
+  //
+  // 这里用 register 起一个封装作用域,catch-all parser 只在其中生效。
+  // **不要**把 parser 加到外层 app 上:admin plugin 没有 fastify-plugin 封装,
+  // 那样会让全站每个 POST/PUT/PATCH 都接受 form-urlencoded。而 form-urlencoded
+  // 是跨站 HTML form 唯一能发出的媒体类型(application/json 会触发 CORS
+  // preflight),"只认 JSON"本身是一层 CSRF 纵深防御,不能为了这个端点全局放掉。
+  await app.register(async (scope) => {
+    // parseAs:"string" 让 Fastify 负责读完流(否则连接不释放),这里直接丢掉内容
+    // —— 该端点不接受任何输入。
+    // "*" 只兜没有专属 parser 的媒体类型;内建 JSON parser 优先级更高,空 body
+    // 会被它判成 FST_ERR_CTP_EMPTY_JSON_BODY(400),所以要在本作用域内覆盖掉。
+    for (const mediaType of ["*", "application/json"]) {
+      scope.addContentTypeParser(mediaType, { parseAs: "string" }, (_request, _body, done) => {
+        done(null, undefined);
+      });
+    }
+
+    scope.post("/auth/logout", async (_request, reply) => {
+      reply.clearCookie(SESSION_COOKIE_NAME, { path: "/" });
+      return reply.status(204).send();
+    });
  });

  app.get("/auth/feishu/complete", async (request, reply) => {
@@ -110,7 +110,8 @@ allowDevLoginBypass = (NODE_ENV !== "production") && HUB_DEV_LOGIN_BYPASS 为真
 | `filelib/grantService.ts` | 授权管理 + 契约 8.1 矩阵强制 + force_adjust |
 | `filelib/fileService.ts` | 文件路径安全 + 版本化读写(先 git 后审计的顺序铁律) |
 | `filelib/exportService.ts` | 导出 job 状态机(D10 异步)+ ExportAdapter port |
-| `filelib/versionStore.ts` | 契约 C1 port + 内存实现(版本团队 npm 包到位后替换) |
+| `filelib/versionStore.ts` | 契约 C1 port + 内存实现(**仅测试用**,ADR-0030) |
+| `filelib/gitVersionStore.ts` | **生产** C1 实现:一项目一 git 仓库,VersionId = commit hash(ADR-0030) |
 | `filelib/groupResolver.ts` | 契约 C2 port(+ 已弃用的 Team 过渡实现,ADR-0028) |
 | `filelib/memberGroupResolver.ts` | **默认** C2 实现:读 in-hub MemberGroup 闭包(ADR-0028) |
 | `filelib/memberGroupService.ts` | 成员组 CRUD(含改名)+ 成员增删 + 闭包维护 + 搜索(ADR-0028) |
@@ -125,9 +126,20 @@ allowDevLoginBypass = (NODE_ENV !== "production") && HUB_DEV_LOGIN_BYPASS 为真
 - `HUB_GROUP_SERVICE_URL` — 外部 Group 服务地址(C2);**未配置时读 in-hub
  MemberGroup 闭包**(ADR-0028 起的默认;此前是扁平 hub Team)

-> ⚠️ 开发期注意:当前 VersionStore 是**进程内存**实现,**服务重启后仓库全失**,
-> 此前创建的项目再访问文件会报 `repo_not_found`(需重建项目)。版本团队的
-> 持久化 git 包到位后此问题消失。
+## 存储布局(ADR-0030)
+
+- **文件夹不落盘。** `FOLDER` 节点的 `storageDir` 永为 `NULL`,磁盘上不存在任何
+  对应目录;树形只由 `parentId` + `pathIds`(id 编码的物化路径)表达。
+- **项目扁平、以 id 命名。** 仓库就是 `<storageRoot>/<nodeId>`(nodeId 是 uuid)。
+  名字不进路径 —— 这是 rename 不动磁盘、也不重写后代路径的原因。
+- **一项目一真 git 仓库。** `init` 建目录 + `git init`;`VersionId` 是 40 位 commit
+  hash;某文件的版本 = `git log -1 -- <path>`,所以一个文件的提交不会使另一个
+  文件的 `baseVersion` 失效(D16)。删除也是一个 commit,旧版本仍可读。
+- git 用 `execFile` 调系统二进制,不引依赖。**每次调用都禁 hooks、隔离全局/系统
+  gitconfig、`GIT_LITERAL_PATHSPECS=1`** —— 项目仓库是老师上传的**数据**而非可信代码。
+- 宿主必须有 `git`;缺失时建项目报 `provision_failed`。
+- 写入仅**进程内**串行化。共享 storage root 的多进程会在同一仓库上竞争 git 锁;
+  alpha Silo 是一 org 一进程(ADR-0025),目前不可达。

 关键语义速查:

@@ -7,11 +7,18 @@
 */

 import { randomUUID } from "node:crypto";
+import { execFile } from "node:child_process";
+import { mkdtemp, mkdir, readFile, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import { promisify } from "node:util";
 import { FileLibError } from "./model.js";
 import { FILE_LIB_AUDIT_ACTIONS, writeFileLibAudit } from "./audit.js";
 import { requireAccessInTx, type FileLibActor } from "./treeService.js";
 import type { FileDeps } from "./fileService.js";

+const execFileAsync = promisify(execFile);
+
 export interface ExportAdapterInput {
  readonly storageDir: string;
  readonly target: string;
@@ -49,8 +56,146 @@ export function createManifestStubAdapter(versionStore: FileDeps["versionStore"]
  };
 }

+/** `cph` 可执行文件位置;生产由 preflight 校验为绝对路径(见 deployment/preflight.ts)。 */
+const CPH_BIN = process.env["CPH_BIN"] ?? "cph";
+/** typst 渲染包目录;未设时由 cph 自行解析(仓库内 `render/`)。 */
+const CPH_RENDER_DIR = process.env["CPH_RENDER_DIR"];
+const CPH_BUILD_TIMEOUT_MS = 120_000;
+/**
+ * 默认导出 target。
+ *
+ * UI 只给一个「导出 PDF」按钮,不让用户选 target;`student` 是 cph 自身在
+ * 工程文件未声明 `[targets.*]` 时的默认值(cph-check DEFAULT_TARGET),
+ * 与之保持一致,避免两端各有一套默认。
+ */
+const DEFAULT_PDF_TARGET = "student";
+
+/**
+ * 真导出适配器:把项目物化到临时目录,跑 `cph build`,取回 PDF 字节。
+ *
+ * 为什么不直接在 `storageDir`(git worktree)里跑构建:那是项目的版本库工作区,
+ * 构建产物会变成未跟踪文件混进去,后续 `list`/`commit` 的语义会被污染。
+ * 物化到临时目录让构建对版本库完全无副作用,代价是一次文件拷贝。
+ */
+export function createCphPdfAdapter(): ExportAdapter {
+  return {
+    target: "pdf",
+    async run(input) {
+      await requireCourswareCph();
+      const target = typeof input.params["target"] === "string" ? input.params["target"] : DEFAULT_PDF_TARGET;
+      const workDir = await mkdtemp(path.join(tmpdir(), "cph-export-"));
+      try {
+        await materialize(input, workDir);
+        const outRel = path.join("build", `${target}.pdf`);
+        const args = ["build", ".", "--target", target, "-o", outRel];
+        if (CPH_RENDER_DIR !== undefined && CPH_RENDER_DIR !== "") {
+          args.unshift("--render-dir", CPH_RENDER_DIR);
+        }
+        await runCphBuild(args, workDir);
+        const content = await readFile(path.join(workDir, outRel));
+        return { filename: `${target}.pdf`, content };
+      } finally {
+        await rm(workDir, { recursive: true, force: true });
+      }
+    },
+  };
+}
+
+/**
+ * 确认 CPH_BIN 指向的是 Courseware 检查器,而不是同名的其它工具。
+ *
+ * `cph` 这个名字在 PyPI 上已被 conda 的 conda-package-handling 占用,装了
+ * miniconda 的机器上 PATH 里的 `cph` 就是它。直接拿它跑 `build` 会得到
+ * 一句 argparse 的 "invalid choice: 'build'",根本看不出是撞名 —— 所以这里先用
+ * `--version` 探一下,把撞名变成一条能直接终止排查的错误。
+ *
+ * 结果缓存:探测只为拦配置错误,没必要每次导出都多起一个进程。
+ */
+let cphIdentityCheck: Promise<void> | null = null;
+
+function requireCourswareCph(): Promise<void> {
+  cphIdentityCheck ??= (async () => {
+    let stdout: string;
+    try {
+      ({ stdout } = await execFileAsync(CPH_BIN, ["--version"], { timeout: 10_000 }));
+    } catch (error) {
+      const err = error as NodeJS.ErrnoException;
+      if (err.code === "ENOENT") {
+        throw new FileLibError(
+          500,
+          "cph_not_found",
+          `cph binary not found at "${CPH_BIN}" (set CPH_BIN to the Courseware cph)`,
+        );
+      }
+      throw new FileLibError(500, "cph_unusable", `cph --version failed at "${CPH_BIN}": ${String(err.message)}`);
+    }
+    if (!/^cph\s+\d+\.\d+\.\d+/.test(stdout.trim())) {
+      throw new FileLibError(
+        500,
+        "cph_wrong_binary",
+        `"${CPH_BIN}" is not the Courseware cph checker (--version said: ${stdout.trim().split("\n")[0] ?? ""}). ` +
+          `Set CPH_BIN to the Courseware cph binary.`,
+      );
+    }
+  })().catch((error: unknown) => {
+    // 不缓存失败:改完 CPH_BIN 重启前,下一次导出应该重新探测。
+    cphIdentityCheck = null;
+    throw error;
+  });
+  return cphIdentityCheck;
+}
+
+/** 把版本库当前内容写进 workDir。路径已由 versionStore 的 safeRelPath 约束。 */
+async function materialize(input: ExportAdapterInput, workDir: string): Promise<void> {
+  const files = await input.listFiles();
+  if (files.length === 0) {
+    throw new FileLibError(409, "export_empty_project", "project has no files to export");
+  }
+  for (const f of files) {
+    const abs = path.join(workDir, f.path);
+    await mkdir(path.dirname(abs), { recursive: true });
+    await writeFile(abs, await input.readFile(f.path));
+  }
+}
+
+/**
+ * 跑 `cph build`。cph 的约定是诊断走 stderr、退出码非零表示构建失败(ADR-0010),
+ * 所以失败时把 stderr 原样带进错误信息 —— 老师需要看到是哪个诊断挡住了导出。
+ */
+async function runCphBuild(args: readonly string[], cwd: string): Promise<void> {
+  try {
+    await execFileAsync(CPH_BIN, args, { cwd, timeout: CPH_BUILD_TIMEOUT_MS, maxBuffer: 10 * 1024 * 1024 });
+  } catch (error) {
+    const err = error as NodeJS.ErrnoException & { stdout?: string; stderr?: string };
+    if (err.code === "ENOENT") {
+      throw new FileLibError(500, "cph_not_found", `cph binary not found at "${CPH_BIN}"`);
+    }
+    const detail = (err.stderr ?? "").trim() || (err.stdout ?? "").trim() || err.message;
+    throw new FileLibError(422, "cph_build_failed", `cph build failed: ${detail}`);
+  }
+}
+
 // v1 stub 产物存储(进程内存,重启即失;生产替换为持久存储)。
 const artifacts = new Map<string, ExportArtifact>();
+/**
+ * 内存里最多保留的产物份数。
+ *
+ * 产物不做持久化也不复用 —— 每次导出都按仓库当前内容重新编译,内存副本只为
+ * 支撑「提交完成后那一次下载」。因此这里可以无条件淘汰最旧的:被淘汰的 job 再点
+ * 下载会拿到 export_not_ready,重新导出即可,不存在数据丢失。
+ * 没有上限的话每次导出都会永久占住一份 PDF(数百 KB 级),进程内存只增不减。
+ */
+const MAX_RETAINED_ARTIFACTS = 32;
+
+/** Map 迭代顺序即插入顺序,首个 key 就是最旧的产物。 */
+function retainArtifact(jobId: string, artifact: ExportArtifact): void {
+  artifacts.set(jobId, artifact);
+  while (artifacts.size > MAX_RETAINED_ARTIFACTS) {
+    const oldest = artifacts.keys().next();
+    if (oldest.done === true) break;
+    artifacts.delete(oldest.value);
+  }
+}

 export interface ExportDeps extends FileDeps {
  readonly adapters: readonly ExportAdapter[];
@@ -136,7 +281,7 @@ async function runExportJob(
      listFiles: (prefix) => deps.versionStore.list(storageDir, prefix),
      readFile: (path) => deps.versionStore.read(storageDir, path),
    });
-    artifacts.set(jobId, artifact);
+    retainArtifact(jobId, artifact);
    await deps.prisma.fileLibExportJob.update({
      where: { id: jobId },
      data: { status: "DONE", downloadUrl: `/database/api/exports/${jobId}/download` },
@@ -10,14 +10,43 @@

 import { FileLibError } from "./model.js";
 import { FILE_LIB_AUDIT_ACTIONS, writeFileLibAudit } from "./audit.js";
-import type { CommitResult, FileEntry, VersionInfo, VersionStore } from "./versionStore.js";
+import type { CommitResult, FileEntry, VersionInfo, VersionStore, ProjectCommitInfo } from "./versionStore.js";
 import type { AccessDeps, FileLibActor } from "./treeService.js";
 import { requireAccessInTx } from "./treeService.js";
 import type { FileLibNode, PrismaClient } from "@prisma/client";

 export const FILE_PATH_MAX_LENGTH = 512;
 export const FILE_PATH_MAX_DEPTH = 32;
-export const FILE_CONTENT_MAX_BYTES = 10 * 1024 * 1024; // OPEN-5 初值
+
+/** 单文件上限的出厂默认值(OPEN-5 初值)。实际生效值见 `resolveMaxFileBytes`。 */
+export const FILE_CONTENT_MAX_BYTES_DEFAULT = 10 * 1024 * 1024;
+
+/**
+ * 单文件字节上限的纯解析。非法值(非正整数/NaN)按缺省处理 ——
+ * 配置写错不该让上传静默变成 0 上限(那会把每次上传都拒掉)。
+ *
+ * 与 `resolveMaxFileBytes` 分开是有意的:带默认参数的单函数版本里,
+ * 显式传 undefined 会触发默认值、回到读 env,于是“没传值”和“读环境变量”
+ * 永远分不开,测试也会被 vitest 加载的 .env 干扰。
+ */
+export function parseMaxFileBytes(raw: string | undefined): number {
+  if (raw === undefined || raw.trim() === "") return FILE_CONTENT_MAX_BYTES_DEFAULT;
+  const parsed = Number(raw.trim());
+  if (!Number.isSafeInteger(parsed) || parsed <= 0) return FILE_CONTENT_MAX_BYTES_DEFAULT;
+  return parsed;
+}
+
+/**
+ * 生效上限:`HUB_FILELIB_MAX_FILE_BYTES` 覆盖,缺省 10MiB。
+ *
+ * 注意它与 `HUB_HTTP_BODY_LIMIT_BYTES` 是串联的:上传把内容放在 JSON body 里,
+ * 二进制过 base64 体积涨 4/3,所以真正的天花板是
+ * min(本值, bodyLimit × 3/4)。body limit 太小时本值不可达,而且报错发生在
+ * Fastify 解析阶段(413 Payload Too Large),根本到不了下面的 checkSize。
+ */
+export function resolveMaxFileBytes(): number {
+  return parseMaxFileBytes(process.env["HUB_FILELIB_MAX_FILE_BYTES"]);
+}

 const CONTROL_CHARS = /[\p{C}]/u;
 const FORBIDDEN_SEGMENTS = new Set(["", ".", "..", ".git"]);
@@ -52,6 +81,8 @@ export function validateFilePath(raw: string): string {
 export interface FileDeps extends AccessDeps {
  readonly prisma: PrismaClient;
  readonly versionStore: VersionStore;
+  /** 单文件字节上限。装配处用 `resolveMaxFileBytes()` 求值,缺省即出厂值。 */
+  readonly maxFileBytes?: number | undefined;
 }

 type ProjectChain = { readonly node: FileLibNode; readonly storageDir: string };
@@ -101,13 +132,25 @@ function encodeContent(buffer: Buffer): { readonly encoding: FileContentEncoding
    : { encoding: "utf8", content: buffer.toString("utf8") };
 }

-function checkSize(content: string | Buffer): void {
+function checkSize(content: string | Buffer, maxBytes: number): void {
  const bytes = typeof content === "string" ? Buffer.byteLength(content, "utf8") : content.byteLength;
-  if (bytes > FILE_CONTENT_MAX_BYTES) {
-    throw new FileLibError(413, "file_too_large", `file exceeds ${FILE_CONTENT_MAX_BYTES} bytes`);
+  if (bytes > maxBytes) {
+    throw new FileLibError(413, "file_too_large", `file exceeds ${maxBytes} bytes`);
  }
 }

+/**
+ * commit message 的默认文案:`【用户名】修改了【路径】`。
+ * 用户名取 displayName,缺失回退 userId(权限判定从不看它)。
+ * 显式传 message 的调用方优先 —— 这里只填空缺。
+ */
+export function defaultCommitMessage(actor: FileLibActor, filePath: string): string {
+  const who = actor.displayName === undefined || actor.displayName.trim() === ""
+    ? actor.userId
+    : actor.displayName.trim();
+  return `【${who}】修改了【${filePath}】`;
+}
+
 async function auditFile(
  deps: FileDeps,
  actor: FileLibActor,
@@ -185,6 +228,17 @@ export async function fileHistory(
  return deps.versionStore.history(project.storageDir, filePath, limit);
 }

+/** 项目级提交历史(所有文件),VIEW 即可访问。 */
+export async function projectHistory(
+  deps: FileDeps,
+  actor: FileLibActor,
+  projectId: string,
+  limit?: number,
+): Promise<readonly ProjectCommitInfo[]> {
+  const project = await requireProject(deps, actor, projectId, "VIEW");
+  return deps.versionStore.projectHistory(project.storageDir, limit);
+}
+
 export async function diffFile(
  deps: FileDeps,
  actor: FileLibActor,
@@ -221,14 +275,21 @@ export async function commitFile(
 ): Promise<{ readonly version: string }> {
  const filePath = validateFilePath(input.path);
  const content = decodeContent(input.content, input.encoding ?? "utf8");
-  checkSize(content);
+  checkSize(content, deps.maxFileBytes ?? resolveMaxFileBytes());
  const project = await requireProject(deps, actor, projectId, "EDIT");

+  // 调用方传了非空 message 则用它,否则回退默认文案。
+  // 空串必须当作没传:`git commit -m ""` 会以 empty commit message 失败。
+  const trimmedMessage = input.message?.trim();
+  const message = trimmedMessage === undefined || trimmedMessage === ""
+    ? defaultCommitMessage(actor, filePath)
+    : trimmedMessage;
  const result: CommitResult = await deps.versionStore.commit(project.storageDir, filePath, {
    baseVersion: input.baseVersion,
    content,
-    message: input.message,
-    author: actor.userId,
+    message,
+    // 身份:name=displayName(回退 userId),email=<userId>@域名(git 实现里拼)。
+    author: { userId: actor.userId, displayName: actor.displayName },
  });

  if (result.status === "conflict") {
@@ -247,7 +308,7 @@ export async function commitFile(
    input.baseVersion === null ? FILE_LIB_AUDIT_ACTIONS.fileUpload : FILE_LIB_AUDIT_ACTIONS.fileCommit,
    project,
    filePath,
-    { version: result.version, message: input.message ?? null },
+    { version: result.version, message },
  );
  return { version: result.version };
 }
@@ -261,7 +322,10 @@ export async function deleteFile(
 ): Promise<void> {
  const filePath = validateFilePath(rawPath);
  const project = await requireProject(deps, actor, projectId, "EDIT");
-  const result = await deps.versionStore.remove(project.storageDir, filePath, baseVersion);
+  const result = await deps.versionStore.remove(project.storageDir, filePath, baseVersion, {
+    userId: actor.userId,
+    displayName: actor.displayName,
+  });
  if (result.status === "conflict") {
    await auditFile(deps, actor, FILE_LIB_AUDIT_ACTIONS.fileConflictDetected, project, filePath, {
      baseVersion,
@@ -0,0 +1,443 @@
+/**
+ * VersionStore(契约 C1)的真 git 实现 —— ADR-0030。
+ *
+ * 一个项目一个 git 仓库,位于 <storageRoot>/<nodeId>(nodeId 是 uuid;
+ * 文件夹不落盘,见 ADR-0030 Context)。VersionId = commit hash。
+ *
+ * D16 文件级版本的映射(ADR-0030 Decision):一次写只碰一个路径、只产生一个
+ * commit;某文件的版本 = `git log -1 -- <path>` 的 hash。因此 a.md 的提交不出现在
+ * b.md 的 log 里,两者 baseVersion 互不失效 —— 尽管 commit 本身是仓库级对象。
+ *
+ * 不引 npm 依赖:三条 execFile 就够,见 ADR-0030 Alternatives。
+ */
+
+import { execFile } from "node:child_process";
+import { access, mkdir, writeFile } from "node:fs/promises";
+import path from "node:path";
+import { FileLibError } from "./model.js";
+import type {
+  CommitAuthor,
+  CommitRequest,
+  CommitResult,
+  FileEntry,
+  ProjectCommitInfo,
+  VersionId,
+  VersionInfo,
+  VersionStore,
+} from "./versionStore.js";
+
+/** 无 author 时的固定身份(ADR-0030 Consequences:不再是 undefined)。 */
+const FALLBACK_AUTHOR = "filelib";
+/** 提交者 email 域名:`<userId>@filelib.paradigm-edu.net`。 */
+const AUTHOR_EMAIL_DOMAIN = "filelib.paradigm-edu.net";
+
+/**
+ * 每次调用都带的加固(ADR-0030 Decision)。项目仓库是老师上传的**数据**,
+ * 不是可信代码:hooks 必须禁用,全局/系统 gitconfig 必须隔离,否则仓库内容
+ * 或开发者机器上的配置就能改变服务端行为。
+ */
+const HARDENING_ARGS = ["-c", "core.hooksPath=", "-c", "commit.gpgsign=false"] as const;
+
+/**
+ * 仓库定位参数。**这两个不能省**:git 默认会沿目录树**向上**找 `.git`,
+ * 而 storage root 很可能就在另一个 git 仓库里(本地开发的默认值
+ * `hub/.filelib-repos` 就在本 repo 内)。不钉死的后果是项目目录没自己的 `.git`
+ * 时,所有命令默默落到**外层仓库**上 —— 轻则 `git add` 报 ignored,
+ * 重则把老师的文件提交进源码仓。
+ */
+function repoArgs(projectDir: string): readonly string[] {
+  return [`--git-dir=${path.join(projectDir, ".git")}`, `--work-tree=${projectDir}`];
+}
+
+const HARDENING_ENV = {
+  GIT_CONFIG_GLOBAL: "/dev/null",
+  GIT_CONFIG_SYSTEM: "/dev/null",
+  // 文件名永远不被重解释为 pathspec magic(`:(glob)` 等)。
+  GIT_LITERAL_PATHSPECS: "1",
+  // 仓库不得因为凭据提示卡住一个 HTTP 请求。
+  GIT_TERMINAL_PROMPT: "0",
+} as const;
+
+/**
+ * 继承来的这几个会劫持全部命令(比如 hub 自身被一个 git hook 启动时),
+ * 必须从子进程 env 里**删掉**而不是置空 —— 置空在 git 里的含义并不统一。
+ * 我们只认 repoArgs 里显式传的那一份。
+ */
+const STRIPPED_ENV = ["GIT_DIR", "GIT_WORK_TREE", "GIT_INDEX_FILE", "GIT_OBJECT_DIRECTORY"] as const;
+
+function childEnv(extra: Readonly<Record<string, string>>): NodeJS.ProcessEnv {
+  const env: NodeJS.ProcessEnv = { ...process.env, ...HARDENING_ENV, ...extra };
+  for (const key of STRIPPED_ENV) delete env[key];
+  return env;
+}
+
+interface GitResult {
+  readonly stdout: Buffer;
+  readonly code: number;
+  readonly stderr: string;
+}
+
+/** execFile 的 args 数组形式:不拼 shell,文件名不参与命令解析。 */
+function runGit(
+  cwd: string,
+  args: readonly string[],
+  env: Readonly<Record<string, string>> = {},
+): Promise<GitResult> {
+  return execGit(cwd, [...repoArgs(cwd), ...args], env);
+}
+
+/**
+ * 不钉 --git-dir 的调用。**只给 `git init` 用** —— 那一刻 `.git` 尚不存在,
+ * 钉上去 git 会直接报错。init 自己总是在 cwd 建仓,不会向上找。
+ */
+function runGitBare(
+  cwd: string,
+  args: readonly string[],
+  env: Readonly<Record<string, string>> = {},
+): Promise<GitResult> {
+  return execGit(cwd, args, env);
+}
+
+function execGit(
+  cwd: string,
+  args: readonly string[],
+  env: Readonly<Record<string, string>>,
+): Promise<GitResult> {
+  return new Promise((resolve, reject) => {
+    execFile(
+      "git",
+      [...HARDENING_ARGS, ...args],
+      {
+        cwd,
+        encoding: "buffer",
+        env: childEnv(env),
+        maxBuffer: 64 * 1024 * 1024,
+        windowsHide: true,
+      },
+      (error, stdout, stderr) => {
+        const out = Buffer.isBuffer(stdout) ? stdout : Buffer.from(String(stdout));
+        const err = Buffer.isBuffer(stderr) ? stderr.toString("utf8") : String(stderr);
+        if (error === null) {
+          resolve({ stdout: out, code: 0, stderr: err });
+          return;
+        }
+        const code = (error as NodeJS.ErrnoException & { code?: number | string }).code;
+        if (code === "ENOENT") {
+          // 坑:spawn 的 ENOENT 有两种来源且**报错完全一样**(都是 path:"git"、
+          // syscall:"spawn git") —— git 真的不在 PATH 上,或者 cwd 目录不存在。
+          // 后者在这里是常态(DB 里有 storageDir、磁盘上却没建过,比如内存 store
+          // 时代留下的旧项目),必须报 repo_not_found 而不是冤枉 git 没装。
+          void access(cwd).then(
+            () => reject(new FileLibError(500, "git_missing", "git executable not found on PATH")),
+            () => reject(new FileLibError(404, "repo_not_found", `repository directory missing: ${cwd}`)),
+          );
+          return;
+        }
+        // 非零退出是常规控制流(文件不存在、空仓库等),交给调用点判断。
+        resolve({ stdout: out, code: typeof code === "number" ? code : 1, stderr: err });
+      },
+    );
+  });
+}
+
+async function requireGit(cwd: string, args: readonly string[], env?: Record<string, string>): Promise<Buffer> {
+  const res = await runGit(cwd, args, env);
+  if (res.code !== 0) {
+    throw new FileLibError(500, "git_failed", `git ${args[0] ?? ""} failed: ${res.stderr.trim()}`);
+  }
+  return res.stdout;
+}
+
+async function requireGitBare(cwd: string, args: readonly string[]): Promise<Buffer> {
+  const res = await runGitBare(cwd, args);
+  if (res.code !== 0) {
+    throw new FileLibError(500, "git_failed", `git ${args[0] ?? ""} failed: ${res.stderr.trim()}`);
+  }
+  return res.stdout;
+}
+
+/**
+ * S4:同仓库写操作串行化。git 的并发写会在 index.lock 上打架,
+ * 串行化把它变成干净的 conflict 返回值而不是锁错误。仅进程内有效(ADR-0030)。
+ */
+function createKeySerializer(): <T>(key: string, fn: () => Promise<T>) => Promise<T> {
+  const tails = new Map<string, Promise<unknown>>();
+  return <T>(key: string, fn: () => Promise<T>): Promise<T> => {
+    const prev = tails.get(key) ?? Promise.resolve();
+    const next = prev.then(fn, fn);
+    tails.set(key, next.catch(() => undefined));
+    return next;
+  };
+}
+
+/**
+ * 仓库内相对路径的再校验。fileService.validateFilePath 已经把过一遍,
+ * 但 ADR-0030 把这条从卫生升级为安全边界 —— 本层不信调用方。
+ */
+function safeRelPath(filePath: string): string {
+  const normalized = filePath.normalize("NFC");
+  if (normalized === "" || path.isAbsolute(normalized) || normalized.includes("\\")) {
+    throw new FileLibError(400, "invalid_path", `unsafe path: ${filePath}`);
+  }
+  const segments = normalized.split("/");
+  for (const segment of segments) {
+    if (segment === "" || segment === "." || segment === ".." || segment === ".git") {
+      throw new FileLibError(400, "invalid_path", `unsafe path segment in: ${filePath}`);
+    }
+  }
+  // 解析后必须仍在仓库内(符号链接由 git 自身不跟随 + 此处前缀检查共同兜住)。
+  const resolved = path.posix.normalize(normalized);
+  if (resolved.startsWith("..") || path.isAbsolute(resolved)) {
+    throw new FileLibError(400, "invalid_path", `unsafe path: ${filePath}`);
+  }
+  return resolved;
+}
+
+/**
+ * 提交者身份 → git author/committer。
+ * name = displayName(缺失回退 userId);email = `<userId>@filelib.paradigm-edu.net`。
+ * email 用 userId 而不用 displayName:昵称会改,身份追溯不能跟着漂。
+ * name 里的换行/`<`/`>` 必须清掉 —— 它们会破坏 git 的 ident 行格式。
+ */
+function authorEnv(author: CommitAuthor | undefined): Record<string, string> {
+  const rawName = author?.displayName;
+  const fallback = author?.userId ?? FALLBACK_AUTHOR;
+  const name = (rawName === undefined || rawName.trim() === "" ? fallback : rawName.trim())
+    .replace(/[<>\n\r]/g, " ")
+    .trim();
+  const localPart = (author?.userId ?? FALLBACK_AUTHOR).replace(/[^\w.-]/g, "_");
+  const email = `${localPart}@${AUTHOR_EMAIL_DOMAIN}`;
+  return {
+    GIT_AUTHOR_NAME: name === "" ? FALLBACK_AUTHOR : name,
+    GIT_AUTHOR_EMAIL: email,
+    GIT_COMMITTER_NAME: name === "" ? FALLBACK_AUTHOR : name,
+    GIT_COMMITTER_EMAIL: email,
+  };
+}
+
+export function createGitVersionStore(): VersionStore {
+  const serialize = createKeySerializer();
+
+  /**
+   * 未 init → repo_not_found。
+   * 不能用 `git rev-parse --git-dir`:repoArgs 已把 --git-dir 钉死,rev-parse 会
+   * 原样回显它而不验证存在;而不钉死时它又会向上找到外层仓库。所以直接
+   * 测文件系统:项目目录里必须有属于它自己的 `.git`。
+   */
+  async function requireRepo(projectDir: string): Promise<void> {
+    try {
+      await access(path.join(projectDir, ".git"));
+    } catch {
+      throw new FileLibError(404, "repo_not_found", `repository not initialized: ${projectDir}`);
+    }
+  }
+
+  /** 该路径在 HEAD 上的当前版本;不存在(或从未提交)→ null。 */
+  async function currentVersion(projectDir: string, filePath: string): Promise<VersionId | null> {
+    const exists = await runGit(projectDir, ["cat-file", "-e", `HEAD:${filePath}`]);
+    if (exists.code !== 0) return null; // 空仓库、已删除、或从无此文件
+    const log = await runGit(projectDir, ["log", "-1", "--format=%H", "--", filePath]);
+    if (log.code !== 0) return null;
+    const hash = log.stdout.toString("utf8").trim();
+    return hash === "" ? null : hash;
+  }
+
+  async function headVersion(projectDir: string, filePath: string): Promise<VersionId> {
+    const version = await currentVersion(projectDir, filePath);
+    if (version === null) {
+      throw new FileLibError(404, "file_not_found", `file not found: ${filePath}`);
+    }
+    return version;
+  }
+
+  /** commit id 必须存在,否则 version_not_found(而非把 git 错误透出去)。 */
+  async function requireCommit(projectDir: string, version: VersionId): Promise<void> {
+    const res = await runGit(projectDir, ["rev-parse", "--verify", "--quiet", `${version}^{commit}`]);
+    if (res.code !== 0) {
+      throw new FileLibError(404, "version_not_found", `version not found: ${version}`);
+    }
+  }
+
+  /** 提交暂存区里已备好的单个路径。返回新 commit hash。 */
+  async function commitPath(
+    projectDir: string,
+    filePath: string,
+    message: string,
+    author: CommitAuthor | undefined,
+  ): Promise<VersionId> {
+    const env = authorEnv(author);
+    await requireGit(projectDir, ["commit", "--quiet", "--allow-empty", "-m", message, "--", filePath], env);
+    const hash = await requireGit(projectDir, ["rev-parse", "HEAD"]);
+    return hash.toString("utf8").trim();
+  }
+
+  return {
+    /** S7 幂等:已有仓库就不重建。 */
+    async init(projectDir) {
+      await serialize(projectDir, async () => {
+        await mkdir(projectDir, { recursive: true });
+        try {
+          await access(path.join(projectDir, ".git"));
+          return; // 已是仓库,不清空
+        } catch { /* 继续 init */ }
+        // init 用 runGitBare:此时 .git 尚不存在,钉 --git-dir 反而会让 git 报错。
+        await requireGitBare(projectDir, ["init", "--quiet"]);
+        // 默认分支名不依赖宿主 git 版本/配置(全局配置已被隔离)。
+        await requireGit(projectDir, ["symbolic-ref", "HEAD", "refs/heads/main"]);
+      });
+    },
+
+    async list(projectDir, prefix) {
+      await requireRepo(projectDir);
+      const res = await runGit(projectDir, ["ls-tree", "-r", "-l", "-z", "HEAD"]);
+      if (res.code !== 0) return []; // 空仓库(无 HEAD)
+      const out: FileEntry[] = [];
+      for (const record of res.stdout.toString("utf8").split("\0")) {
+        if (record === "") continue;
+        // 形如:"<mode> <type> <object> <size>\t<path>"
+        const tab = record.indexOf("\t");
+        if (tab === -1) continue;
+        const meta = record.slice(0, tab).split(/\s+/);
+        const entryPath = record.slice(tab + 1);
+        if (meta[1] !== "blob") continue;
+        if (prefix !== undefined && !entryPath.startsWith(prefix)) continue;
+        out.push({ path: entryPath, size: Number.parseInt(meta[3] ?? "0", 10) || 0 });
+      }
+      return out.sort((a, b) => a.path.localeCompare(b.path));
+    },
+
+    async head(projectDir, filePath) {
+      await requireRepo(projectDir);
+      return headVersion(projectDir, safeRelPath(filePath));
+    },
+
+    async read(projectDir, filePath, at) {
+      await requireRepo(projectDir);
+      const rel = safeRelPath(filePath);
+      if (at === undefined) {
+        await headVersion(projectDir, rel); // 存在性 → 404 file_not_found
+        const res = await runGit(projectDir, ["show", `HEAD:${rel}`]);
+        if (res.code !== 0) {
+          throw new FileLibError(404, "file_not_found", `file not found: ${rel}`);
+        }
+        return res.stdout;
+      }
+      await requireCommit(projectDir, at);
+      const res = await runGit(projectDir, ["show", `${at}:${rel}`]);
+      if (res.code !== 0) {
+        // commit 存在但该版本里没有这个路径。
+        throw new FileLibError(404, "version_not_found", `version not found: ${rel}@${at}`);
+      }
+      return res.stdout;
+    },
+
+    async commit(projectDir, filePath, req: CommitRequest): Promise<CommitResult> {
+      const rel = safeRelPath(filePath);
+      return serialize(projectDir, async (): Promise<CommitResult> => {
+        await requireRepo(projectDir);
+        const current = await currentVersion(projectDir, rel);
+
+        // S2:baseVersion=null 表新建,已存在即 conflict;
+        // S1:否则要求 baseVersion 精确等于当前版本。
+        if (req.baseVersion === null) {
+          if (current !== null) return { status: "conflict", currentVersion: current };
+        } else if (req.baseVersion !== current) {
+          return { status: "conflict", currentVersion: current ?? req.baseVersion };
+        }
+
+        const abs = path.join(projectDir, rel);
+        await mkdir(path.dirname(abs), { recursive: true });
+        await writeFile(abs, req.content);
+        await requireGit(projectDir, ["add", "--", rel]);
+        const message = req.message ?? (req.baseVersion === null ? `create ${rel}` : `update ${rel}`);
+        const version = await commitPath(projectDir, rel, message, req.author);
+        return { status: "ok", version };
+      });
+    },
+
+    async remove(projectDir, filePath, baseVersion, author): Promise<CommitResult> {
+      const rel = safeRelPath(filePath);
+      return serialize(projectDir, async (): Promise<CommitResult> => {
+        await requireRepo(projectDir);
+        const current = await currentVersion(projectDir, rel);
+        if (current === null) {
+          throw new FileLibError(404, "file_not_found", `file not found: ${rel}`);
+        }
+        if (baseVersion !== current) return { status: "conflict", currentVersion: current };
+        await requireGit(projectDir, ["rm", "--quiet", "--", rel]);
+        const version = await commitPath(projectDir, rel, `remove ${rel}`, author);
+        return { status: "ok", version };
+      });
+    },
+
+    async diff(projectDir, filePath, from, to) {
+      await requireRepo(projectDir);
+      const rel = safeRelPath(filePath);
+      await requireCommit(projectDir, from);
+      await requireCommit(projectDir, to);
+      const res = await runGit(projectDir, ["diff", from, to, "--", rel]);
+      if (res.code !== 0) {
+        throw new FileLibError(500, "git_failed", `git diff failed: ${res.stderr.trim()}`);
+      }
+      return res.stdout.toString("utf8");
+    },
+
+    async history(projectDir, filePath, limit) {
+      await requireRepo(projectDir);
+      const rel = safeRelPath(filePath);
+      const args = ["log", "--format=%H%x1f%an%x1f%aI%x1f%s%x1e"];
+      if (limit !== undefined) args.push(`-${limit}`);
+      args.push("--", rel);
+      const res = await runGit(projectDir, args);
+      if (res.code !== 0) return []; // 空仓库
+      const out: VersionInfo[] = [];
+      for (const record of res.stdout.toString("utf8").split("\x1e")) {
+        const line = record.trim();
+        if (line === "") continue;
+        const [version, author, committedAt, message] = line.split("\x1f");
+        if (version === undefined) continue;
+        out.push({
+          version,
+          message: message ?? "",
+          author: author === undefined || author === "" ? undefined : author,
+          committedAt: committedAt ?? "",
+        });
+      }
+      return out; // git log 已是新→旧
+    },
+
+    async projectHistory(projectDir, limit) {
+      await requireRepo(projectDir);
+      // %x1e 放在 format 开头作为每条记录的分隔符；--name-only 的文件列表跟在 format 行之后。
+      const args = ["log", "--format=%x1e%H%x1f%an%x1f%aI%x1f%s", "--name-only"];
+      if (limit !== undefined) args.push(`-${limit}`);
+      const res = await runGit(projectDir, args);
+      if (res.code !== 0) return []; // 空仓库
+      const out: ProjectCommitInfo[] = [];
+      // split 按 \x1e 分块，第一个空块跳过。
+      for (const block of res.stdout.toString("utf8").split("\x1e")) {
+        const trimmed = block.trim();
+        if (trimmed === "") continue;
+        const lines = trimmed.split("\n");
+        const header = lines[0];
+        if (header === undefined) continue;
+        const [version, author, committedAt, message] = header.split("\x1f");
+        if (version === undefined) continue;
+        // header 之后的非空行是受影响的文件路径。
+        // git 对含特殊字符的路径加双引号，去掉外层引号即可。
+        const files = lines.slice(1)
+          .map((l) => l.trim())
+          .filter((l) => l !== "")
+          .map((l) => (l.startsWith('"') && l.endsWith('"') ? l.slice(1, -1) : l));
+        out.push({
+          version,
+          message: message ?? "",
+          author: author === undefined || author === "" ? undefined : author,
+          committedAt: committedAt ?? "",
+          files,
+        });
+      }
+      return out;
+    },
+  };
+}
@@ -25,16 +25,24 @@ export interface GrantDto {
  readonly id: string;
  readonly principalType: "USER" | "GROUP";
  readonly principalId: string;
+  /**
+   * 展示名(ADR-0029:后端负责把 id 解析成人看的名字,前端不二次查询)。
+   * USER → `User.displayName`;GROUP → `MemberGroup.name`;
+   * 取不到行(用户/组已删)时回落为 principalId,与 `/database/api/me` 同一回落语义。
+   * 纯展示字段:写路径仍只认 principalId,不得用它做任何授权判断。
+   */
+  readonly principalName: string;
  readonly role: FileLibRole;
  readonly isCreatorGrant: boolean;
  readonly createdAt: Date;
 }

-function toDto(grant: FileLibGrant): GrantDto {
+function toDto(grant: FileLibGrant, principalName?: string): GrantDto {
  return {
    id: grant.id,
    principalType: grant.principalType,
    principalId: grant.principalId,
+    principalName: principalName ?? grant.principalId,
    role: grant.role,
    isCreatorGrant: grant.isCreatorGrant,
    createdAt: grant.createdAt,
@@ -44,6 +52,35 @@ function toDto(grant: FileLibGrant): GrantDto {
 type Tx = Prisma.TransactionClient;
 type Deps = AccessDeps & { readonly prisma: PrismaClient };

+/**
+ * 批量解析 principal 展示名(两条 IN 查询,不做 N+1)。
+ * 组不按 archivedAt 过滤:已归档组的历史授权仍要能显示出名字来给管理员收回。
+ */
+async function resolvePrincipalNames(
+  tx: Tx | PrismaClient,
+  grants: readonly FileLibGrant[],
+): Promise<ReadonlyMap<string, string>> {
+  const userIds = [...new Set(grants.filter((g) => g.principalType === "USER").map((g) => g.principalId))];
+  const groupIds = [...new Set(grants.filter((g) => g.principalType === "GROUP").map((g) => g.principalId))];
+  const [users, groups] = await Promise.all([
+    userIds.length === 0
+      ? Promise.resolve([])
+      : tx.user.findMany({ where: { id: { in: userIds } }, select: { id: true, displayName: true } }),
+    groupIds.length === 0
+      ? Promise.resolve([])
+      : tx.memberGroup.findMany({ where: { id: { in: groupIds } }, select: { id: true, name: true } }),
+  ]);
+  const names = new Map<string, string>();
+  for (const u of users) names.set(`USER:${u.id}`, u.displayName);
+  for (const g of groups) names.set(`GROUP:${g.id}`, g.name);
+  return names;
+}
+
+async function toDtosWithNames(tx: Tx | PrismaClient, grants: readonly FileLibGrant[]): Promise<readonly GrantDto[]> {
+  const names = await resolvePrincipalNames(tx, grants);
+  return grants.map((g) => toDto(g, names.get(`${g.principalType}:${g.principalId}`)));
+}
+
 /** MANAGE 门禁:带 tx 时用调用方事务(与后续写同绳),不带时自开一个。 */
 async function requireManage(
  deps: Deps,
@@ -66,7 +103,7 @@ export async function listGrants(
    where: { organizationId: deps.organizationId, nodeId, revokedAt: null },
    orderBy: [{ isCreatorGrant: "desc" }, { createdAt: "asc" }],
  });
-  return grants.map(toDto);
+  return toDtosWithNames(deps.prisma, grants);
 }

 export interface PutGrantsResult {
@@ -137,7 +174,7 @@ export async function putGrants(
      where: { organizationId: deps.organizationId, nodeId: node.id, revokedAt: null },
      orderBy: [{ isCreatorGrant: "desc" }, { createdAt: "asc" }],
    });
-    return { granted, updated, grants: grants.map(toDto) };
+    return { granted, updated, grants: await toDtosWithNames(tx, grants) };
  });
 }

@@ -236,7 +273,7 @@ export async function forceAdjustGrants(
      where: { organizationId: deps.organizationId, nodeId: node.id, revokedAt: null },
      orderBy: [{ isCreatorGrant: "desc" }, { createdAt: "asc" }],
    });
-    return { granted, updated, grants: grants.map(toDto) };
+    return { granted, updated, grants: await toDtosWithNames(tx, grants) };
  });
 }

@@ -43,5 +43,7 @@ export async function requireFileLibActor(
  return {
    userId: auth.user.id,
    isWebsiteAdmin: WEBSITE_ADMIN_ROLES.includes(membership.role),
+    // 仅用于 commit message 的【用户名】;权限判定一律走 userId。
+    displayName: auth.user.displayName,
  };
 }
@@ -21,6 +21,8 @@ export interface FileLibRouteDeps {
  readonly groupResolver: GroupResolver;
  readonly versionStore: VersionStore;
  readonly exportAdapters: readonly ExportAdapter[];
+  /** 单文件字节上限(`HUB_FILELIB_MAX_FILE_BYTES`)。 */
+  readonly maxFileBytes: number;
 }

 /** 组装 treeService 依赖(路由处理内直接使用)。 */
@@ -35,6 +35,11 @@ export interface FileLibActor {
  readonly userId: string;
  /** silo org OWNER/ADMIN(契约 C4 适配)。仅 root 创建/force_adjust 用,不给读旁路。 */
  readonly isWebsiteAdmin: boolean;
+  /**
+   * 展示名(飞书昵称)。只用于生成 commit message 的【用户名】部分;
+   * 权限判定一律用 userId。缺失时回退到 userId。
+   */
+  readonly displayName?: string | undefined;
 }

 export interface TreeServiceDeps {
@@ -229,6 +234,8 @@ export async function createNode(
    }

    if (input.kind === "PROJECT") {
+      // ADR-0030:项目扁平居于同一根下、以 uuid 命名;名字不进路径(所以 rename
+      // 不动磁盘)。FOLDER 永不赋值 —— 文件夹不落盘,只存在于 DB 的 parentId/pathIds。
      storageDir = path.join(deps.storageRoot, id);
    }

@@ -308,6 +315,7 @@ export async function createNode(
  });

  // provisioning 状态机(Metis 风险#1):DB 行已持久,init 失败 → FAILED 可重试/对账。
+  // ADR-0030:这一步真的建目录并 `git init`;宿主无 git 则此处 provision_failed。
  if (input.kind === "PROJECT" && storageDir !== null) {
    try {
      await deps.versionStore.init(storageDir);
@@ -1,12 +1,14 @@
 /**
- * VersionStore port(契约 C1)+ 开发用内存实现。
+ * VersionStore port(契约 C1)+ **仅测试用**的内存实现。
 *
- * 版本团队交付 npm 工具包后,用同一接口替换 createInMemoryVersionStore。
+ * 生产实现是 `gitVersionStore.ts`(一项目一 git 仓库,VersionId = commit hash),
+ * 见 ADR-0030。本文件留下来只为让不关心版本落盘的测试快速起个 store;它的
+ * VersionId 是每仓库计数器(`v1`/`v2`),与生产**不同形**,不要据此写断言。
 * 语义红线(计划"Mock 保真红线"):冲突走返回值(S1)、baseVersion=null 表新建(S2)、
 * init 幂等(S7)、同 projectDir 写操作串行化(S4)、文件级版本(D16)。
 *
- * 持久化:传 persistPath 时把仓库快照落盘(JSON),重启后恢复 —— 纯粹为开发期
- * demo 稳定,不改变任何语义;生产由真包替换,此文件不参与。
+ * 持久化:传 persistPath 时把仓库快照落盘(JSON),重启后恢复。ADR-0030 之后
+ * 已无生产调用点 —— 生产走 git,不再有这份进程级 JSON 快照。
 */

 import { mkdirSync, readFileSync, renameSync, writeFileSync } from "node:fs";
@@ -15,12 +17,21 @@ import { FileLibError } from "./model.js";

 export type VersionId = string;

+/**
+ * 提交者身份。`userId` 是稳定主键(追溯用),`displayName` 只影响展示。
+ * git 实现把它们映射成 `name <userId@域名>`(ADR-0030)。
+ */
+export interface CommitAuthor {
+  readonly userId: string;
+  readonly displayName?: string | undefined;
+}
+
 export interface CommitRequest {
  /** 编辑起始版本;null 表示新建文件(已存在则 conflict,S2)。 */
  readonly baseVersion: VersionId | null;
  readonly content: string | Buffer;
  readonly message?: string | undefined;
-  readonly author?: string | undefined;
+  readonly author?: CommitAuthor | undefined;
 }

 export type CommitResult =
@@ -34,6 +45,16 @@ export interface VersionInfo {
  readonly committedAt: string;
 }

+/** 项目级提交历史条目(包含受影响文件路径)。 */
+export interface ProjectCommitInfo {
+  readonly version: VersionId;
+  readonly message: string;
+  readonly author: string | undefined;
+  readonly committedAt: string;
+  /** 本次提交修改的文件路径列表。 */
+  readonly files: readonly string[];
+}
+
 export interface FileEntry {
  readonly path: string;
  readonly size: number;
@@ -45,9 +66,17 @@ export interface VersionStore {
  head(projectDir: string, filePath: string): Promise<VersionId>;
  read(projectDir: string, filePath: string, at?: VersionId): Promise<Buffer>;
  commit(projectDir: string, filePath: string, req: CommitRequest): Promise<CommitResult>;
-  remove(projectDir: string, filePath: string, baseVersion: VersionId): Promise<CommitResult>;
+  /** 删除也是一次提交,所以同样带提交者身份。 */
+  remove(
+    projectDir: string,
+    filePath: string,
+    baseVersion: VersionId,
+    author?: CommitAuthor,
+  ): Promise<CommitResult>;
  diff(projectDir: string, filePath: string, from: VersionId, to: VersionId): Promise<string>;
  history(projectDir: string, filePath: string, limit?: number): Promise<VersionInfo[]>;
+  /** 项目级提交历史(所有文件),新→旧排列。 */
+  projectHistory(projectDir: string, limit?: number): Promise<ProjectCommitInfo[]>;
 }

 interface StoredVersion {
@@ -80,6 +109,13 @@ function toBuffer(content: string | Buffer): Buffer {
  return typeof content === "string" ? Buffer.from(content, "utf8") : content;
 }

+/** VersionInfo.author 是展示字符串;语义与 git 实现对齐(取 displayName,回退 userId)。 */
+function authorLabel(author: CommitAuthor | undefined): string | undefined {
+  if (author === undefined) return undefined;
+  const name = author.displayName;
+  return name === undefined || name.trim() === "" ? author.userId : name.trim();
+}
+
 /** 极简 unified-diff(mock 保真够用;真包的 diff 以版本团队为准)。 */
 function naiveDiff(fromText: string, toText: string): string {
  const a = fromText.split("\n");
@@ -221,7 +257,7 @@ export function createInMemoryVersionStore(persistPath?: string): VersionStore {
          version,
          content: toBuffer(req.content),
          message: req.message ?? `commit ${version}`,
-          author: req.author,
+          author: authorLabel(req.author),
          committedAt: new Date().toISOString(),
          deleted: false,
        });
@@ -231,7 +267,7 @@ export function createInMemoryVersionStore(persistPath?: string): VersionStore {
      });
    },

-    async remove(projectDir, filePath, baseVersion) {
+    async remove(projectDir, filePath, baseVersion, author) {
      return serialize(projectDir, async (): Promise<CommitResult> => {
        const repo = requireRepo(projectDir);
        const chain = repo.files.get(filePath) ?? [];
@@ -247,7 +283,7 @@ export function createInMemoryVersionStore(persistPath?: string): VersionStore {
          version,
          content: Buffer.alloc(0),
          message: `remove ${filePath}`,
-          author: undefined,
+          author: authorLabel(author),
          committedAt: new Date().toISOString(),
          deleted: true,
        });
@@ -276,5 +312,24 @@ export function createInMemoryVersionStore(persistPath?: string): VersionStore {
      const ordered = infos.reverse();
      return limit !== undefined ? ordered.slice(0, limit) : ordered;
    },
+
+    async projectHistory(projectDir, limit) {
+      const repo = requireRepo(projectDir);
+      // 汇集所有文件的所有版本，按提交时间新→旧排序。
+      const all: ProjectCommitInfo[] = [];
+      for (const [filePath, chain] of repo.files) {
+        for (const v of chain) {
+          all.push({
+            version: v.version,
+            message: v.message,
+            author: v.author,
+            committedAt: v.committedAt,
+            files: [filePath],
+          });
+        }
+      }
+      all.sort((a, b) => b.committedAt.localeCompare(a.committedAt));
+      return limit !== undefined ? all.slice(0, limit) : all;
+    },
  };
 }
@@ -29,10 +29,11 @@ import { registerFileLibRoutes } from "./filelibRoutes.js";
 import { registerFileRoutes } from "./fileRoutes.js";
 import { registerMemberGroupRoutes } from "./memberGroupRoutes.js";
 import { registerTeacherApp } from "./teacherApp.js";
-import { createInMemoryVersionStore } from "../filelib/versionStore.js";
+import { createGitVersionStore } from "../filelib/gitVersionStore.js";
+import { resolveMaxFileBytes } from "../filelib/fileService.js";
 import { createMemberGroupResolver } from "../filelib/memberGroupResolver.js";
 import { createHttpGroupResolver } from "../filelib/groupResolverHttp.js";
-import { createManifestStubAdapter } from "../filelib/exportService.js";
+import { createCphPdfAdapter, createManifestStubAdapter } from "../filelib/exportService.js";
 import { FILE_LIB_AUDIT_ACTIONS } from "../filelib/audit.js";
 import { actorOrNull, sendRouteError } from "../filelib/routeShared.js";
 import type { FileLibRouteDeps } from "../filelib/routeShared.js";
@@ -60,6 +61,8 @@ export async function registerDatabaseRoutes(
  app.get("/database/config", async () => ({
    orgSlug: config.siloOrganizationSlug,
    devLoginEnabled: config.allowDevLoginBypass,
+    // 上传上限由后端下发,前端不再写死 —— 两处各自硬编码会随配置漂。
+    maxFileBytes: resolveMaxFileBytes(),
  }));

  // 概览页统计。登录 + silo org OWNER/ADMIN 才给 —— 它聚合的是全 org 口径的
@@ -132,7 +135,8 @@ export async function registerDatabaseRoutes(
  }

  // 文件库(独立模块,《文件库-接口契约.md》):API + 老师端 /app 静态托管。
-  // 依赖装配:VersionStore 当前为内存+快照实现(版本团队 npm 包到位后替换);
+  // 依赖装配:VersionStore 是真 git —— 一项目一仓库 <storageRoot>/<nodeId>,
+  // VersionId = commit hash(ADR-0030);
  // GroupResolver 默认读 in-hub MemberGroup 闭包(ADR-0028),
  // HUB_GROUP_SERVICE_URL 配置后切 HTTP(C2);
  // 导出适配器当前为 manifest stub(OPEN-6,真导出工具到位后替换)。
@@ -145,7 +149,7 @@ export async function registerDatabaseRoutes(
    return;
  }
  const storageRoot = process.env["HUB_FILELIB_STORAGE_ROOT"] ?? path.resolve(".filelib-repos");
-  const versionStore = createInMemoryVersionStore(path.join(storageRoot, ".version-store.json"));
+  const versionStore = createGitVersionStore();
  const groupServiceUrl = process.env["HUB_GROUP_SERVICE_URL"];
  const filelibDeps: FileLibRouteDeps = {
    prisma: config.prisma,
@@ -156,7 +160,8 @@ export async function registerDatabaseRoutes(
      ? createMemberGroupResolver(config.prisma)
      : createHttpGroupResolver({ baseUrl: groupServiceUrl }),
    versionStore,
-    exportAdapters: [createManifestStubAdapter(versionStore)],
+    exportAdapters: [createCphPdfAdapter(), createManifestStubAdapter(versionStore)],
+    maxFileBytes: resolveMaxFileBytes(),
  };
  await registerFileLibRoutes(app, filelibDeps);
  await registerFileRoutes(app, filelibDeps);
@@ -10,6 +10,7 @@ import {
  diffFile,
  fileHistory,
  listFiles,
+  projectHistory,
  readFile,
  readFileRaw,
  type FileContentEncoding,
@@ -39,6 +40,7 @@ export async function registerFileRoutes(
    organizationId: deps.organizationId,
    groupResolver: deps.groupResolver,
    versionStore: deps.versionStore,
+    maxFileBytes: deps.maxFileBytes,
  };
  const exportDeps = { ...fileDeps, adapters: deps.exportAdapters };

@@ -182,6 +184,22 @@ export async function registerFileRoutes(
    }
  });

+  app.get("/database/api/projects/:id/history", async (request, reply) => {
+    const actor = await actorOrNull(request, reply, deps);
+    if (actor === null) return reply;
+    try {
+      const { id } = request.params as { id: string };
+      const rawLimit = (request.query as { limit?: string }).limit;
+      const limit = rawLimit === undefined ? undefined : Number.parseInt(rawLimit, 10);
+      if (limit !== undefined && (!Number.isSafeInteger(limit) || limit <= 0)) {
+        throw new FileLibError(400, "invalid_request", "limit must be a positive integer");
+      }
+      return { history: await projectHistory(fileDeps, actor, id, limit) };
+    } catch (error) {
+      return sendRouteError(reply, error);
+    }
+  });
+
  /* ------------------------------------------------------------ 导出(D10 异步) */

  app.post("/database/api/projects/:id/exports", async (request, reply) => {
@@ -224,9 +242,13 @@ export async function registerFileRoutes(
    try {
      const { jobId } = request.params as { jobId: string };
      const artifact = await downloadExport(exportDeps, actor, jobId);
+      // PDF 报真实 MIME,浏览器才能内联预览/正确命名;其余产物保守为二进制流。
+      const contentType = artifact.filename.toLowerCase().endsWith(".pdf")
+        ? "application/pdf"
+        : "application/octet-stream";
      return reply
        .header("Content-Disposition", `attachment; filename="${artifact.filename}"`)
-        .type("application/octet-stream")
+        .type(contentType)
        .send(artifact.content);
    } catch (error) {
      return sendRouteError(reply, error);
@@ -54,6 +54,7 @@ beforeEach(async () => {
    groupResolver: createStaticGroupResolver({}),
    versionStore,
    exportAdapters: [createManifestStubAdapter(versionStore)],
+    maxFileBytes: 10 * 1024 * 1024,
  };
  app = Fastify({ logger: false });
  await app.register(fastifyCookie);
@@ -149,6 +150,42 @@ describe("filelib http · 8.1 授权矩阵", () => {
    expect(revoke.statusCode).toBe(403);
    expect(revoke.json().error.code).toBe("cannot_touch_creator");
  });
+
+  it("grants 返回 principalName:USER→displayName / GROUP→组名;取不到行时回落为 id", async () => {
+    const rootId = await createRoot(ADMIN_COOKIE());
+    const group = await prisma.memberGroup.create({ data: { name: "物理组" } });
+
+    const put = await app.inject({
+      method: "PUT", url: `/database/api/nodes/${rootId}/grants`,
+      headers: { cookie: ADMIN_COOKIE() },
+      payload: {
+        grants: [
+          { principalType: "USER", principalId: "u_alice", role: "EDIT" },
+          { principalType: "GROUP", principalId: group.id, role: "VIEW" },
+          // 数据库里没有对应 User 行(已删/脏数据)→ 回落为 principalId
+          { principalType: "USER", principalId: "u_ghost", role: "VIEW" },
+        ],
+      },
+    });
+    expect(put.statusCode).toBe(200);
+
+    const list = await app.inject({
+      method: "GET", url: `/database/api/nodes/${rootId}/grants`,
+      headers: { cookie: ADMIN_COOKIE() },
+    });
+    expect(list.statusCode).toBe(200);
+    const byPrincipal = new Map<string, string>(
+      list.json().grants.map((g: { principalId: string; principalName: string }) => [g.principalId, g.principalName]),
+    );
+    expect(byPrincipal.get("u_alice")).toBe("Alice");
+    expect(byPrincipal.get(group.id)).toBe("物理组");
+    expect(byPrincipal.get("u_ghost")).toBe("u_ghost");
+    // 创建者授权也要解析出名字
+    const creator = list.json().grants.find((g: { isCreatorGrant: boolean }) => g.isCreatorGrant);
+    expect(creator.principalName).toBe("Admin");
+    // PUT 响应与 GET 同形状
+    expect(put.json().grants.every((g: { principalName?: string }) => typeof g.principalName === "string")).toBe(true);
+  });
 });

 describe("filelib http · 文件冲突流", () => {
@@ -0,0 +1,73 @@
+/**
+ * 单文件上限的环境变量解析 + commit message 默认文案。
+ *
+ * 上限:`HUB_FILELIB_MAX_FILE_BYTES` 覆盖,缺省 10MiB;非法值按缺省 ——
+ * 配置写错不该让上传静默变成 0 上限(那会把每次上传都拒掉)。
+ * 文案:`【用户名】修改了【路径】`,用户名取 displayName、缺失回退 userId。
+ */
+import { describe, expect, it } from "vitest";
+import {
+  FILE_CONTENT_MAX_BYTES_DEFAULT,
+  defaultCommitMessage,
+  parseMaxFileBytes,
+} from "../../src/database/filelib/fileService.js";
+
+describe("parseMaxFileBytes", () => {
+  it("缺省 10MiB", () => {
+    expect(FILE_CONTENT_MAX_BYTES_DEFAULT).toBe(10 * 1024 * 1024);
+    expect(parseMaxFileBytes(undefined)).toBe(FILE_CONTENT_MAX_BYTES_DEFAULT);
+    expect(parseMaxFileBytes("")).toBe(FILE_CONTENT_MAX_BYTES_DEFAULT);
+    expect(parseMaxFileBytes("   ")).toBe(FILE_CONTENT_MAX_BYTES_DEFAULT);
+  });
+
+  it("合法正整数生效(可上调也可下调)", () => {
+    expect(parseMaxFileBytes("1048576")).toBe(1024 * 1024);
+    expect(parseMaxFileBytes(" 52428800 ")).toBe(50 * 1024 * 1024);
+    expect(parseMaxFileBytes("1")).toBe(1);
+  });
+
+  it("非法值一律回退缺省,不产生 0 或负数上限", () => {
+    for (const bad of ["0", "-1", "abc", "1.5", "NaN", "Infinity", "1e999", "10MB"]) {
+      expect(parseMaxFileBytes(bad)).toBe(FILE_CONTENT_MAX_BYTES_DEFAULT);
+    }
+  });
+});
+
+describe("defaultCommitMessage", () => {
+  it("【用户名】修改了【路径】,用户名取 displayName", () => {
+    expect(defaultCommitMessage({ userId: "u1", isWebsiteAdmin: false, displayName: "张老师" }, "讲义/第一课.md"))
+      .toBe("【张老师】修改了【讲义/第一课.md】");
+  });
+
+  it("displayName 缺失/空白时回退 userId", () => {
+    expect(defaultCommitMessage({ userId: "u_alice", isWebsiteAdmin: false }, "a.md"))
+      .toBe("【u_alice】修改了【a.md】");
+    expect(defaultCommitMessage({ userId: "u_alice", isWebsiteAdmin: false, displayName: "   " }, "a.md"))
+      .toBe("【u_alice】修改了【a.md】");
+  });
+});
+
+/**
+ * message 优先级的纯函数复刻(commitFile 里的那三行):
+ * 非空则用调用方的,否则回退默认文案。空串必须算“没传” ——
+ * `git commit -m ""` 会以 empty commit message 失败。
+ */
+function resolveMessage(input: string | undefined, fallback: string): string {
+  const trimmed = input?.trim();
+  return trimmed === undefined || trimmed === "" ? fallback : trimmed;
+}
+
+describe("commit message 优先级", () => {
+  const fallback = "【张老师】修改了【a.md】";
+
+  it("手填了就用手填的", () => {
+    expect(resolveMessage("补上第三课的课件", fallback)).toBe("补上第三课的课件");
+    expect(resolveMessage("  前后有空格  ", fallback)).toBe("前后有空格");
+  });
+
+  it("未传/空/约空白一律回退默认文案", () => {
+    for (const raw of [undefined, "", "   ", "\n\t"]) {
+      expect(resolveMessage(raw, fallback)).toBe(fallback);
+    }
+  });
+});
@@ -0,0 +1,303 @@
+/**
+ * 真 git VersionStore 语义单测(ADR-0030)。
+ *
+ * 与 filelib-version-store.test.ts(内存实现)逐条对齐同一份 C1 语义:
+ * S1/S2 冲突走返回值、S7 init 幂等、D16 文件级版本互不影响、S4 同仓库写串行。
+ * 差别只在 VersionId 是 commit hash 而非计数器 —— 断言因此不写死字面量。
+ *
+ * 每个用例一个真临时仓库,跑真 git;没有 mock。
+ */
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { mkdtemp, rm, readFile } from "node:fs/promises";
+import { existsSync } from "node:fs";
+import { execFileSync } from "node:child_process";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import { createGitVersionStore } from "../../src/database/filelib/gitVersionStore.js";
+import { FileLibError } from "../../src/database/filelib/model.js";
+
+const HEX40 = /^[0-9a-f]{40}$/;
+
+let root: string;
+let dir: string;
+const store = createGitVersionStore();
+
+beforeEach(async () => {
+  root = await mkdtemp(path.join(tmpdir(), "filelib-git-"));
+  dir = path.join(root, "11111111-2222-3333-4444-555555555555");
+});
+
+afterEach(async () => {
+  await rm(root, { recursive: true, force: true });
+});
+
+/** 取 ok 版本号;conflict 直接让用例失败(比 as 断言更早暴露问题)。 */
+function okVersion(result: { status: string; version?: string }): string {
+  expect(result.status).toBe("ok");
+  return result.version as string;
+}
+
+describe("GitVersionStore · C1 语义(ADR-0030)", () => {
+  it("init 建目录 + git init;幂等(S7);未 init → repo_not_found", async () => {
+    await expect(store.head(dir, "a.md")).rejects.toThrowError(FileLibError);
+    await store.init(dir);
+    expect(existsSync(path.join(dir, ".git"))).toBe(true);
+    await store.init(dir); // 幂等
+    const v1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "hello" }));
+    await store.init(dir); // 已有内容后再 init 不清空
+    expect(await store.head(dir, "a.md")).toBe(v1);
+    expect((await store.read(dir, "a.md")).toString()).toBe("hello");
+  });
+
+  it("VersionId 是 40 位 commit hash,且真的落到磁盘工作区", async () => {
+    await store.init(dir);
+    const v = okVersion(await store.commit(dir, "docs/a.md", { baseVersion: null, content: "内容" }));
+    expect(v).toMatch(HEX40);
+    // 工作区里是一个真文件(不只是 git 对象)。
+    expect(await readFile(path.join(dir, "docs/a.md"), "utf8")).toBe("内容");
+  });
+
+  it("对已存在文件再次『新建』 → conflict(S2)", async () => {
+    await store.init(dir);
+    const v1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "1" }));
+    expect(await store.commit(dir, "a.md", { baseVersion: null, content: "2" })).toEqual({
+      status: "conflict",
+      currentVersion: v1,
+    });
+  });
+
+  it("baseVersion 落后于当前 → conflict 并带 currentVersion(S1)", async () => {
+    await store.init(dir);
+    const v1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "1" }));
+    const v2 = okVersion(await store.commit(dir, "a.md", { baseVersion: v1, content: "2" }));
+    expect(await store.commit(dir, "a.md", { baseVersion: v1, content: "3" })).toEqual({
+      status: "conflict",
+      currentVersion: v2,
+    });
+  });
+
+  it("旧版本仍可按 hash 读回", async () => {
+    await store.init(dir);
+    const v1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "一" }));
+    await store.commit(dir, "a.md", { baseVersion: v1, content: "二" });
+    expect((await store.read(dir, "a.md", v1)).toString()).toBe("一");
+    expect((await store.read(dir, "a.md")).toString()).toBe("二");
+  });
+
+  it("D16 文件级版本:a.md 的提交不推进 b.md 的 base", async () => {
+    await store.init(dir);
+    const a1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "A1" }));
+    const b1 = okVersion(await store.commit(dir, "b.md", { baseVersion: null, content: "B1" }));
+    await store.commit(dir, "a.md", { baseVersion: a1, content: "A2" }); // 仓库 HEAD 前进
+    // b.md 仍以自己的版本为 base —— 这正是 commit 级 hash 做文件级版本的关键。
+    expect((await store.commit(dir, "b.md", { baseVersion: b1, content: "B2" })).status).toBe("ok");
+    expect(await store.head(dir, "b.md")).not.toBe(b1);
+  });
+
+  it("二进制内容原样往返(NUL 字节不被破坏)", async () => {
+    await store.init(dir);
+    const bytes = Buffer.from([0x00, 0x01, 0xff, 0x00, 0x7f]);
+    await store.commit(dir, "blob.bin", { baseVersion: null, content: bytes });
+    expect(Buffer.compare(await store.read(dir, "blob.bin"), bytes)).toBe(0);
+  });
+
+  it("remove:正确 base → ok;head 随后 404;stale/缺失 base → conflict/404", async () => {
+    await store.init(dir);
+    const v1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "1" }));
+    const v2 = okVersion(await store.commit(dir, "a.md", { baseVersion: v1, content: "2" }));
+    expect(await store.remove(dir, "a.md", v1)).toEqual({ status: "conflict", currentVersion: v2 });
+    const v3 = okVersion(await store.remove(dir, "a.md", v2));
+    await expect(store.head(dir, "a.md")).rejects.toThrowError(FileLibError);
+    expect(existsSync(path.join(dir, "a.md"))).toBe(false);
+    // 删除是一个 commit:旧版本内容仍可取回(ADR-0030)。
+    expect((await store.read(dir, "a.md", v1)).toString()).toBe("1");
+    expect(v3).toMatch(HEX40);
+    await expect(store.remove(dir, "a.md", v3)).rejects.toThrowError(FileLibError);
+  });
+
+  it("history 新→旧,支持 limit,author 取 displayName", async () => {
+    await store.init(dir);
+    const v1 = okVersion(
+      await store.commit(dir, "docs/a.md", {
+        baseVersion: null,
+        content: "1",
+        message: "初版",
+        author: { userId: "u1", displayName: "张老师" },
+      }),
+    );
+    await store.commit(dir, "docs/a.md", {
+      baseVersion: v1,
+      content: "2",
+      message: "二版",
+      author: { userId: "u2", displayName: "李老师" },
+    });
+    await store.commit(dir, "other/b.md", { baseVersion: null, content: "x" });
+    const h = await store.history(dir, "docs/a.md");
+    expect(h.map((v) => v.message)).toEqual(["二版", "初版"]);
+    expect(h.map((v) => v.author)).toEqual(["李老师", "张老师"]);
+    expect(h[0]?.version).toMatch(HEX40);
+    expect((await store.history(dir, "docs/a.md", 1)).map((v) => v.message)).toEqual(["二版"]);
+    // other/b.md 的提交不出现在 docs/a.md 的历史里。
+    expect(h).toHaveLength(2);
+  });
+
+  it("list 排除已删、按前缀过滤、空仓库返回空", async () => {
+    await store.init(dir);
+    expect(await store.list(dir)).toEqual([]);
+    await store.commit(dir, "docs/a.md", { baseVersion: null, content: "1" });
+    const bv = okVersion(await store.commit(dir, "other/b.md", { baseVersion: null, content: "xy" }));
+    expect((await store.list(dir)).map((f) => f.path)).toEqual(["docs/a.md", "other/b.md"]);
+    expect((await store.list(dir, "docs/")).map((f) => f.path)).toEqual(["docs/a.md"]);
+    expect((await store.list(dir)).find((f) => f.path === "other/b.md")?.size).toBe(2);
+    await store.remove(dir, "other/b.md", bv);
+    expect((await store.list(dir)).map((f) => f.path)).toEqual(["docs/a.md"]);
+  });
+
+  it("S4 同仓库写串行:并发同 base 提交,恰好一成一冲突", async () => {
+    await store.init(dir);
+    const v1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "1" }));
+    const [r1, r2] = await Promise.all([
+      store.commit(dir, "a.md", { baseVersion: v1, content: "x" }),
+      store.commit(dir, "a.md", { baseVersion: v1, content: "y" }),
+    ]);
+    expect([r1.status, r2.status].sort()).toEqual(["conflict", "ok"]);
+  });
+
+  it("目录不存在 → repo_not_found,不该报 git_missing", async () => {
+    // 回归:spawn 的 ENOENT 有两种来源且报错一模一样 —— git 不在 PATH 上,或 cwd 不存在。
+    // 早先把两者一律归为 git_missing,于是“项目目录没建过”会被误报成“git 没装”。
+    // 内存 store 时代建的旧项目就是这个形态:DB 有 storageDir,磁盘上什么都没有。
+    const missing = path.join(root, "never-created");
+    for (const op of [
+      () => store.head(missing, "a.md"),
+      () => store.list(missing),
+      () => store.read(missing, "a.md"),
+      () => store.commit(missing, "a.md", { baseVersion: null, content: "x" }),
+      () => store.remove(missing, "a.md", "0".repeat(40)),
+      () => store.history(missing, "a.md"),
+    ]) {
+      await expect(op()).rejects.toMatchObject({ code: "repo_not_found", statusCode: 404 });
+    }
+  });
+
+  it("目录存在但不是 git 仓库 → repo_not_found", async () => {
+    const { mkdir } = await import("node:fs/promises");
+    const plain = path.join(root, "plain-dir");
+    await mkdir(plain, { recursive: true });
+    await expect(store.head(plain, "a.md")).rejects.toMatchObject({ code: "repo_not_found" });
+  });
+
+  it("仍然能从零开始:init 会把缺失的目录建出来", async () => {
+    const deep = path.join(root, "a", "b", "c-uuid");
+    await store.init(deep);
+    expect((await store.commit(deep, "a.md", { baseVersion: null, content: "1" })).status).toBe("ok");
+  });
+
+  it("提交身份:name=displayName,email=<userId>@filelib.paradigm-edu.net", async () => {
+    await store.init(dir);
+    await store.commit(dir, "a.md", {
+      baseVersion: null,
+      content: "1",
+      author: { userId: "u_alice", displayName: "张老师" },
+    });
+    const ident = execFileSync("git", ["-C", dir, "log", "-1", "--format=%an|%ae|%cn|%ce"]).toString().trim();
+    expect(ident).toBe("张老师|u_alice@filelib.paradigm-edu.net|张老师|u_alice@filelib.paradigm-edu.net");
+  });
+
+  it("displayName 缺失时 name 回退 userId,email 仍用 userId", async () => {
+    await store.init(dir);
+    await store.commit(dir, "a.md", { baseVersion: null, content: "1", author: { userId: "u_bob" } });
+    expect(execFileSync("git", ["-C", dir, "log", "-1", "--format=%an|%ae"]).toString().trim())
+      .toBe("u_bob|u_bob@filelib.paradigm-edu.net");
+  });
+
+  it("displayName 里的 <>/换行不能破坏 git ident 行", async () => {
+    await store.init(dir);
+    await store.commit(dir, "a.md", {
+      baseVersion: null,
+      content: "1",
+      author: { userId: "u_x", displayName: "a <evil@e.com>\n换行" },
+    });
+    const out = execFileSync("git", ["-C", dir, "log", "-1", "--format=%an|%ae"]).toString().trim();
+    const [name, email] = out.split("|");
+    // 断言性质而不是具体空白(git 自己还会压缩 ident 里的空白)。
+    expect(name).not.toContain("<");
+    expect(name).not.toContain(">");
+    expect(name).not.toContain("\n");
+    expect(name).toContain("换行");
+    expect(email).toBe("u_x@filelib.paradigm-edu.net");
+  });
+
+  it("删除提交也带提交者身份", async () => {
+    await store.init(dir);
+    const v = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "1" }));
+    okVersion(await store.remove(dir, "a.md", v, { userId: "u_del", displayName: "删除者" }));
+    expect(execFileSync("git", ["-C", dir, "log", "-1", "--format=%an|%ae"]).toString().trim())
+      .toBe("删除者|u_del@filelib.paradigm-edu.net");
+  });
+
+  it("storage root 在另一个 git 仓库内时,不得落到外层仓库上", async () => {
+    // 回归:早先用 `git rev-parse --git-dir` 判定“是否已 init”,而 git 会沿目录树
+    // **向上**找 `.git`。本地开发的默认 storage root 就是 `hub/.filelib-repos`,
+    // 在本 repo 内 —— 于是未 init 的项目目录被误判为“已是仓库”,后续命令全部
+    // 落到外层源码仓上(表现为 `git add` 报 “paths are ignored by .gitignore”)。
+    const outer = path.join(root, "outer");
+    const { mkdir, writeFile } = await import("node:fs/promises");
+    await mkdir(outer, { recursive: true });
+    execFileSync("git", ["-C", outer, "init", "--quiet"]);
+    await writeFile(path.join(outer, ".gitignore"), "repos/\n");
+    const inner = path.join(outer, "repos", "proj-uuid");
+    await mkdir(inner, { recursive: true });
+
+    // 未 init 的子目录:必须报 repo_not_found,而不是静默用外层仓库。
+    await expect(store.head(inner, "a.md")).rejects.toMatchObject({ code: "repo_not_found" });
+
+    // init 后的写入必须进自己的仓库,外层仓库保持干净。
+    await store.init(inner);
+    okVersion(await store.commit(inner, "a.md", { baseVersion: null, content: "1" }));
+    expect(existsSync(path.join(inner, ".git"))).toBe(true);
+    expect(execFileSync("git", ["-C", outer, "status", "--porcelain"]).toString().trim()).toBe("?? .gitignore");
+    expect(execFileSync("git", ["-C", inner, "log", "--format=%s"]).toString().trim()).toBe("create a.md");
+  });
+
+  it("显式 message 原样落到 commit;不传则用调用方给的默认值", async () => {
+    await store.init(dir);
+    okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "1", message: "手填的提交信息" }));
+    expect(execFileSync("git", ["-C", dir, "log", "-1", "--format=%s"]).toString().trim()).toBe("手填的提交信息");
+    // 以 `-` 开头的 message 不得被当成选项(execFile 数组形式 + `-m` 传入)。
+    okVersion(await store.commit(dir, "b.md", { baseVersion: null, content: "1", message: "--force 看着像选项" }));
+    expect(execFileSync("git", ["-C", dir, "log", "-1", "--format=%s"]).toString().trim()).toBe("--force 看着像选项");
+  });
+
+  it("diff 是真 unified diff,含增删行", async () => {
+    await store.init(dir);
+    const v1 = okVersion(await store.commit(dir, "a.md", { baseVersion: null, content: "keep\nold\n" }));
+    const v2 = okVersion(await store.commit(dir, "a.md", { baseVersion: v1, content: "keep\nnew\n" }));
+    const d = await store.diff(dir, "a.md", v1, v2);
+    expect(d).toContain("-old");
+    expect(d).toContain("+new");
+    expect(d).toContain(" keep");
+  });
+
+  it("不存在的 version → version_not_found;非法路径 → invalid_path", async () => {
+    await store.init(dir);
+    await store.commit(dir, "a.md", { baseVersion: null, content: "1" });
+    const bogus = "0".repeat(40);
+    await expect(store.read(dir, "a.md", bogus)).rejects.toMatchObject({ code: "version_not_found" });
+    for (const bad of ["../escape.md", "a/../../b.md", ".git/config", "/abs.md", "a\\b.md"]) {
+      await expect(store.read(dir, bad)).rejects.toMatchObject({ code: "invalid_path" });
+    }
+  });
+
+  it("仓库内的 hooks 不被执行(ADR-0030 加固)", async () => {
+    await store.init(dir);
+    // 装一个会失败的 pre-commit hook:若 hooks 生效,下面的 commit 就会失败。
+    const { mkdir, writeFile, chmod } = await import("node:fs/promises");
+    const hookDir = path.join(dir, ".git", "hooks");
+    await mkdir(hookDir, { recursive: true });
+    const hook = path.join(hookDir, "pre-commit");
+    await writeFile(hook, "#!/bin/sh\nexit 1\n");
+    await chmod(hook, 0o755);
+    expect((await store.commit(dir, "a.md", { baseVersion: null, content: "1" })).status).toBe("ok");
+  });
+});
@@ -23,7 +23,11 @@ describe("InMemoryVersionStore · C1 语义", () => {
  it("新建(baseVersion null)→ ok;head/read 命中", async () => {
    const store = createInMemoryVersionStore();
    await store.init(DIR);
-    const r = await store.commit(DIR, "a.md", { baseVersion: null, content: "v1 内容", author: "u1" });
+    const r = await store.commit(DIR, "a.md", {
+      baseVersion: null,
+      content: "v1 内容",
+      author: { userId: "u1" },
+    });
    expect(r).toEqual({ status: "ok", version: "v1" });
    expect((await store.read(DIR, "a.md")).toString()).toBe("v1 内容");
  });
@@ -0,0 +1,100 @@
+/**
+ * POST /auth/logout 不读 body,应接受任何(或没有)Content-Type。
+ *
+ * 回归背景:该端点原先只有 Fastify 默认的 JSON parser,`curl -d ""` 之类带上
+ * form-urlencoded 的空 POST 会在解析阶段被 415 拒掉。修法是给它一个 catch-all
+ * parser —— 但**必须封装在自己的作用域里**。
+ *
+ * 最后一个 case 是这条修复的护栏:admin plugin 没有 fastify-plugin 封装,parser
+ * 若加到外层实例上会让全站每个 POST 都接受 form-urlencoded。而 form-urlencoded
+ * 是跨站 HTML form 唯一能发出的媒体类型(application/json 会触发 CORS
+ * preflight),"只认 JSON"是一层 CSRF 纵深防御,不能为了 logout 全局放掉。
+ */
+import Fastify, { type FastifyInstance } from "fastify";
+import cookie from "@fastify/cookie";
+import { describe, expect, it } from "vitest";
+import { SESSION_COOKIE_NAME } from "../../src/admin/auth/session.js";
+
+/** 复刻 authRoutes 里 logout 的注册方式(不拉起整个 admin plugin 与 Prisma)。 */
+async function buildApp(): Promise<FastifyInstance> {
+  const app = Fastify({ logger: false });
+  await app.register(cookie);
+
+  await app.register(async (scope) => {
+    for (const mediaType of ["*", "application/json"]) {
+      scope.addContentTypeParser(mediaType, { parseAs: "string" }, (_request, _body, done) => {
+        done(null, undefined);
+      });
+    }
+    scope.post("/auth/logout", async (_request, reply) => {
+      reply.clearCookie(SESSION_COOKIE_NAME, { path: "/" });
+      return reply.status(204).send();
+    });
+  });
+
+  // 作用域外的改写型端点:用来证明 parser 没有漏出去。
+  app.post("/api/unrelated", async () => ({ ok: true }));
+
+  await app.ready();
+  return app;
+}
+
+describe("POST /auth/logout content-type tolerance", () => {
+  it("accepts a POST with no Content-Type", async () => {
+    const app = await buildApp();
+    const res = await app.inject({ method: "POST", url: "/auth/logout" });
+    expect(res.statusCode).toBe(204);
+    expect(JSON.stringify(res.headers["set-cookie"])).toContain(SESSION_COOKIE_NAME);
+    await app.close();
+  });
+
+  it("accepts an empty form-encoded POST (curl -d '' 的默认)", async () => {
+    const app = await buildApp();
+    const res = await app.inject({
+      method: "POST",
+      url: "/auth/logout",
+      headers: { "content-type": "application/x-www-form-urlencoded" },
+      payload: "",
+    });
+    expect(res.statusCode).toBe(204);
+    await app.close();
+  });
+
+  it("accepts a form-encoded POST with a body, ignoring it", async () => {
+    const app = await buildApp();
+    const res = await app.inject({
+      method: "POST",
+      url: "/auth/logout",
+      headers: { "content-type": "application/x-www-form-urlencoded" },
+      payload: "role=OWNER&x=1",
+    });
+    expect(res.statusCode).toBe(204);
+    await app.close();
+  });
+
+  it("accepts application/json with an empty body", async () => {
+    const app = await buildApp();
+    const res = await app.inject({
+      method: "POST",
+      url: "/auth/logout",
+      headers: { "content-type": "application/json" },
+      payload: "",
+    });
+    expect(res.statusCode).toBe(204);
+    await app.close();
+  });
+
+  // 护栏:catch-all parser 不得泄漏到作用域外的路由。
+  it("does NOT make unrelated POST routes accept form-encoded bodies", async () => {
+    const app = await buildApp();
+    const res = await app.inject({
+      method: "POST",
+      url: "/api/unrelated",
+      headers: { "content-type": "application/x-www-form-urlencoded" },
+      payload: "role=OWNER",
+    });
+    expect(res.statusCode).toBe(415);
+    expect(res.json().code).toBe("FST_ERR_CTP_INVALID_MEDIA_TYPE");
+    await app.close();
+  });
+});
Author	SHA1	Message	Date
白	87bbf0bd57	feat(filelib-web): 刷新页面时保持树展开、选中节点、tab 与文件夹位置	2026-07-27 21:27:09 +08:00
白	8eda04f1d9	fix(filelib-web): 文件内容无变化时不提交 commit	2026-07-27 21:21:15 +08:00
白	1dab83f9db	feat(filelib): 项目新增修改历史 tab 并隐藏 version hash id	2026-07-27 21:19:59 +08:00
白	8c26c42e0c	feat(filelib-web): 编辑器增加 Typst 语法高亮支持	2026-07-27 21:02:02 +08:00
白	fe38d0b8a9	feat(filelib-web): 文件编辑改为模态框并集成 CodeMirror 语法高亮	2026-07-27 20:53:16 +08:00
白	e194670d74	feat(filelib-web): 文件面板支持资源管理器式文件夹导航与图标视图切换	2026-07-27 20:48:23 +08:00
白	3b544d99f4	feat(filelib): 导出改为下载 cph 编译的真实 PDF	2026-07-27 20:25:29 +08:00
白	ce5fbfb9a6	fix(filelib): 上传上限抬到 50MiB,并把它与 body limit 的串联写清 7.8MB 文件上传报 413:那是 Fastify 在 body 解析阶段拒的,不是 HUB_FILELIB_MAX_FILE_BYTES。上传把内容放在 JSON body 里、二进制过 base64 体积涨 4/3,所以有效上限是 min(该值, HUB_HTTP_BODY_LIMIT_BYTES × 3/4)。原先 body limit 是 1MiB,10MiB 的文件上限根本不可达。 .env.example:body limit 1MiB → 70MiB,新增 HUB_FILELIB_MAX_FILE_BYTES=50MiB。注意 body limit 同时是 ADR-0022 requestBodySize 维度的平台 ceiling,抬高它对所有端点生效。 resolveMaxFileBytes 拆成 parseMaxFileBytes(纯解析)+ resolveMaxFileBytes(读 env):原先带默认参数,显式传 undefined 会回落到读 env,"没传值"与"读环境变量" 分不开,vitest 加载 .env 后测试会读到真实配置。	2026-07-27 16:14:50 +08:00
白	4849a765da	fix(filelib): 授权表与侧栏展示 displayName 而非裸 userId GrantDto 加 principalName:USER → User.displayName,GROUP → MemberGroup.name, 取不到行(用户/组已删)时回落为 principalId,与 /database/api/me 同一回落语义。解析走批量 helper(两条 IN 查询,非 N+1),listGrants/putGrants/forceAdjustGrants 三个出口共用,保证 GET 与 PUT 响应同形状。组不按 archivedAt 过滤 —— 已归档组的历史授权仍需显示名字,否则管理员无法辨认后收回。 principalName 是纯展示字段;写路径仍只认 principalId,不得据此做授权判断。前端: - GrantsPanel 主体列由裸 id 改为展示名,id 移入 title 供排查;收回确认框同步。 - LibraryView 侧栏身份区改用 $me.displayName(/me 早已返回,此前未消费)。 - types.ts 去掉重复声明的 Grant 与无引用的 GroupSearchResult。集成测试断言三种情形(displayName / 组名 / 已删主体回落)。	2026-07-27 15:56:07 +08:00
白	82241afb56	feat(filelib)!: VersionStore 改为真 git,一项目一仓库内存 store 换成 gitVersionStore:init 建目录并 git init,VersionId 是 commit hash,某文件的版本取 `git log -1 -- <path>`(D16 文件级版本不因别的文件提交而失效)。删除也是一个 commit,旧版本仍可读。决策见 ADR-0030。 git 用 execFile 调系统二进制,不引依赖。每次调用钉死 --git-dir/--work-tree 并禁 hooks、隔离全局 gitconfig:项目仓库是老师上传的数据,而 storage root 默认就在本 repo 内,不钉死会让命令落到外层仓库上。同时: - 单文件上限改为 HUB_FILELIB_MAX_FILE_BYTES(缺省 10MiB),前端从 /database/config 读,不再两处硬编码 - commit 身份 name=displayName、email=<userId>@filelib.paradigm-edu.net; message 缺省为「【用户名】修改了【路径】」,调用方显式传则优先 - 上传改走弹窗,路径与 commit 信息可手填(原先 prompt 只能填路径) BREAKING CHANGE: VersionId 由计数器(v1/v2)变为 commit hash; CommitRequest.author 由字符串变为 { userId, displayName? }。旧 .version-store.json 不迁移,此前建的项目报 repo_not_found。	2026-07-27 15:55:01 +08:00
白	a306c58db2	fix(filelib-web): 退出登录后管理后台真正跳回登录页管理后台外壳把「未登录跳 /database/admin」写在 onMount 里,只判断一次。但 logout() 只清前端 store(它与老师端 /app 共用,那边 me=null 是终态、不跳转),退出后这层壳重新渲染进 me===null 分支,onMount 不会再跑, 于是永远停在「跳转到登录页…」。把这道权限门移到 $effect,对任何一次「变成未登录」都生效。条件里的 $authChecked 是必要的 —— 否则首屏 session 请求未回时 me 仍是初始 null, 会把已登录用户直接弹去登录页。顺带修好「无权访问管理后台」分支里同一个死胡同的退出按钮。 /auth/logout 的 204 本身没有问题。	2026-07-27 14:24:11 +08:00
白	50ddf32cc2	fix(auth): POST /auth/logout 接受任意 Content-Type 该端点不读 body,但调用方(curl -d、Postman、部分 HTTP 客户端)常给空 POST 自动带上 Content-Type。Fastify 默认只有 JSON parser,遇到别的媒体类型在解析阶段就以 415 FST_ERR_CTP_INVALID_MEDIA_TYPE 拒掉,进不到 handler。修法是给它一个丢弃 body 的 catch-all parser,封装在自己的 register 作用域内。不能加到外层实例上:admin plugin 没有 fastify-plugin 封装,那样会让全站每个 POST/PUT/PATCH 都接受 form-urlencoded。而 form-urlencoded 是跨站 HTML form 唯一能发出的媒体类型(application/json 会触发 CORS preflight),"只认 JSON"本身是一层 CSRF 纵深防御 —— 当前 sameSite=lax 还挡着,但不该为这个端点全局放掉。两处细节: - "*" 只兜没有专属 parser 的媒体类型。内建 JSON parser 优先级更高,空 body 会被它判成 FST_ERR_CTP_EMPTY_JSON_BODY(400),故在本作用域内一并覆盖。 - 用 parseAs:"string" 让 Fastify 读完流(否则连接不释放),而非手写 payload.resume()。前端未改 —— 原本不带 Content-Type 的发法一直是 204,是正确的。测试 5 个 case,最后一个是护栏:断言作用域外的 POST 路由发 form-encoded 仍为 415,防止以后有人把 parser 提到外层。	2026-07-26 22:39:46 +08:00
白	e6e23294a2	Merge branch 'feat/member-group-hierarchy' MemberGroup 全局嵌套层级(ADR-0028)与 /database 前后端分离(ADR-0029)。	2026-07-26 20:43:59 +08:00