feat(cph): implement nested outline manifest and batch/combined export

ADR-0029 — nested outline manifest, supersedes ADR-0008's flat [[parts]]:
- cph-model: recursive loader over manifest.toml containers / element.toml
  leaves; Lesson.parts (pure elements, DFS order) + Lesson.outline (elements
  interleaved with section headings at their DFS-open position); rejects
  ambiguous/incomplete folders and root-vs-container table misplacement
- cph-diag: new DiagCode::ManifestMalformed for carrier-document structure
  errors (discharges an existing TODO)
- cph-typst: augmented manifest now serializes the outline (element/section
  entries) instead of a flat parts array
- render/lib.typ: render-lesson renders section headings at their depth
- examples/TH-141 migrated to 5 nested section containers + 3 root segments,
  byte-identical element order; smoke-verified via cph check/build + pdftotext

ADR-0030 — batch & combined export, extends ADR-0009/0011:
- cph build with no --target batches every declared target (repeatable
  --target for an explicit subset); any target failure => non-zero exit,
  per-target ledger, independent per-target execution
- cph-model: bundle.toml loader (directory + [info]/[targets.*]/ordered
  lessons with per-lesson target overrides)
- cph-typst: augmented bundle manifest (path-prefixed member outlines),
  Engine::{compile_check_bundle,build_bundle_pdf}
- render/lib.typ: render-bundle assembles member lessons under per-lesson
  headings, depth-shifts their own section headings, resets example/lemma
  counters at each lesson boundary by default
- cph-cli: `cph bundle <path> --target <name>` subcommand, same batching
  contract as `cph build`
- new bundle fixtures/tests (cph-model unit + cph-typst through-template PDF
  compile), smoke-verified via a real 2-lesson merged PDF

Verification: cargo fmt/clippy/test clean across the workspace (68 tests);
real cph check/build/bundle runs against TH-141 and a bundle fixture, PDF
content inspected via pdftotext.

crates/cph-typst/tests/bundle.rs

@@ -0,0 +1,122 @@
+//! Integration tests for the bundle build path (ADR-0030): compiling a bundle
+//! target's template (`exports/<target>.typ` under a `bundle.toml` root) as
+//! main, injecting the augmented **bundle** manifest, against the real
+//! `render/` package.
+
+use std::path::PathBuf;
+
+use cph_diag::Severity;
+use cph_typst::{build_augmented_bundle_manifest, Engine};
+
+fn fixture_root() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("tests/fixtures/bundle")
+}
+
+fn real_render_dir() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("..")
+        .join("..")
+        .join("render")
+}
+
+fn load_bundle() -> cph_model::Bundle {
+    let (bundle, diags) = cph_model::load_bundle(&fixture_root());
+    let bundle = bundle.expect("bundle fixture loads into a Bundle");
+    let errors: Vec<_> = diags
+        .iter()
+        .filter(|d| d.severity == Severity::Error)
+        .collect();
+    assert!(errors.is_empty(), "fixture has loader errors: {errors:?}");
+    bundle
+}
+
+/// PURE UNIT TEST (no fonts, no render package): the augmented bundle manifest
+/// carries the bundle's own `[info]` and an ordered `[[lessons]]`, each with
+/// that member's own `info`/`target` and a `path`-prefixed outline (ADR-0030).
+#[test]
+fn augmented_bundle_manifest_prefixes_member_paths() {
+    let bundle = load_bundle();
+    let src = build_augmented_bundle_manifest(&bundle);
+
+    assert!(
+        src.contains("测试合集"),
+        "bundle info.title present:\n{src}"
+    );
+
+    let doc: toml::Value = toml::from_str(&src).expect("augmented bundle manifest is valid TOML");
+    let lessons = doc
+        .get("lessons")
+        .and_then(|l| l.as_array())
+        .expect("lessons array present");
+    assert_eq!(lessons.len(), 2, "two member lessons:\n{src}");
+
+    // lesson-a: target defaults to its own first declared target ("student"),
+    // outline paths are prefixed with "lesson-a/".
+    let a_target = lessons[0].get("target").unwrap().as_str().unwrap();
+    assert_eq!(a_target, "student");
+    let a_outline = lessons[0].get("outline").unwrap().as_array().unwrap();
+    // segment + section heading + lemma = 3 outline entries.
+    assert_eq!(a_outline.len(), 3);
+    let a_seg_path = a_outline[0].get("path").unwrap().as_str().unwrap();
+    assert_eq!(a_seg_path, "lesson-a/segments/a");
+    let a_section_path = a_outline[1].get("path").unwrap().as_str().unwrap();
+    assert_eq!(a_section_path, "lesson-a/小节");
+    let a_lemma_path = a_outline[2].get("path").unwrap().as_str().unwrap();
+    assert_eq!(a_lemma_path, "lesson-a/小节/lemmas/引理甲");
+
+    // lesson-b: bundle.toml overrides `target = "teacher"`.
+    let b_target = lessons[1].get("target").unwrap().as_str().unwrap();
+    assert_eq!(b_target, "teacher");
+    let b_outline = lessons[1].get("outline").unwrap().as_array().unwrap();
+    assert_eq!(b_outline.len(), 1);
+    let b_seg_path = b_outline[0].get("path").unwrap().as_str().unwrap();
+    assert_eq!(b_seg_path, "lesson-b/segments/b");
+}
+
+/// THROUGH-TEMPLATE compile-check against the REAL render package: compiling
+/// the bundle's `merged` target as main with the injected augmented bundle
+/// manifest is clean.
+#[test]
+fn compile_check_clean_through_bundle_template() {
+    let bundle = load_bundle();
+    let engine = Engine::with_render_dir(real_render_dir());
+    let diags = engine.compile_check_bundle(&bundle, "merged");
+    let errors: Vec<_> = diags
+        .iter()
+        .filter(|d| d.severity == Severity::Error)
+        .collect();
+    assert!(errors.is_empty(), "unexpected compile errors: {errors:#?}");
+}
+
+/// THROUGH-TEMPLATE PDF export, fully offline: a non-trivial combined PDF is
+/// produced from the two member lessons through the real bundle template.
+#[test]
+fn build_bundle_pdf_through_template_offline() {
+    let bundle = load_bundle();
+    let engine = Engine::with_render_dir(real_render_dir());
+
+    let pdf = engine
+        .build_bundle_pdf(&bundle, "merged")
+        .unwrap_or_else(|d| panic!("bundle PDF build failed: {d:#?}"));
+    assert!(pdf.starts_with(b"%PDF"), "output is a PDF");
+    assert!(
+        pdf.len() > 1024,
+        "bundle PDF is non-trivial (got {} bytes)",
+        pdf.len()
+    );
+}
+
+/// An undeclared bundle target name is a blocking `SchemaViolation`, exactly
+/// like a lesson's own unknown-target path.
+#[test]
+fn unknown_bundle_target_is_blocking() {
+    let bundle = load_bundle();
+    let engine = Engine::with_render_dir(real_render_dir());
+    let diags = engine.compile_check_bundle(&bundle, "nonexistent");
+    assert_eq!(diags.len(), 1, "one blocking diagnostic: {diags:#?}");
+    assert_eq!(diags[0].severity, Severity::Error);
+    assert!(
+        diags[0].message.contains("not declared"),
+        "expected an undeclared-target error: {diags:#?}"
+    );
+}

crates/cph-typst/tests/compile.rs

@@ -39,10 +39,12 @@ fn load_mini() -> cph_model::Lesson {
 }
 
 /// PURE UNIT TEST (no fonts, no render package): the augmented manifest carries
-/// `[info]`, the ordered `[[parts]]`, and a per-part `fields` array listing the
-/// content fields present on disk.
+/// `[info]` and the ordered `[[outline]]` (ADR-0029) — elements (with a
+/// per-element `fields` array of the content fields present on disk)
+/// interleaved with the section heading the mini fixture nests its two lemmas
+/// under.
 #[test]
-fn augmented_manifest_has_per_part_fields() {
+fn augmented_manifest_has_outline_with_section_and_fields() {
     let lesson = load_mini();
     let src = build_augmented_manifest(&lesson);
 
@@ -50,66 +52,86 @@ fn augmented_manifest_has_per_part_fields() {
     assert!(src.contains("迷你示例课时"), "info.title present:\n{src}");
     assert!(src.contains("测试作者"), "info.author present:\n{src}");
 
-    // Parse it back to inspect the per-part fields precisely.
+    // Parse it back to inspect the outline entries precisely.
     let doc: toml::Value = toml::from_str(&src).expect("augmented manifest is valid TOML");
-    let parts = doc
-        .get("parts")
+    let outline = doc
+        .get("outline")
         .and_then(|p| p.as_array())
-        .expect("parts array present");
-    assert_eq!(parts.len(), 4, "four parts in declared order:\n{src}");
+        .expect("outline array present");
+    // segment, section, lemma, lemma, example — 5 entries (ADR-0029: the
+    // section contributes a heading entry, not an element).
+    assert_eq!(outline.len(), 5, "five outline entries:\n{src}");
 
-    // `fields` is a presence SET (the template tests membership), so order is
-    // not load-bearing; sort for a stable assertion.
-    let fields_of = |idx: usize| -> Vec<String> {
-        let mut v: Vec<String> = parts[idx]
-            .get("fields")
-            .and_then(|f| f.as_array())
-            .expect("part has a fields array")
-            .iter()
-            .map(|v| v.as_str().unwrap().to_string())
-            .collect();
-        v.sort();
-        v
-    };
-    let path_of = |idx: usize| {
-        parts[idx]
-            .get("path")
+    let entry_type = |idx: usize| {
+        outline[idx]
+            .get("type")
             .unwrap()
             .as_str()
             .unwrap()
             .to_string()
     };
     let kind_of = |idx: usize| {
-        parts[idx]
+        outline[idx]
             .get("kind")
             .unwrap()
             .as_str()
             .unwrap()
             .to_string()
     };
+    let path_of = |idx: usize| {
+        outline[idx]
+            .get("path")
+            .unwrap()
+            .as_str()
+            .unwrap()
+            .to_string()
+    };
+    // `fields` is a presence SET (the template tests membership), so order is
+    // not load-bearing; sort for a stable assertion.
+    let fields_of = |idx: usize| -> Vec<String> {
+        let mut v: Vec<String> = outline[idx]
+            .get("fields")
+            .and_then(|f| f.as_array())
+            .expect("element entry has a fields array")
+            .iter()
+            .map(|v| v.as_str().unwrap().to_string())
+            .collect();
+        v.sort();
+        v
+    };
 
-    // Order preserved: segment, lemma (w/ proof), lemma (no proof), example.
+    // Order preserved: segment, section (引理组), lemma (w/ proof), lemma (no
+    // proof), example.
+    assert_eq!(entry_type(0), "element");
     assert_eq!(kind_of(0), "segment");
-    assert_eq!(kind_of(1), "lemma");
-    assert_eq!(kind_of(2), "lemma");
-    assert_eq!(kind_of(3), "example");
-
-    // Paths kept as forward-slash UTF-8.
     assert_eq!(path_of(0), "segments/开场对照导言");
-    assert_eq!(path_of(2), "lemmas/无证明引理");
-
-    // segment: only `textbook` exists.
     assert_eq!(fields_of(0), vec!["textbook"]);
+
+    assert_eq!(entry_type(1), "section");
+    assert_eq!(outline[1].get("title").unwrap().as_str().unwrap(), "引理组");
+    assert_eq!(outline[1].get("depth").unwrap().as_integer().unwrap(), 1);
+    assert_eq!(path_of(1), "引理组");
+
+    assert_eq!(entry_type(2), "element");
+    assert_eq!(kind_of(2), "lemma");
+    assert_eq!(path_of(2), "引理组/lemmas/量纲分析估计");
     // lemma WITH proof.typ: both stmt + proof present (sorted).
-    assert_eq!(fields_of(1), vec!["proof", "stmt"]);
+    assert_eq!(fields_of(2), vec!["proof", "stmt"]);
+
+    assert_eq!(entry_type(3), "element");
+    assert_eq!(kind_of(3), "lemma");
+    assert_eq!(path_of(3), "引理组/lemmas/无证明引理");
     // lemma WITHOUT proof.typ: only stmt present (the OPTIONAL-content path).
     assert_eq!(
-        fields_of(2),
+        fields_of(3),
         vec!["stmt"],
         "proof must be omitted when absent"
     );
+
+    assert_eq!(entry_type(4), "element");
+    assert_eq!(kind_of(4), "example");
     // example: problem + solution present (source is a scalar, not a content field).
-    assert_eq!(fields_of(3), vec!["problem", "solution"]);
+    assert_eq!(fields_of(4), vec!["problem", "solution"]);
 }
 
 /// THROUGH-TEMPLATE compile-check against the REAL render package: compiling the
@@ -202,6 +224,7 @@ fn file_tree_artifact_is_deferred() {
             authors: vec![],
         },
         parts: vec![],
+        outline: vec![],
         targets: vec![TargetConfig {
             name: "web".into(),
             artifact: Artifact::FileTree {
@@ -241,6 +264,7 @@ fn shell_only_target_is_deferred() {
             authors: vec![],
         },
         parts: vec![],
+        outline: vec![],
         targets: vec![TargetConfig {
             name: "packaged".into(),
             artifact: Artifact::SingleFile {

crates/cph-typst/tests/fixtures/bundle/bundle.toml

@@ -0,0 +1,16 @@
+[info]
+title = "测试合集"
+author = "测试作者"
+
+[[lessons]]
+path = "lesson-a"
+
+[[lessons]]
+path = "lesson-b"
+target = "teacher"
+
+[targets.merged]
+artifact = { type = "single-file", filepath = "build/merged.pdf" }
+[[targets.merged.steps]]
+type = "typst-compile"
+template = "exports/merged.typ"

crates/cph-typst/tests/fixtures/bundle/exports/merged.typ

@@ -0,0 +1,76 @@
+// DEFAULT BUNDLE TEMPLATE (ADR-0030, outline shape ADR-0029).
+//
+// Lives in a bundle at `<bundle-root>/exports/<target>.typ`, e.g.
+// `exports/merged.typ`. Compiled AS MAIN with the augmented BUNDLE manifest
+// injected:
+//   typst compile --root <bundle-root> --input manifest=<path-rel-to-root> exports/merged.typ <out>
+//
+// Structurally identical to the single-lesson `student.typ`/`teacher.typ`
+// templates (see their notes on why the include loop lives in the template,
+// not in cph-render), except it reads `manifest.lessons` (an ordered array of
+// per-lesson `(info, target, outline)` tables — see
+// `cph_typst::build_augmented_bundle_manifest`) instead of a single
+// `manifest.outline`, and calls `render-bundle` instead of `render-lesson`.
+//
+// Every outline entry's `path` in a bundle manifest is ALREADY prefixed with
+// that lesson's own bundle-root-relative directory (done by the Rust engine),
+// so the same `include "/" + path + "/" + field + ".typ"` computation used by
+// a single-lesson template resolves correctly here too — no special-casing
+// needed in this loop.
+
+#import "@local/cph-render:0.1.0": render-bundle, part-fields, default-heading-numbering
+
+#let manifest = toml(sys.inputs.manifest)
+#let info = manifest.at("info", default: (:))
+#let raw-lessons = manifest.at("lessons", default: ())
+
+// Assemble one outline entry exactly as a single-lesson template would.
+#let assemble-entry(raw) = {
+  if raw.at("type", default: "element") == "section" {
+    (
+      entry-type: "section",
+      kind: raw.at("kind", default: none),
+      title: raw.at("title", default: ""),
+      depth: raw.at("depth", default: 1),
+    )
+  } else {
+    let kind = raw.at("kind", default: none)
+    let path = raw.at("path", default: none)
+    let spec = part-fields.at(kind, default: (content: (), optional-content: (), scalars: ()))
+    let present = raw.at("fields", default: ())
+    let entry = (entry-type: "element", kind: kind)
+
+    for field in spec.content {
+      entry.insert(field, include "/" + path + "/" + field + ".typ")
+    }
+    for field in spec.optional-content {
+      if field in present {
+        entry.insert(field, include "/" + path + "/" + field + ".typ")
+      }
+    }
+    if spec.scalars.len() > 0 {
+      let element = toml("/" + path + "/element.toml")
+      for field in spec.scalars {
+        let v = element.at(field, default: none)
+        if v != none and v != "" { entry.insert(field, v) }
+      }
+    }
+    entry
+  }
+}
+
+#let lessons = raw-lessons.map(raw => (
+  info: raw.at("info", default: (:)),
+  target: raw.at("target", default: "student"),
+  outline: raw.at("outline", default: ()).map(assemble-entry),
+))
+
+// Presentation: shared per-level heading numbering across the whole bundle,
+// and the ADR-0030 recommended default of resetting auto-counters at each
+// lesson boundary (override `reset-counters: false` for continuous numbering).
+#render-bundle(
+  info: info,
+  lessons: lessons,
+  heading-numbering: default-heading-numbering,
+  reset-counters: true,
+)

crates/cph-typst/tests/fixtures/bundle/lesson-a/manifest.toml

@@ -0,0 +1,17 @@
+[project]
+id = "lesson-a"
+name = "lesson-a"
+
+[info]
+title = "课时A"
+author = "作者A"
+
+[[children]]
+kind = "segment"
+path = "segments/a"
+
+[[children]]
+kind = "section"
+path = "小节"
+
+[targets.student]

crates/cph-typst/tests/fixtures/bundle/lesson-a/segments/a/element.toml

@@ -0,0 +1 @@
+kind = "segment"

crates/cph-typst/tests/fixtures/bundle/lesson-a/segments/a/textbook.typ

@@ -0,0 +1 @@
+= 课时A导言

crates/cph-typst/tests/fixtures/bundle/lesson-a/小节/lemmas/引理甲/stmt.typ

@@ -0,0 +1 @@
+引理甲陈述。

crates/cph-typst/tests/fixtures/bundle/lesson-a/小节/manifest.toml

@@ -0,0 +1,6 @@
+[group]
+title = "小节"
+
+[[children]]
+kind = "lemma"
+path = "lemmas/引理甲"

crates/cph-typst/tests/fixtures/bundle/lesson-b/manifest.toml

@@ -0,0 +1,12 @@
+[project]
+id = "lesson-b"
+name = "lesson-b"
+
+[info]
+title = "课时B"
+
+[[children]]
+kind = "segment"
+path = "segments/b"
+
+[targets.teacher]

crates/cph-typst/tests/fixtures/bundle/lesson-b/segments/b/element.toml

@@ -0,0 +1 @@
+kind = "segment"

crates/cph-typst/tests/fixtures/bundle/lesson-b/segments/b/textbook.typ

@@ -0,0 +1 @@
+= 课时B导言

crates/cph-typst/tests/fixtures/mini/exports/student.typ

@@ -1,4 +1,4 @@
-// DEFAULT STUDENT TEMPLATE (framework default; ADR-0011).
+// DEFAULT STUDENT TEMPLATE (framework default; ADR-0011, outline shape ADR-0029).
 //
 // This is a *real, editable* file that lives in an engineering file at
 // `exports/student.typ`. The framework compiles it AS THE MAIN FILE with the
@@ -15,15 +15,16 @@
 // its own virtual root — an include inside cph-render would resolve against the
 // PACKAGE, not the engineering root. A `/<part.path>/<field>.typ` written HERE
 // (this template lives under `--root`) resolves against `--root`. So the
-// template loads content and hands cph-render an already-assembled `parts` array.
+// template loads content and hands cph-render an already-assembled `outline`
+// array (elements interleaved with section headings, ADR-0029).
 //
 // OPEN CONTRACT POINT — optional-content presence. typst has no "does this file
 // exist" primitive (a missing `include` is a hard compile error). So the
 // template CANNOT probe disk the way the old Rust driver did for lemma `proof`.
 // It relies on the manifest declaring which optional content fields are present,
-// via a per-part `fields` array listing the content fields that exist on disk
+// via a per-element `fields` array listing the content fields that exist on disk
 // (the engine knows this — it walks the part dir). Required fields are loaded
-// unconditionally; optional fields load only if listed in `fields`. If a part
+// unconditionally; optional fields load only if listed in `fields`. If an element
 // omits `fields`, optional content is skipped (conservative). The exact shape of
 // this declaration is for the manifest/Rust contract to pin.
 
@@ -35,38 +36,51 @@
 // Read the injected manifest (a path string relative to typst --root).
 #let manifest = toml(sys.inputs.manifest)
 #let info = manifest.at("info", default: (:))
-#let raw-parts = manifest.at("parts", default: ())
+#let raw-outline = manifest.at("outline", default: ())
 
-// Assemble each part: include its content fields (computed absolute paths,
-// resolved against --root) and read scalar fields from <path>/element.toml.
-// `part-fields` (from cph-render) is the single source of truth for kind->fields.
-#let parts = raw-parts.map(raw => {
-  let kind = raw.at("kind", default: none)
-  let path = raw.at("path", default: none)
-  let spec = part-fields.at(kind, default: (content: (), optional-content: (), scalars: ()))
-  // Which optional content fields are present on disk (manifest-declared).
-  let present = raw.at("fields", default: ())
-  let part = (kind: kind)
+// Assemble each outline entry:
+// - an "element" entry: include its content fields (computed absolute paths,
+//   resolved against --root) and read scalar fields from <path>/element.toml.
+//   `part-fields` (from cph-render) is the single source of truth for
+//   kind->fields.
+// - a "section" entry (ADR-0029): pass its title/depth straight through — no
+//   content to load, it is a heading.
+#let outline = raw-outline.map(raw => {
+  if raw.at("type", default: "element") == "section" {
+    (
+      entry-type: "section",
+      kind: raw.at("kind", default: none),
+      title: raw.at("title", default: ""),
+      depth: raw.at("depth", default: 1),
+    )
+  } else {
+    let kind = raw.at("kind", default: none)
+    let path = raw.at("path", default: none)
+    let spec = part-fields.at(kind, default: (content: (), optional-content: (), scalars: ()))
+    // Which optional content fields are present on disk (manifest-declared).
+    let present = raw.at("fields", default: ())
+    let entry = (entry-type: "element", kind: kind)
 
-  // Required content fields: <path>/<field>.typ (absolute, root-relative).
-  for field in spec.content {
-    part.insert(field, include "/" + path + "/" + field + ".typ")
-  }
-  // Optional content fields: only when the manifest says the file exists.
-  for field in spec.optional-content {
-    if field in present {
-      part.insert(field, include "/" + path + "/" + field + ".typ")
+    // Required content fields: <path>/<field>.typ (absolute, root-relative).
+    for field in spec.content {
+      entry.insert(field, include "/" + path + "/" + field + ".typ")
     }
-  }
-  // Scalar fields come from <path>/element.toml.
-  if spec.scalars.len() > 0 {
-    let element = toml("/" + path + "/element.toml")
-    for field in spec.scalars {
-      let v = element.at(field, default: none)
-      if v != none and v != "" { part.insert(field, v) }
+    // Optional content fields: only when the manifest says the file exists.
+    for field in spec.optional-content {
+      if field in present {
+        entry.insert(field, include "/" + path + "/" + field + ".typ")
+      }
     }
+    // Scalar fields come from <path>/element.toml.
+    if spec.scalars.len() > 0 {
+      let element = toml("/" + path + "/element.toml")
+      for field in spec.scalars {
+        let v = element.at(field, default: none)
+        if v != none and v != "" { entry.insert(field, v) }
+      }
+    }
+    entry
   }
-  part
 })
 
 // Presentation: per-level heading numbering. Default (一、 / 1.1 / 1.1.1) comes
@@ -74,6 +88,6 @@
 #render-lesson(
   info: info,
   target: target,
-  parts: parts,
+  outline: outline,
   heading-numbering: default-heading-numbering,
 )

crates/cph-typst/tests/fixtures/mini/exports/teacher.typ

@@ -1,4 +1,4 @@
-// DEFAULT TEACHER TEMPLATE (framework default; ADR-0011).
+// DEFAULT TEACHER TEMPLATE (framework default; ADR-0011, outline shape ADR-0029).
 //
 // Lives in an engineering file at `exports/teacher.typ`. Compiled AS MAIN with
 // the manifest injected:
@@ -18,38 +18,47 @@
 // Read the injected manifest (a path string relative to typst --root).
 #let manifest = toml(sys.inputs.manifest)
 #let info = manifest.at("info", default: (:))
-#let raw-parts = manifest.at("parts", default: ())
+#let raw-outline = manifest.at("outline", default: ())
 
-// Assemble each part: include its content fields (computed absolute paths,
-// resolved against --root) and read scalar fields from <path>/element.toml.
-// `part-fields` (from cph-render) is the single source of truth for kind->fields.
-#let parts = raw-parts.map(raw => {
-  let kind = raw.at("kind", default: none)
-  let path = raw.at("path", default: none)
-  let spec = part-fields.at(kind, default: (content: (), optional-content: (), scalars: ()))
-  // Which optional content fields are present on disk (manifest-declared).
-  let present = raw.at("fields", default: ())
-  let part = (kind: kind)
+// Assemble each outline entry: an "element" entry includes its content fields
+// and reads scalars from element.toml; a "section" entry (ADR-0029) passes
+// title/depth straight through as a heading, no content to load.
+#let outline = raw-outline.map(raw => {
+  if raw.at("type", default: "element") == "section" {
+    (
+      entry-type: "section",
+      kind: raw.at("kind", default: none),
+      title: raw.at("title", default: ""),
+      depth: raw.at("depth", default: 1),
+    )
+  } else {
+    let kind = raw.at("kind", default: none)
+    let path = raw.at("path", default: none)
+    let spec = part-fields.at(kind, default: (content: (), optional-content: (), scalars: ()))
+    // Which optional content fields are present on disk (manifest-declared).
+    let present = raw.at("fields", default: ())
+    let entry = (entry-type: "element", kind: kind)
 
-  // Required content fields: <path>/<field>.typ (absolute, root-relative).
-  for field in spec.content {
-    part.insert(field, include "/" + path + "/" + field + ".typ")
-  }
-  // Optional content fields: only when the manifest says the file exists.
-  for field in spec.optional-content {
-    if field in present {
-      part.insert(field, include "/" + path + "/" + field + ".typ")
+    // Required content fields: <path>/<field>.typ (absolute, root-relative).
+    for field in spec.content {
+      entry.insert(field, include "/" + path + "/" + field + ".typ")
     }
-  }
-  // Scalar fields come from <path>/element.toml.
-  if spec.scalars.len() > 0 {
-    let element = toml("/" + path + "/element.toml")
-    for field in spec.scalars {
-      let v = element.at(field, default: none)
-      if v != none and v != "" { part.insert(field, v) }
+    // Optional content fields: only when the manifest says the file exists.
+    for field in spec.optional-content {
+      if field in present {
+        entry.insert(field, include "/" + path + "/" + field + ".typ")
+      }
     }
+    // Scalar fields come from <path>/element.toml.
+    if spec.scalars.len() > 0 {
+      let element = toml("/" + path + "/element.toml")
+      for field in spec.scalars {
+        let v = element.at(field, default: none)
+        if v != none and v != "" { entry.insert(field, v) }
+      }
+    }
+    entry
   }
-  part
 })
 
 // Presentation: per-level heading numbering. Default (一、 / 1.1 / 1.1.1) comes
@@ -57,6 +66,6 @@
 #render-lesson(
   info: info,
   target: target,
-  parts: parts,
+  outline: outline,
   heading-numbering: default-heading-numbering,
 )

crates/cph-typst/tests/fixtures/mini/manifest.toml

@@ -6,19 +6,15 @@ name = "迷你课时"
 title = "迷你示例课时"
 author = "测试作者"
 
-[[parts]]
+[[children]]
 kind = "segment"
 path = "segments/开场对照导言"
 
-[[parts]]
-kind = "lemma"
-path = "lemmas/量纲分析估计"
+[[children]]
+kind = "section"
+path = "引理组"
 
-[[parts]]
-kind = "lemma"
-path = "lemmas/无证明引理"
-
-[[parts]]
+[[children]]
 kind = "example"
 path = "examples/自由落体"
 

crates/cph-typst/tests/fixtures/mini/引理组/lemmas/量纲分析估计/element.toml

@@ -0,0 +1 @@
+kind = "lemma"

crates/cph-typst/tests/fixtures/mini/引理组/manifest.toml

@@ -0,0 +1,10 @@
+[group]
+title = "引理组"
+
+[[children]]
+kind = "lemma"
+path = "lemmas/量纲分析估计"
+
+[[children]]
+kind = "lemma"
+path = "lemmas/无证明引理"