chore: restore checker CI gate

crates/cph-check/src/lib.rs

@@ -360,8 +360,13 @@ pub fn target_is_shell(root: &Path, target: &str) -> bool {
         .iter()
         .find(|t| t.name == target)
         .is_some_and(|t| {
-            t.steps.iter().any(|s| matches!(s, cph_model::Step::Shell { .. }))
-                && !t.steps.iter().any(|s| matches!(s, cph_model::Step::TypstCompile { .. }))
+            t.steps
+                .iter()
+                .any(|s| matches!(s, cph_model::Step::Shell { .. }))
+                && !t
+                    .steps
+                    .iter()
+                    .any(|s| matches!(s, cph_model::Step::TypstCompile { .. }))
         })
 }
 
@@ -370,9 +375,17 @@ fn run_one_shell(cwd: &Path, run: &str) -> ShellStepOutcome {
     use std::process::Command;
 
     let output = if cfg!(target_os = "windows") {
-        Command::new("cmd").arg("/C").arg(run).current_dir(cwd).output()
+        Command::new("cmd")
+            .arg("/C")
+            .arg(run)
+            .current_dir(cwd)
+            .output()
     } else {
-        Command::new("sh").arg("-c").arg(run).current_dir(cwd).output()
+        Command::new("sh")
+            .arg("-c")
+            .arg(run)
+            .current_dir(cwd)
+            .output()
     };
 
     match output {
@@ -704,7 +717,11 @@ fn collect_image_assets(eng_root: &Path, build_root: &Path, body: &str) -> Resul
             }
         }
         if let Err(e) = std::fs::copy(&src, &dst) {
-            return Err(format!("failed to copy '{}' → '{}': {e}", src.display(), dst.display()));
+            return Err(format!(
+                "failed to copy '{}' → '{}': {e}",
+                src.display(),
+                dst.display()
+            ));
         }
     }
     Ok(())
@@ -763,7 +780,8 @@ pub fn target_is_markdown_assemble(root: &Path, target: &str) -> bool {
             t.steps
                 .iter()
                 .any(|s| matches!(s, cph_model::Step::AssembleMarkdown { .. }))
-                && !t.steps
+                && !t
+                    .steps
                     .iter()
                     .any(|s| matches!(s, cph_model::Step::TypstCompile { .. }))
         })
@@ -833,7 +851,11 @@ fn compile_targets(lesson: &cph_model::Lesson) -> Vec<&str> {
     lesson
         .targets
         .iter()
-        .filter(|t| t.steps.iter().any(|s| matches!(s, cph_model::Step::TypstCompile { .. })))
+        .filter(|t| {
+            t.steps
+                .iter()
+                .any(|s| matches!(s, cph_model::Step::TypstCompile { .. }))
+        })
         .map(|t| t.name.as_str())
         .collect()
 }