chore: add markdownlint and expand prettier pre-commit scope

.pre-commit-config.yaml

@@ -13,6 +13,14 @@ repos:
       - id: check-toml
       - id: mixed-line-ending
 
+  # Markdown linting
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.45.0
+    hooks:
+      - id: markdownlint
+        args: [--fix]
+        files: \.(md|markdown)$
+
   # TOML linting
   - repo: https://github.com/macisamuele/language-formatters-pre-commit-hooks
     rev: v2.14.0
@@ -86,10 +94,10 @@ repos:
       # Prettier with auto-format for pre-commit (CI uses --check)
       - id: prettier
         name: prettier
-        entry: bash -c 'export PATH="$HOME/.local/share/mise/shims:$HOME/.local/bin:$PATH" && cd frontend && if [ "${CI:-}" = "true" ]; then corepack yarn prettier --check src/; else corepack yarn prettier --write src/; fi'
+        entry: bash -c 'export PATH="$HOME/.local/share/mise/shims:$HOME/.local/bin:$PATH" && FILES=(); for file in "$@"; do FILES+=("$(realpath "$file")"); done && if [ "${CI:-}" = "true" ]; then corepack yarn --cwd frontend prettier --check "${FILES[@]}"; else corepack yarn --cwd frontend prettier --write "${FILES[@]}"; fi' --
         language: system
-        files: ^frontend/.*\.(js|ts|vue|json|css|scss|md)$
-        pass_filenames: false
+        files: \.(js|ts|vue|json|css|scss|md|markdown)$
+        pass_filenames: true
 
       # TypeScript type checking (same as CI)
       - id: typescript-check