fix(deps): update dependencies and fix all compilation errors

Updated dependencies to latest versions causing breaking changes:
- logos: 0.14 -> 0.16
- lalrpop: 0.21 -> 0.23
- thiserror: 1.0 -> 2.0
- petgraph: 0.6 -> 0.8
- notify: 6.0 -> 8
- toml: 0.8 -> 1.0.2
- tree-sitter (grammar): 0.20 -> 0.26

Fixed compilation issues:
1. logos 0.16: Added allow_greedy for unbounded repetitions in lexer
2. lalrpop 0.23: Changed from process_current_dir() to process()
3. tree-sitter 0.26: Updated bindings to use &Language reference

Also fixed Zed extension:
- Removed local highlights.scm override that had diverged from source
- Added regression test to prevent future divergence

tests/tree_sitter_integration.rs

@@ -329,6 +329,56 @@ concept_comparison SkillLevel {
 // Zed Extension Build Tests
 // ============================================================================
 
+#[test]
+fn test_zed_highlights_query_not_overridden() {
+    // This test ensures the Zed extension doesn't have a local highlights.scm
+    // that overrides the grammar's version. Local overrides create a maintenance
+    // burden and can easily diverge from the source of truth.
+    //
+    // The preferred approach is to let Zed use the fetched grammar's queries.
+    // If a local override is needed (for Zed-specific customizations), this test
+    // will fail and remind us to keep them in sync.
+
+    let grammar_highlights = tree_sitter_dir().join("queries").join("highlights.scm");
+    let zed_highlights = zed_extension_dir()
+        .join("languages")
+        .join("storybook")
+        .join("highlights.scm");
+
+    // Verify grammar version exists
+    assert!(
+        grammar_highlights.exists(),
+        "Grammar highlights.scm not found at {:?}",
+        grammar_highlights
+    );
+
+    // If Zed has a local override, it MUST match the grammar version exactly
+    if zed_highlights.exists() {
+        let grammar_content = std::fs::read_to_string(&grammar_highlights)
+            .expect("Failed to read grammar highlights");
+        let zed_content =
+            std::fs::read_to_string(&zed_highlights).expect("Failed to read zed highlights");
+
+        assert_eq!(
+            grammar_content,
+            zed_content,
+            "\n\nZed extension has a local highlights.scm that differs from the grammar version.\n\
+             This causes the query to fail validation against the fetched grammar.\n\
+             \n\
+             To fix:\n\
+             1. Delete zed-storybook/languages/storybook/highlights.scm (preferred)\n\
+             2. Or sync it: cp tree-sitter-storybook/queries/highlights.scm zed-storybook/languages/storybook/\n\
+             \n\
+             Grammar version: {:?}\n\
+             Zed version: {:?}\n",
+            grammar_highlights,
+            zed_highlights
+        );
+    }
+    // If no local override exists, the test passes - Zed will use the fetched
+    // grammar's version
+}
+
 #[test]
 #[ignore] // Only run with --ignored flag as this is slow
 fn test_zed_extension_builds() {