推进本地索引与 AI changed-files 审计

- 为本地工作区补充 search/backlinks/tags/resource 引用索引与 watcher 单文件刷新
- 在页面设置中增加索引页签，并展示本地反链、标签和 AI changed-files 审计
- 补充本地搜索与本地 AI changed-files 浏览器 smoke，并回填当前优先级 checklist

rust/crates/mnote-web/src/local_folder_watcher_registry.rs

@@ -1,3 +1,4 @@
+use crate::routes::{local_workspace_id_from_root_uri, refresh_local_search_index_for_path};
 use notify::event::ModifyKind;
 use notify::{Config, Event, EventKind, RecommendedWatcher, RecursiveMode, Watcher};
 use serde_json::{json, Value};
@@ -191,12 +192,20 @@ fn spawn_local_folder_watcher(
                         continue;
                     }
                     for path in event.paths {
-                        if !is_markdown_path(&path) {
+                        if !is_local_search_index_path(&path) {
                             continue;
                         }
                         let Some(relative_path) = relative_path_string(&canonical_root, &path) else {
                             continue;
                         };
+                        refresh_local_search_index_for_event(
+                            &canonical_root,
+                            &root_uri_for_task,
+                            &relative_path,
+                        );
+                        if !is_markdown_path(&path) {
+                            continue;
+                        }
                         let payload = json!({
                             "sourceKind": "local_folder",
                             "rootUri": root_uri_for_task,
@@ -215,6 +224,13 @@ fn spawn_local_folder_watcher(
     Ok((sender, shutdown_tx))
 }
 
+fn refresh_local_search_index_for_event(root: &Path, root_uri: &str, relative_path: &str) {
+    let Ok(workspace_id) = local_workspace_id_from_root_uri(root_uri) else {
+        return;
+    };
+    let _ = refresh_local_search_index_for_path(root, root_uri, &workspace_id, relative_path);
+}
+
 fn canonical_root_uri(root: &Path) -> String {
     format!("file://{}", root.display())
 }
@@ -235,6 +251,29 @@ fn is_markdown_path(path: &Path) -> bool {
         .unwrap_or(false)
 }
 
+fn is_local_search_index_path(path: &Path) -> bool {
+    if is_markdown_path(path) {
+        return true;
+    }
+    let file_name = path
+        .file_name()
+        .and_then(|value| value.to_str())
+        .unwrap_or_default()
+        .to_lowercase();
+    if file_name.ends_with(".mindmap.json") {
+        return true;
+    }
+    let extension = path
+        .extension()
+        .and_then(|extension| extension.to_str())
+        .unwrap_or_default()
+        .to_lowercase();
+    matches!(
+        extension.as_str(),
+        "doc" | "docx" | "odt" | "ppt" | "pptx" | "odp" | "xls" | "xlsx" | "ods"
+    )
+}
+
 fn should_emit_event_kind(kind: &EventKind) -> bool {
     match kind {
         EventKind::Create(_) | EventKind::Remove(_) => true,
@@ -276,7 +315,10 @@ fn system_time_ms(time: SystemTime) -> u128 {
 
 #[cfg(test)]
 mod tests {
-    use super::{should_emit_event_kind, LocalFolderWatcherRegistry};
+    use super::{
+        is_local_search_index_path, refresh_local_search_index_for_event, should_emit_event_kind,
+        LocalFolderWatcherRegistry,
+    };
     use notify::event::{AccessKind, CreateKind, DataChange, ModifyKind};
     use notify::EventKind;
 
@@ -348,4 +390,42 @@ mod tests {
             AccessKind::Read
         )));
     }
+
+    #[test]
+    fn watcher_index_path_filter_accepts_markdown_and_resources() {
+        assert!(is_local_search_index_path(&std::path::Path::new(
+            "docs/page.md"
+        )));
+        assert!(is_local_search_index_path(&std::path::Path::new(
+            "maps/idea.mindmap.json"
+        )));
+        assert!(is_local_search_index_path(&std::path::Path::new(
+            "office/report.xlsx"
+        )));
+        assert!(!is_local_search_index_path(&std::path::Path::new(
+            "docs/image.png"
+        )));
+    }
+
+    #[test]
+    fn watcher_event_refreshes_local_search_index_path() {
+        let root = test_root("search-index-event");
+        std::fs::create_dir_all(root.join("docs")).expect("create docs");
+        std::fs::write(root.join("README.md"), "# Home\n").expect("write home");
+        std::fs::write(
+            root.join("docs").join("watched.md"),
+            "---\ntitle: Watched\n---\n# Watched\nWatcherToken\n",
+        )
+        .expect("write watched");
+
+        let root_uri = format!("file://{}", root.display());
+        refresh_local_search_index_for_event(&root, &root_uri, "docs/watched.md");
+
+        let index_path = root.join(".mnote").join("index").join("search-index.json");
+        let index = std::fs::read_to_string(&index_path).expect("index exists");
+        assert!(index.contains("docs/watched.md"));
+        assert!(index.contains("WatcherToken"));
+
+        let _ = std::fs::remove_dir_all(root);
+    }
 }