Add saved searches with CRUD API and UI sidebar

Add extension field to search results and display it
Add active filter badges and save button to search header

backend/main.py

@@ -182,6 +182,7 @@ class AdvancedSearchResultItem(BaseModel):
     score: float = Field(description="TF-IDF relevance score")
     snippet: str = Field(description="Content excerpt with <mark> highlights")
     modified: str = Field(description="ISO 8601 modification timestamp")
+    extension: str = Field(default="", description="File extension")
 
 
 class SearchFacets(BaseModel):
@@ -561,6 +562,7 @@ from backend.secret_redactor import redact_file_content
 from backend.pdf_export import generate_pdf, build_pdf_html
 from backend.share import create_share, get_share_by_token, record_access, revoke_share, list_shares
 from backend.webhooks import get_webhooks, create_webhook, update_webhook, delete_webhook, dispatch_webhooks
+from backend.saved_searches import get_saved, save_search, delete_saved
 
 app.include_router(auth_router)
 
@@ -1017,6 +1019,32 @@ async def api_toggle_bookmark(req: BookmarkToggleRequest, current_user=Depends(r
     return {"bookmarked": is_now_bookmarked}
 
 
+@app.get("/api/saved-searches")
+async def api_saved_searches(current_user=Depends(require_auth)):
+    username = current_user.get("username")
+    if not username:
+        raise HTTPException(401)
+    return get_saved(username)
+
+
+@app.post("/api/saved-searches")
+async def api_save_search(body: dict = Body(...), current_user=Depends(require_auth)):
+    username = current_user.get("username")
+    if not username:
+        raise HTTPException(401)
+    return save_search(username, body)
+
+
+@app.delete("/api/saved-searches/{search_id}")
+async def api_delete_saved_search(search_id: str, current_user=Depends(require_auth)):
+    username = current_user.get("username")
+    if not username:
+        raise HTTPException(401)
+    if not delete_saved(username, search_id):
+        raise HTTPException(404, "Not found")
+    return {"status": "deleted"}
+
+
 @app.get("/api/browse/{vault_name}", response_model=BrowseResponse)
 async def api_browse(vault_name: str, path: str = "", current_user=Depends(require_auth)):
     """Browse directories and files in a vault at a given path level.