Add file deletion endpoint with multi-tag filtering support and redesigned editor UI with icon-only buttons

backend/main.py

@@ -231,6 +231,35 @@ async def api_file_save(vault_name: str, path: str = Query(..., description="Rel
         raise HTTPException(status_code=500, detail=f"Error saving file: {str(e)}")
 
 
+@app.delete("/api/file/{vault_name}")
+async def api_file_delete(vault_name: str, path: str = Query(..., description="Relative path to file")):
+    """Delete a file."""
+    vault_data = get_vault_data(vault_name)
+    if not vault_data:
+        raise HTTPException(status_code=404, detail=f"Vault '{vault_name}' not found")
+
+    vault_root = Path(vault_data["path"])
+    file_path = vault_root / path
+
+    try:
+        file_path.resolve().relative_to(vault_root.resolve())
+    except ValueError:
+        raise HTTPException(status_code=403, detail="Access denied: path outside vault")
+
+    if not file_path.exists() or not file_path.is_file():
+        raise HTTPException(status_code=404, detail=f"File not found: {path}")
+
+    try:
+        file_path.unlink()
+        logger.info(f"File deleted: {vault_name}/{path}")
+        return {"status": "ok", "vault": vault_name, "path": path}
+    except PermissionError:
+        raise HTTPException(status_code=403, detail="Permission denied: vault may be read-only")
+    except Exception as e:
+        logger.error(f"Error deleting file {vault_name}/{path}: {e}")
+        raise HTTPException(status_code=500, detail=f"Error deleting file: {str(e)}")
+
+
 @app.get("/api/file/{vault_name}")
 async def api_file(vault_name: str, path: str = Query(..., description="Relative path to file")):
     """Return rendered HTML + metadata for a file."""

backend/search.py

@@ -8,6 +8,12 @@ from backend.indexer import index, get_vault_data
 logger = logging.getLogger("obsigate.search")
 
 
+def _normalize_tag_filter(tag_filter: Optional[str]) -> List[str]:
+    if not tag_filter:
+        return []
+    return [tag.strip().lstrip("#") for tag in tag_filter.split(",") if tag.strip()]
+
+
 def _read_file_content(vault_name: str, file_path: str) -> str:
     """Read raw markdown content of a file from disk."""
     vault_data = get_vault_data(vault_name)
@@ -52,8 +58,9 @@ def search(
     """
     query = query.strip() if query else ""
     has_query = len(query) > 0
+    selected_tags = _normalize_tag_filter(tag_filter)
 
-    if not has_query and not tag_filter:
+    if not has_query and not selected_tags:
         return []
 
     results: List[Dict[str, Any]] = []
@@ -63,7 +70,7 @@ def search(
             continue
 
         for file_info in vault_data["files"]:
-            if tag_filter and tag_filter not in file_info["tags"]:
+            if selected_tags and not all(tag in file_info["tags"] for tag in selected_tags):
                 continue
 
             score = 0