feat: add per-vault reindexing with selective reload based on modified vaults, simplify hidden files whitelist logic to include all sub-hidden files when parent is whitelisted, and auto-uncheck includeHidden when adding whitelist items

backend/main.py

@@ -1198,6 +1198,28 @@ async def api_reload(current_user=Depends(require_admin)):
     return {"status": "ok", "vaults": stats}
 
 
+@app.get("/api/index/reload/{vault_name}")
+async def api_reload_vault(vault_name: str, current_user=Depends(require_admin)):
+    """Force a re-index of a single vault.
+    
+    Args:
+        vault_name: Name of the vault to reindex.
+        
+    Returns:
+        Dict with vault statistics.
+    """
+    try:
+        from backend.indexer import reload_single_vault
+        stats = await reload_single_vault(vault_name)
+        await sse_manager.broadcast("vault_reloaded", {
+            "vault": vault_name,
+            "stats": stats,
+        })
+        return {"status": "ok", "vault": vault_name, "stats": stats}
+    except ValueError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+
+
 # ---------------------------------------------------------------------------
 # SSE endpoint — Server-Sent Events stream
 # ---------------------------------------------------------------------------