perf: add production-ready MongoDB indexes and clean env files

.env

-VITE_CLERK_PUBLISHABLE_KEY=pk_test_Y29tbXVuYWwtc3VuYmVhbS0wLmNsZXJrLmFjY291bnRzLmRldiQ
-CLERK_SECRET_KEY=sk_test_ek7ozVR80Qi9UdvhGaTmlXovS16GDuBDlDrpH1rkyQ
-
-MONGODB_URI = mongodb+srv://20010841:vuhoanganh1704@cluster0.h6qro.mongodb.net/?appName=Cluster0
\ No newline at end of file

backend/common/mongo_client.py

@@ -155,35 +155,58 @@ def parse_object_id(id_str: str) -> ObjectId | None:
 
 
 async def create_indexes():
-    """Create database indexes for performance optimization."""
+    """Create database indexes for performance optimization (Production-ready)."""
     try:
         db = mongodb_client.db
         
-        # Indexes for memos collection
-        await db[COLLECTION_MEMOS].create_index([("user_id", 1), ("created_at", -1)])
-        await db[COLLECTION_MEMOS].create_index([("user_id", 1), ("visibility", 1)])
+        # ====================== MEMOS COLLECTION ======================
+        # Primary query patterns - creator_id is used extensively
+        await db[COLLECTION_MEMOS].create_index([("creator_id", 1), ("created_at", -1)])
+        await db[COLLECTION_MEMOS].create_index([("creator_id", 1), ("visibility", 1)])
+        await db[COLLECTION_MEMOS].create_index([("creator_id", 1), ("pinned", 1)])
+        await db[COLLECTION_MEMOS].create_index([("creator_id", 1), ("row_status", 1)])
+        
+        # Lookup by uid (used for memo detail pages)
+        await db[COLLECTION_MEMOS].create_index([("uid", 1)], unique=True, sparse=True)
+        
+        # Comments lookup (parent reference)
+        await db[COLLECTION_MEMOS].create_index([("parent", 1), ("visibility", 1)])
+        
+        # Tag filtering and date range queries
         await db[COLLECTION_MEMOS].create_index([("tags", 1)])
         await db[COLLECTION_MEMOS].create_index([("created_at", -1)])
         
-        # Indexes for memo relations
+        # ====================== MEMO RELATIONS ======================
         await db[COLLECTION_MEMO_RELATIONS].create_index([("memo_id", 1)])
         await db[COLLECTION_MEMO_RELATIONS].create_index([("related_memo_id", 1)])
         
-        # Indexes for reactions
-        await db[COLLECTION_REACTIONS].create_index([("memo_id", 1)])
-        await db[COLLECTION_REACTIONS].create_index([("user_id", 1)])
+        # ====================== REACTIONS ======================
+        await db[COLLECTION_REACTIONS].create_index([("content_id", 1)])
+        await db[COLLECTION_REACTIONS].create_index([("creator_id", 1)])
         
-        # Indexes for memo embeddings
-        await db[COLLECTION_MEMO_EMBEDDINGS].create_index([("memo_id", 1)])
-        await db[COLLECTION_MEMO_EMBEDDINGS].create_index([("user_id", 1), ("date", -1)])
+        # ====================== MEMO EMBEDDINGS ======================
+        await db[COLLECTION_MEMO_EMBEDDINGS].create_index([("memo_id", 1)], unique=True, sparse=True)
+        await db[COLLECTION_MEMO_EMBEDDINGS].create_index([("date_key", 1)])
         
-        # Indexes for inbox
-        await db[COLLECTION_INBOX].create_index([("user_id", 1), ("created_at", -1)])
+        # ====================== INBOX ======================
+        await db[COLLECTION_INBOX].create_index([("receiver", 1), ("created_at", -1)])
+        await db[COLLECTION_INBOX].create_index([("receiver", 1), ("status", 1)])
         
-        # Indexes for user settings
+        # ====================== USER SETTINGS ======================
         await db[COLLECTION_USER_SETTINGS].create_index([("user_id", 1)], unique=True)
         
-        logger.info("✅ Database indexes created successfully")
+        # ====================== ACTIVITIES ======================
+        await db["cuccu_activities"].create_index([("created_at", -1)])
+        await db["cuccu_activities"].create_index([("creator_id", 1)])
+        
+        # ====================== NOTIFICATIONS ======================
+        await db["cuccu_notifications"].create_index([("recipient_id", 1), ("created_at", -1)])
+        await db["cuccu_notifications"].create_index([("recipient_id", 1), ("status", 1)])
+        
+        # ====================== MEMO VERSIONS ======================
+        await db["cuccu_memo_versions"].create_index([("memo_id", 1), ("version_index", -1)])
+        
+        logger.info("✅ Database indexes created successfully (Production-ready)")
     except Exception as e:
         logger.warning(f"⚠️  Error creating indexes (may already exist): {e}")
 

frontend/.env

+# ====================== CLERK (PUBLIC KEY ONLY - NO SECRET) ======================
 VITE_CLERK_PUBLISHABLE_KEY=pk_test_Y29tbXVuYWwtc3VuYmVhbS0wLmNsZXJrLmFjY291bnRzLmRldiQ
-CLERK_SECRET_KEY=sk_test_ek7ozVR80Qi9UdvhGaTmlXovS16GDuBDlDrpH1rkyQ
+
\ No newline at end of file
+# ====================== API URL ======================
+VITE_API_URL=http://localhost:8080
\ No newline at end of file