refactor: Simplify pytz import and remove conditional checks

app/app.py

@@ -17,6 +17,7 @@ import hashlib
 import os
 import sqlite3
 import binascii
+import pytz
 from datetime import datetime
 from typing import Dict, List, Optional
 
@@ -33,11 +34,6 @@ try:
 except Exception:
     qrcode = None
 
-try:
-    import pytz
-except ImportError:
-    pytz = None
-
 from app.config import Settings, load_settings
 
 # ---- App & static ----
@@ -264,8 +260,6 @@ def get_or_create_album_dir(album_name: str) -> str:
 
     if album_name == "public":
         try:
-            if not pytz:
-                raise ImportError("pytz is not installed")
             tz = pytz.timezone(SETTINGS.timezone)
             today = datetime.now(tz).strftime('%Y-%m-%d')
             save_dir = os.path.join("./data/uploads", "public", today)