feat: Organize public uploads into daily directories based on timezone

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

app/app.py

@@ -33,6 +33,11 @@ try:
 except Exception:
     qrcode = None
 
+try:
+    import pytz
+except ImportError:
+    pytz = None
+
 from app.config import Settings, load_settings
 
 # ---- App & static ----
@@ -256,8 +261,21 @@ def get_or_create_album_dir(album_name: str) -> str:
     """Get or create a directory for an album. Returns the path."""
     if not album_name or not isinstance(album_name, str):
         album_name = "public"
-    safe_album_name = sanitize_filename(album_name)
-    save_dir = os.path.join("./data/uploads", safe_album_name)
+
+    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)
+        except Exception as e:
+            logger.warning("Timezone logic failed, falling back to 'public' album. Timezone: %s. Error: %s", SETTINGS.timezone, e)
+            save_dir = os.path.join("./data/uploads", "public")
+    else:
+        safe_album_name = sanitize_filename(album_name)
+        save_dir = os.path.join("./data/uploads", safe_album_name)
+
     os.makedirs(save_dir, exist_ok=True)
     return save_dir