Add configurable TIMEZONE for web UI display (UTC storage preserved)

server/main.py

@@ -1,4 +1,4 @@
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 from fastapi.staticfiles import StaticFiles
 from fastapi.middleware.cors import CORSMiddleware
 from contextlib import asynccontextmanager
@@ -6,6 +6,8 @@ from contextlib import asynccontextmanager
 from database import create_tables, run_migrations, SessionLocal
 from auth import create_default_admin
 from routes import auth_router, api_router, web_router
+from settings_store import get_setting
+from timezone_utils import set_current_timezone
 
 
 @asynccontextmanager
@@ -37,6 +39,22 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
+
+@app.middleware("http")
+async def timezone_middleware(request: Request, call_next):
+    """Set current request timezone from DB settings for web rendering."""
+    db = SessionLocal()
+    try:
+        tz = get_setting(db, "TIMEZONE")
+        if tz:
+            set_current_timezone(tz)
+        else:
+            set_current_timezone("UTC")
+    finally:
+        db.close()
+    return await call_next(request)
+
+
 app.include_router(auth_router)
 app.include_router(api_router)
 app.include_router(web_router)