Fix depreciation mirror fallback and TDS compliance routing

app/modules/accounting/tds_ui.py

@@ -130,6 +130,14 @@ async def update_rule(request: Request, rule_id:int):
     finally: db.close()
 
 
+@router.get("")
+@router.get("/")
+def tds_root(request: Request, client_id: int | None = None):
+    """Backward-compatible TDS landing route."""
+    suffix = f"?client_id={int(client_id)}" if client_id else ""
+    return RedirectResponse(url="/tools/accounting/tds/compliance" + suffix, status_code=302)
+
+
 @router.get("/compliance")
 def compliance(request:Request,client_id:int|None=None,tally_guid:str="",date_from:str="",date_to:str="",run:int=0):
     db=CommonSessionLocal()