fix: add timezone_offset valve for local date resolution

litellm_dashboard.py

@@ -5,7 +5,7 @@ author_url: https://rin.captcouch.xyz
 description: Check LiteLLM proxy health + auth status and get cost breakdowns with configurable timerange. Two functions, that's it.
 required_open_webui_version: 0.4.0
 requirements: requests
-version: 1.2.0
+version: 1.2.1
 licence: MIT
 """
 
@@ -34,6 +34,10 @@ class Tools:
             default=True,
             description="Default behavior for zero-spend model filtering. When True, models with sub-$0.001 spend are hidden by default and summarized. The per-call hide_zero_spend parameter can override this.",
         )
+        timezone_offset: int = Field(
+            default=0,
+            description="Timezone offset from UTC in hours (e.g. -4 for EDT, -5 for EST). Used for natural language date resolution (today, yesterday).",
+        )
 
     def _headers(self) -> dict:
         """Build auth headers from valves."""
@@ -54,7 +58,8 @@ class Tools:
         Falls back to passthrough if already YYYY-MM-DD or unrecognized.
         """
         date_str = date_str.strip().lower()
-        today = datetime.utcnow().date()
+        # Apply timezone offset to UTC now to get "local" today
+        today = (datetime.utcnow() + timedelta(hours=self.valves.timezone_offset)).date()
 
         # Direct shortcuts
         if date_str == "today":