feat: execution failure reports, auto-printer for WMT, UTC timezone fix for all timestamps

app/__init__.py

@@ -29,6 +29,9 @@ def create_app(config_name=None):
     # Register blueprints
     _register_blueprints(app)
     
+    # Register template filters
+    _register_template_filters(app)
+    
     # Register error handlers
     _register_error_handlers(app)
     
@@ -104,6 +107,28 @@ def _register_blueprints(app):
         from app.api.logs import submit_log
         return submit_log()
 
+
+def _register_template_filters(app):
+    """Register custom Jinja2 template filters."""
+    import calendar
+    from datetime import datetime as _dt
+
+    @app.template_filter('local_dt')
+    def local_dt_filter(value, fmt='%Y-%m-%d %H:%M'):
+        """Convert a naive UTC datetime to server local time and format it.
+        Usage: {{ some_utc_datetime | local_dt }}
+               {{ some_utc_datetime | local_dt('%Y-%m-%d %H:%M:%S') }}
+        """
+        if value is None:
+            return None
+        try:
+            # calendar.timegm treats the timetuple as UTC → returns POSIX timestamp
+            # datetime.fromtimestamp then converts to local time using the system timezone
+            ts = calendar.timegm(value.timetuple())
+            return _dt.fromtimestamp(ts).strftime(fmt)
+        except Exception:
+            return value.strftime(fmt)
+
 def _register_error_handlers(app):
     """Register error handlers"""