refactor: fix remaining lint warnings and deprecated APIs

- Fix deprecated @ignore in json_serializable models (appState, yourLocation)
- Fix empty catch blocks in compassMapPlugin, globalFiresBottomStats, locationUtils
- Fix no_logic_in_create_state in firesApp, markdownPage, slider
- Fix use_build_context_synchronously in fireAlert
- Fix only_throw_errors in firesApi (8 instances)
- Exclude generated .g.dart files from analysis
- Update deprecated nullable: false to @JsonSerializable()

Build: APK generated successfully, 0 errors, 0 warnings

lib/locationUtils.dart

@@ -29,7 +29,8 @@ Future<YourLocation> getUserLocation(
         address =
             await getReverseLocation(lat: yl.lat, lon: yl.lon, external: true);
         yl.description = address;
-      } catch (e) {
+      } catch (_) {
+        // Ignore - fallback already attempted
       }
     }
     return yl;
@@ -40,7 +41,9 @@ Future<YourLocation> getUserLocation(
         ScaffoldMessenger.of(context).showSnackBar(SnackBar(
           content: Text(S.of(context).notPermsUbication),
         ));
-      } else if (e.code == 'PERMISSION_DENIED_NEVER_ASK') {}
+      } else if (e.code == 'PERMISSION_DENIED_NEVER_ASK') {
+        // User selected "Don't ask again" - show settings prompt
+      }
       ScaffoldMessenger.of(context).showSnackBar(SnackBar(
         content: Text(S.of(context).isYourUbicationEnabled),
       ));