refactor: clean up 55 lint warnings and issues

- Remove all 31 avoid_print debug statements across codebase
- Fix 8 critical warnings (unused variables, unreachable defaults, etc)
- Update deprecated APIs: launch() → launchUrl(), textScaleFactor → textScaler
- Replace deprecated surfaceVariant → surfaceContainerHighest in Material 3 themes
- Refactor switch statements to use modern pattern matching
- Remove unused code: _showDialog, _initNoLocation, _getAnchorOffset
- Fix use_build_context_synchronously by adding mounted checks
- Add ignore_for_file annotations to generated JSON serialization files
- Fix type annotations in appState.dart and models

Warnings reduced from 301 to 246 issues (8 → 0 critical warnings).
Build verified: app-production-debug.apk (160MB) compiles successfully.
Zero type errors, Dart analysis clean for critical issues.

lib/models/firesApi.dart

@@ -14,7 +14,6 @@ import 'falsePositiveTypes.dart';
 import 'yourLocation.dart';
 
 class FiresApi {
-
   FiresApi() {
     _dio = Dio();
   }
@@ -52,7 +51,8 @@ class FiresApi {
             response.data['data']['subscriptions'] as List<dynamic>;
         final List<YourLocation> subscribed = <YourLocation>[];
         for (int i = 0; i < dataSubscriptions.length; i++) {
-          final Map<String, dynamic> el = dataSubscriptions[i] as Map<String, dynamic>;
+          final Map<String, dynamic> el =
+              dataSubscriptions[i] as Map<String, dynamic>;
           final double lat = (el['location']['lat'] as num).toDouble();
           final double lon = (el['location']['lon'] as num).toDouble();
           subscribed.add(YourLocation(
@@ -86,7 +86,6 @@ class FiresApi {
       if (response.statusCode == 200) {
         return response.data['data']['subsId'] as String;
       } else {
-        print(response.data);
         throw 'Unexpected error on subscribe';
       }
     } catch (e) {
@@ -125,15 +124,13 @@ class FiresApi {
         final resultDecoded = response.data;
         final int numFires = (resultDecoded['real'] as num).toInt();
         final List<dynamic> fires = resultDecoded['fires'] as List<dynamic>;
-        final List<dynamic> falsePos = resultDecoded['falsePos'] as List<dynamic>;
-        final List<dynamic> industries = resultDecoded['industries'] as List<dynamic>;
+        final List<dynamic> falsePos =
+            resultDecoded['falsePos'] as List<dynamic>;
+        final List<dynamic> industries =
+            resultDecoded['industries'] as List<dynamic>;
 
         if (globals.isDevelopment) {
-          final int firesCount = fires.length;
-          final int industriesCount = industries.length;
-          final int falsePosCount = falsePos.length;
-          print(
-              '(Pos: $lat, $lon) real: $numFires, fire: $firesCount falsePos: $falsePosCount industries: $industriesCount');
+          // Could log: fires: ${fires.length} falsePos: ${falsePos.length} industries: ${industries.length}
         }
         return UpdateFireMapStatsAction(
             numFires: numFires,