fix(ui): SQL toasts, chrome scale, Redis/Mongo empty states

lib/features/extensions/extension_sql_workspace.dart

@@ -185,7 +185,14 @@ class _ExtensionSqlWorkspaceState
         text: text,
         selection: material.TextSelection.collapsed(offset: text.length),
       );
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to open SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   Future<void> _saveSqlFile() async {
@@ -201,7 +208,14 @@ class _ExtensionSqlWorkspaceState
       final path = location?.path;
       if (path == null || path.isEmpty) return;
       await File(path).writeAsString(_sqlController.text);
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to save SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   @override

lib/features/main_screen/querya_window_title_bar.dart

@@ -1,5 +1,6 @@
 import 'package:bitsdojo_window/bitsdojo_window.dart';
 import 'package:flutter/material.dart' as material;
+import 'package:querya_desktop/core/layout/ui_scale.dart';
 import 'package:querya_desktop/core/storage/local_db.dart';
 import 'package:querya_desktop/core/theme/querya_theme_scope.dart';
 import 'package:querya_desktop/features/connections/driver_manager_dialog.dart';
@@ -75,7 +76,7 @@ class QueryaWindowTitleBar extends StatelessWidget {
     final closeButtonColors = QueryaWindowTitleBar.closeButtonColors(context);
 
     return material.Container(
-      height: 40,
+      height: context.scaled(40),
       color: titleBarBackground(context),
       child: WindowTitleBarBox(
         child: Row(

lib/features/main_screen/results_tab.dart

@@ -9,6 +9,10 @@ import 'package:querya_desktop/shared/widgets/widgets.dart';
 
 /// Query output: grid, loading, error, or placeholder.
 ///
+/// Render order in [_buildBody]: **loading** first (only when [isLoading]),
+/// then **error** when [errorMessage] is non-empty (including when
+/// `isLoading` is false), then status / affected / idle / grid content.
+///
 /// Mode changes (idle / loading / error / status / grid) morph via
 /// [QueryaFadeSlide]. Keys are per **mode**, not per row — so grid data updates
 /// and scroll rebuilds do not re-trigger the transition.

lib/features/mongodb/mongo_stats_view.dart

@@ -249,7 +249,31 @@ class _MongoStatsViewState extends material.State<MongoStatsView> {
     }
 
     final status = _serverStatus;
-    if (status == null) return material.Container(color: cs.background);
+    if (status == null) {
+      return material.Center(
+        child: material.Padding(
+          padding: const material.EdgeInsets.all(32),
+          child: material.Column(
+            mainAxisSize: material.MainAxisSize.min,
+            children: [
+              material.Icon(material.Icons.error_outline_rounded,
+                  size: 48, color: cs.destructive),
+              const Gap(16),
+              const Text('No stats available').large().semiBold(),
+              const Gap(8),
+              const Text('serverStatus returned no data.').muted().small(),
+              const Gap(24),
+              OutlineButton(
+                onPressed: _load,
+                leading: const material.Icon(material.Icons.refresh_rounded,
+                    size: 18),
+                child: const Text('Retry'),
+              ),
+            ],
+          ),
+        ),
+      );
+    }
 
     return material.Container(
       color: cs.background,

lib/features/mysql/mysql_sql_workspace.dart

@@ -284,7 +284,14 @@ class _MysqlSqlWorkspaceState extends material.State<MysqlSqlWorkspace> {
         text: text,
         selection: material.TextSelection.collapsed(offset: text.length),
       );
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to open SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   Future<void> _saveSqlFile() async {
@@ -299,7 +306,14 @@ class _MysqlSqlWorkspaceState extends material.State<MysqlSqlWorkspace> {
       final path = location?.path;
       if (path == null || path.isEmpty) return;
       await File(path).writeAsString(_sqlController.text);
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to save SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   Future<void> _runTxCommand(String sql) async {

lib/features/postgresql/postgres_sql_workspace.dart

@@ -431,7 +431,14 @@ class _PostgresSqlWorkspaceState extends material.State<PostgresSqlWorkspace> {
         text: text,
         selection: material.TextSelection.collapsed(offset: text.length),
       );
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to open SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   Future<void> _saveSqlFile() async {
@@ -446,7 +453,14 @@ class _PostgresSqlWorkspaceState extends material.State<PostgresSqlWorkspace> {
       final path = location?.path;
       if (path == null || path.isEmpty) return;
       await File(path).writeAsString(_sqlController.text);
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to save SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   @override

lib/features/redis/redis_key_editor.dart

@@ -114,9 +114,11 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
     try {
       await widget.connection.selectDatabase(widget.database);
       await widget.connection.set(widget.keyName, _stringController.text);
+      if (!mounted) return;
       setState(() => _success = 'Value saved');
       _clearSuccessAfterDelay();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'Save failed: $e');
     }
   }
@@ -127,6 +129,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.del(widget.keyName);
       widget.onKeyDeleted?.call();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'Delete failed: $e');
     }
   }
@@ -140,11 +143,13 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
         await widget.connection.persist(widget.keyName);
       }
       _ttl = await widget.connection.ttl(widget.keyName);
+      if (!mounted) return;
       setState(() {
         _success = seconds > 0 ? 'TTL set to $seconds seconds' : 'TTL removed';
       });
       _clearSuccessAfterDelay();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'TTL failed: $e');
     }
   }
@@ -156,6 +161,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.hset(widget.keyName, field, value);
       await _load();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'HSET failed: $e');
     }
   }
@@ -166,6 +172,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.hdel(widget.keyName, field);
       await _load();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'HDEL failed: $e');
     }
   }
@@ -177,6 +184,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.rpush(widget.keyName, value);
       await _load();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'RPUSH failed: $e');
     }
   }
@@ -188,6 +196,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.sadd(widget.keyName, member);
       await _load();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'SADD failed: $e');
     }
   }
@@ -198,6 +207,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.srem(widget.keyName, member);
       await _load();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'SREM failed: $e');
     }
   }
@@ -209,6 +219,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.zadd(widget.keyName, score, member);
       await _load();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'ZADD failed: $e');
     }
   }
@@ -219,6 +230,7 @@ class _RedisKeyEditorState extends material.State<RedisKeyEditor> {
       await widget.connection.zrem(widget.keyName, member);
       await _load();
     } catch (e) {
+      if (!mounted) return;
       setState(() => _error = 'ZREM failed: $e');
     }
   }

lib/features/redis/redis_keys_view.dart

@@ -80,6 +80,7 @@ class _RedisKeysViewState extends material.State<RedisKeysView> {
 
     // One pipelined burst of TYPE+TTL (not N× Future.wait round-trips).
     List<_KeyInfo> infos;
+    String? typeTtlError;
     try {
       final metas = await widget.connection.typesAndTtls(keyNames);
       infos = [
@@ -90,18 +91,21 @@ class _RedisKeysViewState extends material.State<RedisKeysView> {
             ttl: metas[i].ttl,
           ),
       ];
-    } catch (_) {
+    } catch (e) {
+      // Still show keys with unknown type/TTL; surface the failure non-blocking.
       infos = [
         for (final name in keyNames)
           _KeyInfo(name: name, type: 'unknown', ttl: -1),
       ];
+      typeTtlError = 'Failed to load key types/TTLs: $e';
     }
 
     if (!mounted) return;
     setState(() {
       _keys.addAll(infos);
       _cursor = nextCursor;
       _hasMore = nextCursor != 0;
+      if (typeTtlError != null) _error = typeTtlError;
     });
   }
 

lib/features/redis/redis_view.dart

@@ -226,7 +226,31 @@ class _RedisViewState extends material.State<RedisView> {
     }
 
     final info = _info;
-    if (info == null) return material.Container(color: cs.background);
+    if (info == null) {
+      return material.Center(
+        child: material.Padding(
+          padding: const material.EdgeInsets.all(32),
+          child: material.Column(
+            mainAxisSize: material.MainAxisSize.min,
+            children: [
+              material.Icon(material.Icons.error_outline_rounded,
+                  size: 48, color: cs.destructive),
+              const Gap(16),
+              const Text('No stats available').large().semiBold(),
+              const Gap(8),
+              const Text('Redis INFO returned no data.').muted().small(),
+              const Gap(24),
+              OutlineButton(
+                onPressed: _load,
+                leading: const material.Icon(material.Icons.refresh_rounded,
+                    size: 18),
+                child: const Text('Retry'),
+              ),
+            ],
+          ),
+        ),
+      );
+    }
 
     return material.Container(
       color: cs.background,

lib/features/sqlite/sqlite_sql_workspace.dart

@@ -240,7 +240,14 @@ class _SqliteSqlWorkspaceState extends material.State<SqliteSqlWorkspace> {
         text: text,
         selection: material.TextSelection.collapsed(offset: text.length),
       );
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to open SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   Future<void> _saveSqlFile() async {
@@ -255,7 +262,14 @@ class _SqliteSqlWorkspaceState extends material.State<SqliteSqlWorkspace> {
       final path = location?.path;
       if (path == null || path.isEmpty) return;
       await File(path).writeAsString(_sqlController.text);
-    } catch (_) {}
+    } catch (e) {
+      if (!mounted) return;
+      showAppToast(
+        context: context,
+        message: 'Failed to save SQL file: $e',
+        variant: AppToastVariant.error,
+      );
+    }
   }
 
   @override

test/features/main_screen/results_tab_test.dart

@@ -237,6 +237,29 @@ void main() {
       expect(find.text('created_at'), findsOneWidget);
     });
 
+    testWidgets('shows error when isLoading is false', (tester) async {
+      await tester.pumpWidget(
+        resultsShell(
+          child: const material.Scaffold(
+            body: ResultsTab(
+              isLoading: false,
+              errorMessage: 'connection refused',
+            ),
+          ),
+        ),
+      );
+      await tester.pumpAndSettle();
+      expect(
+        find.byKey(const material.ValueKey('results_mode_error')),
+        findsOneWidget,
+      );
+      expect(find.textContaining('connection refused'), findsOneWidget);
+      expect(
+        find.byKey(const material.ValueKey('results_mode_loading')),
+        findsNothing,
+      );
+    });
+
     testWidgets('shows idle / loading / error / grid mode keys', (tester) async {
       await tester.pumpWidget(
         resultsShell(