fix(i18n): enforce complete localized coverage

lib/widgets/companion_remote/remote_session_dialog.dart

@@ -64,7 +64,7 @@ class _RemoteSessionDialogState extends State<RemoteSessionDialog> with MountedS
     } catch (e) {
       setStateIfMounted(() {
         _isStarting = false;
-        _errorMessage = e.toString();
+        _errorMessage = t.companionRemote.errors.serverStartFailed(error: e.toString().replaceFirst('Exception: ', ''));
       });
     }
   }
@@ -113,15 +113,7 @@ class _RemoteSessionDialogState extends State<RemoteSessionDialog> with MountedS
           if (_errorMessage != null) {
             return AlertDialog(
               title: Text(t.common.error),
-              content: Column(
-                mainAxisSize: .min,
-                crossAxisAlignment: .start,
-                children: [
-                  Text(t.companionRemote.session.failedToCreate),
-                  const SizedBox(height: 8),
-                  Text(_errorMessage!, style: const TextStyle(fontFamily: 'monospace')),
-                ],
-              ),
+              content: Text(_errorMessage!, style: const TextStyle(fontFamily: 'monospace')),
               actions: [
                 FocusableButton(
                   autofocus: true,

lib/widgets/tv_color_picker.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
+import '../i18n/strings.g.dart';
 import '../focus/dpad_navigator.dart';
 import '../focus/focus_theme.dart';
 import '../focus/focusable_text_field.dart';
@@ -124,6 +125,7 @@ class _TvColorPickerState extends State<TvColorPicker> with ControllerDisposerMi
         const SizedBox(height: 16),
         _ColorChannelRow(
           label: 'H',
+          semanticLabel: Translations.of(context).accessibility.hue,
           value: _hue,
           min: 0,
           max: 360,
@@ -139,6 +141,7 @@ class _TvColorPickerState extends State<TvColorPicker> with ControllerDisposerMi
         const SizedBox(height: 8),
         _ColorChannelRow(
           label: 'S',
+          semanticLabel: Translations.of(context).accessibility.saturation,
           value: _saturation,
           min: 0,
           max: 100,
@@ -153,6 +156,7 @@ class _TvColorPickerState extends State<TvColorPicker> with ControllerDisposerMi
         const SizedBox(height: 8),
         _ColorChannelRow(
           label: 'V',
+          semanticLabel: Translations.of(context).accessibility.brightness,
           value: _value,
           min: 0,
           max: 100,
@@ -168,7 +172,11 @@ class _TvColorPickerState extends State<TvColorPicker> with ControllerDisposerMi
         FocusableTextField(
           controller: _hexController,
           focusNode: _hexFocusNode,
-          decoration: const InputDecoration(prefixText: '#', labelText: 'Hex', border: OutlineInputBorder()),
+          decoration: InputDecoration(
+            prefixText: '#',
+            labelText: Translations.of(context).accessibility.hexColor,
+            border: const OutlineInputBorder(),
+          ),
           maxLength: 6,
           inputFormatters: [FilteringTextInputFormatter.allow(RegExp(r'[0-9a-fA-F]'))],
           onChanged: _onHexChanged,
@@ -184,6 +192,7 @@ class _TvColorPickerState extends State<TvColorPicker> with ControllerDisposerMi
 /// UP/DOWN are ignored so focus traverses normally between rows.
 class _ColorChannelRow extends StatefulWidget {
   final String label;
+  final String semanticLabel;
   final int value;
   final int min;
   final int max;
@@ -197,6 +206,7 @@ class _ColorChannelRow extends StatefulWidget {
 
   const _ColorChannelRow({
     required this.label,
+    required this.semanticLabel,
     required this.value,
     required this.min,
     required this.max,
@@ -317,7 +327,7 @@ class _ColorChannelRowState extends State<_ColorChannelRow> with KeyRepeatHelper
             _ChannelButton(
               icon: Symbols.remove_rounded,
               onPressed: canDecrement ? _decrement : null,
-              semanticLabel: 'Decrease ${widget.label}',
+              semanticLabel: Translations.of(context).accessibility.decreaseValue(label: widget.semanticLabel),
             ),
             const SizedBox(width: 8),
             Container(
@@ -329,7 +339,7 @@ class _ColorChannelRowState extends State<_ColorChannelRow> with KeyRepeatHelper
             _ChannelButton(
               icon: Symbols.add_rounded,
               onPressed: canIncrement ? _increment : null,
-              semanticLabel: 'Increase ${widget.label}',
+              semanticLabel: Translations.of(context).accessibility.increaseValue(label: widget.semanticLabel),
             ),
           ],
         ),

lib/widgets/tv_number_spinner.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
+import '../i18n/strings.g.dart';
 import '../focus/dpad_navigator.dart';
 import '../focus/focus_theme.dart';
 import '../focus/input_mode_tracker.dart';
@@ -155,7 +156,7 @@ class _TvNumberSpinnerState extends State<TvNumberSpinner> with KeyRepeatHelper<
               onPressed: canDecrement ? _decrement : null,
               onLongPressStart: canDecrement ? () => startRepeat(_decrement) : null,
               onLongPressEnd: stopRepeat,
-              semanticLabel: 'Decrease',
+              semanticLabel: Translations.of(context).accessibility.decrease,
             ),
             const SizedBox(width: 16),
             Container(
@@ -172,7 +173,7 @@ class _TvNumberSpinnerState extends State<TvNumberSpinner> with KeyRepeatHelper<
               onPressed: canIncrement ? _increment : null,
               onLongPressStart: canIncrement ? () => startRepeat(_increment) : null,
               onLongPressEnd: stopRepeat,
-              semanticLabel: 'Increase',
+              semanticLabel: Translations.of(context).accessibility.increase,
             ),
           ],
         ),