fix(settings): let fixed-width controls scale with font size and density

Merge main and resolve conflicts in RemoteInstancesPage.tsx (re-applied
the width bumps by hand at their current locations) and
KeyboardShortcutsSettings.tsx (dropped the PR's hunk entirely: main
replaced that fixed-width input with ShortcutRecordingDialog, which has
no equivalent clipping at 200% interface font size).

Closes #2320

packages/ui/src/components/sections/behavior/BehaviorPage.tsx

@@ -21,7 +21,7 @@ import {
 } from '@/lib/responseStyle';
 import type { DesktopSettings } from '@/lib/desktop';
 import { runtimeFetch } from '@/lib/runtime-fetch';
-import { reloadOpenCodeConfiguration } from '@/stores/useAgentsStore';
+import { noteDeferredRestartFromPayload, recordDeferredOpenCodeRestart } from '@/lib/opencode/deferredRestart';
 import { SettingsPageLayout } from '@/components/sections/shared/SettingsPageLayout';
 import {
   SettingsSection,
@@ -243,13 +243,20 @@ export const BehaviorPage: React.FC = () => {
         throw new Error(await readApiError(response, t('settings.behavior.page.toast.saveFailed')));
       }
 
+      const payload = await response.json().catch(() => null);
+      const deferred = noteDeferredRestartFromPayload(payload, 'behavior', { id: 'agents-md' });
+
       await saveBehaviorSetting({
         globalBehaviorPrompt: content,
       }, t('settings.behavior.page.toast.saveFailed'));
 
       setPrompt(content);
       setInitialPrompt(content);
-      toast.success(t('settings.behavior.page.toast.saved'));
+      toast.success(
+        deferred
+          ? t('settings.view.pendingRestart.saved')
+          : t('settings.behavior.page.toast.saved'),
+      );
     } catch (error) {
       console.error('Failed to save behavior:', error);
       const message = error instanceof Error ? error.message : t('settings.behavior.page.toast.saveFailed');
@@ -267,19 +274,8 @@ export const BehaviorPage: React.FC = () => {
         t('settings.behavior.page.toast.saveFailed'),
       );
       setInitialOptimizeSystemPrompt(optimizeSystemPrompt);
-    } catch (error) {
-      const message = error instanceof Error ? error.message : t('settings.behavior.page.toast.saveFailed');
-      toast.error(message);
-      setIsApplyingPromptOptimization(false);
-      return;
-    }
-
-    try {
-      await reloadOpenCodeConfiguration({
-        message: t('settings.behavior.page.systemPromptOptimization.restarting'),
-        mode: 'projects',
-        scopes: ['all'],
-      });
+      recordDeferredOpenCodeRestart('behavior', { id: 'optimize-system-prompt' });
+      toast.success(t('settings.view.pendingRestart.saved'));
     } catch (error) {
       const message = error instanceof Error ? error.message : t('settings.behavior.page.toast.saveFailed');
       toast.error(message);
@@ -318,7 +314,7 @@ export const BehaviorPage: React.FC = () => {
           >
             {isApplyingPromptOptimization
               ? t('settings.common.actions.saving')
-              : t('settings.openchamber.opencodeCli.actions.saveAndReload')}
+              : t('settings.common.actions.saveChanges')}
           </Button>
         </SettingsSection>
       )}