fix(ui): Sync phaseModels to server when changed

Previously, phaseModels only persisted to localStorage but the server
reads from settings.json file. Now setPhaseModel/setPhaseModels/resetPhaseModels
call syncSettingsToServer() to keep server-side settings in sync.

Also added phaseModels to the syncSettingsToServer() updates object.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/hooks/use-settings-migration.ts

@@ -223,6 +223,7 @@ export async function syncSettingsToServer(): Promise<boolean> {
       muteDoneSound: state.muteDoneSound,
       enhancementModel: state.enhancementModel,
       validationModel: state.validationModel,
+      phaseModels: state.phaseModels,
       autoLoadClaudeMd: state.autoLoadClaudeMd,
       keyboardShortcuts: state.keyboardShortcuts,
       aiProfiles: state.aiProfiles,