fix: improve realtime voice wrap-ups and dev startup recovery

[bobleer]

Summary

• Remove 进展： / Progress: prefixes from realtime task updates.
• Show and speak a concise final task outcome that preserves the answer, strips headings/parentheses/boilerplate, and avoids duplicate model wrap-ups.
• Recover macOS desktop development startup when WKWebView retains stale Vite module responses, while revealing the normal error boundary if the one-time retry cannot recover.

Type and Areas

Type:

Regression fix

Areas:

Rust services, Web UI, desktop development startup, realtime voice, i18n

Motivation / Impact

Realtime voice calls now finish with a useful answer in the call popup instead of a short or repetitive status line. Desktop development no longer remains indefinitely on “正在启动 BitFun…” after a stale dynamic module response: Vite development responses are non-persistent, and recognized module-load failures receive one guarded reload.

Verification

• pnpm run fmt:rs
• pnpm --dir src/web-ui exec vitest run src/flow_chat/components/voice/voiceTaskBridge.test.ts src/app/startup/startupModuleRecovery.test.ts src/infrastructure/design-system/DesignSystemViteIntegration.test.ts src/app/startup/startupPerformanceContract.test.ts — 4 files, 67 tests passed
• cargo test -p bitfun-services-integrations --no-default-features --features speech-realtime --lib speech::realtime::tests:: — 4 tests passed
• pnpm run i18n:audit — passed with 0 warnings
• pnpm run check:web — passed; only existing appearance inventory warnings were reported
• pnpm --dir src/web-ui exec eslint src/flow_chat/components/voice/useRealtimeVoiceCall.ts src/flow_chat/components/voice/voiceTaskBridge.ts src/app/App.tsx src/app/startup/startupModuleRecovery.ts vite.config.ts
• cargo build -p bitfun-desktop
• Manual macOS verification: two consecutive pnpm run desktop:dev launches reached the interactive application without opening Web Inspector

Reviewer Notes

• Startup reload recovery is development-only and guarded to one attempt per session; production behavior is unchanged.
• The outcome_spoken result field is additive and tells the realtime model not to repeat a closing brief already delivered by BitFun.
• Remote scenarios: the desktop startup change only affects the local Vite development server. Voice task transport and remote-workspace routing are unchanged. Remote workspace, remote control, Peer Device Mode, and Detached Dispatch were not exercised.

Checklist

• This PR is focused and does not include secrets, temporary prompts, generated scratch files, or unrelated artifacts.
• Relevant verification is recorded above, or skipped checks are explained.
• User-facing strings, docs, and locales are updated where applicable.