feat(messaging): add text interaction mode

[huntharo]

Summary

• I added global and per-platform Messaging interaction mode settings with buttons and text options, including TOML/env parsing and Settings UI controls.
• I made text mode render interactive messaging surfaces as voice-friendly text while preserving the original semantic actions for pending-intent routing.
• I added a structured ephemeral model-backed mapper for ambiguous text replies, with a repo-owned prompt, safe action-id validation, pass-through handling, and short clarification prompts.
• I made the mapper prefer the Codex helper-object path used by thread naming, which starts ephemeral gpt-5.4-mini helper threads, and kept Grok object calls as a fallback option.
• I kept deterministic matching first so exact replies do not pay model latency.

Verification

• pnpm --filter @pwragent/desktop typecheck
• pnpm test apps/desktop/src/main/__tests__/codex-client.test.ts apps/desktop/src/main/__tests__/messaging-interaction-mapper.test.ts apps/desktop/src/main/__tests__/messaging-controller.test.ts
• pnpm test apps/desktop/src/main/__tests__/codex-client.test.ts apps/desktop/src/main/__tests__/messaging-interaction-mapper.test.ts apps/desktop/src/main/__tests__/messaging-controller.test.ts apps/desktop/src/main/__tests__/messaging-command-catalog.test.ts apps/desktop/src/main/__tests__/messaging-config.test.ts apps/desktop/src/main/__tests__/desktop-settings-service.test.ts apps/desktop/src/main/__tests__/desktop-settings-patch-translator.test.ts apps/desktop/src/main/__tests__/telegram-adapter.test.ts apps/desktop/src/renderer/src/features/settings/__tests__/settings-patch-delta.test.ts apps/desktop/src/renderer/src/features/settings/__tests__/settings-screen.test.tsx
• pnpm lint:boundaries
• git diff --check

Notes

• This now covers the CarPlay-friendly “say what you mean” path for offered actions. Full hidden multi-turn helper sessions, SOUL.md-style personality files, memory, and visible agent threads remain follow-up plan units.
• I restarted the dev-profile app from this checkout and verified the messaging lease is owned by the new instance.