fix(voice): retain queued transcript routes

[johnmatthewtennant]

Summary

Keeps accepted voice transcripts attached to their chat until they can be delivered safely.

• Retains transcript routes while the composer is temporarily busy.
• Defers transcripts during admission and security blocks without bypassing those checks or consuming the rejection budget.
• Releases routes for read-only, non-Goose, or disabled voice contexts.
• Retries retained native transcripts once their bound chat becomes eligible.

Reviewer example

Speak while the bound chat is temporarily blocked by composer admission. The transcript stays pending without being sent or discarded, then delivers to that same chat after the block clears.

Testing

• just check
• pnpm vitest run src/features/voice-conversation/stores/voiceConversationStore.test.ts src/features/voice-conversation/hooks/useVoiceConversationController.test.ts
• just tauri-check
• just clippy