(CODUX-215) Forward Google Drive context through native dashboard thread compaction

[numnx]

🧩 Task: Forward Google Drive context through native dashboard thread compaction

Automated task PR opened by Code UX for T08.

📋 Summary

Sprint: Sprint 215 · Google Drive project mount integration · Task: T08

Add an opt-in, project-scoped Google Drive sync-directory mount for Docker Project Manager and worker containers, with an idempotent prompt notice, safe read-only defaults, configurable read/write access, and documented settings behavior.

🤖 Model & Provider

Provider	Codex CLI
Model	gpt-5.6-sol

⏱️ Timing

Started	2026-07-11 22:44:30 UTC
Finished	2026-07-11 22:50:31 UTC
Duration	6m 1s

📊 Token Usage

Metric	Value
Input tokens	94,971
Cached input tokens	2,392,320
Output tokens	11,476
Total tokens	2,498,767
Invocations	1
Tool calls	45
Active time	5m 25s

Included usage estimate (subscription/local login): $2.02

✅ QA Review

⏳ QA review runs after this PR is opened. Check the task card in the dashboard for the outcome once it lands.

📝 Full Task Prompt

# Objective
Ensure native dashboard thread compaction receives the same validated Google Drive mount context as other Project Manager containers.

## Scope
- `src/services/chat-thread-runtime-service.ts`
- `tests/backend/services/chat-thread-runtime-service.test.ts`
- Shared provider-execution contracts only where minimally required to preserve native compaction semantics.

## Requirements
1. Route native compaction through the shared provider execution boundary, or add the minimal shared support needed, so Drive resolution is not duplicated.
2. Forward a validated mount only for Docker execution with an existing directory and configured access mode.
3. Preserve `nativeSessionOperation: "compact"`, continuation session IDs, workspace lifecycle, execution records, and result parsing.
4. Add tests for read-only, read-write, invalid/missing paths, and host-mode behavior.

## Verification
- Run `pnpm exec vitest run tests/backend/services/chat-thread-runtime-service.test.ts tests/backend/services/provider-execution-service.test.ts`.
- Run `pnpm run lint`.

🌿 Branch Info

Base: feature/CODUX-215-google-drive-project-mount-integration
Head: task/feature-codux-21-t08-codex-f8f94e76-mrgycax7

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🤖 Generated by Code UX