## Summary

- What changed:
- Why:

## Architecture Plan Sync (Required)

- Master plan file: `/Users/earth/Desktop/waoowaoo/docs/architecture-unification-master-plan.md`
- [ ] I updated the phase status board (`✅/🔄/⏸/⚠️`) in the same PR.
- [ ] I recorded concrete file-level changes under the corresponding phase.
- [ ] I kept the plan date/current-context consistent with the code changes in this PR.

## Phase Status Delta (Required)

| Phase | Before | After | Evidence (file path) |
| --- | --- | --- | --- |
| e.g. Phase 1.2 | 🔄 | ✅ | `src/lib/query/task-target-overlay.ts` |

## Guardrails Checklist (Required)

- [ ] No compatibility layer introduced.
- [ ] No silent fallback introduced.
- [ ] No hidden default or fake data introduced.
- [ ] Errors remain explicit and traceable.

## Validation

- Commands run:
- Manual verification:

## Risks

- Known impact/risk:
- Follow-up tasks:
