fix: preserve scoped Android snapshot refs

[thymikee]

Summary

Fix Android scoped snapshots so snapshot -s @ref resolves against the prior ref source without double-filtering by the raw ref.
Render hidden-below list hints after visible descendants and keep scoped snapshot fallback state from leaking after unrelated snapshot refreshes.

Review and CI follow-up: centralized session snapshot replacement through setSessionSnapshot, cleared the scope source for replay-heal refreshes too, moved scoped-ref coverage into a focused test file to keep Fallow clean, and updated the stale find metadata expectation.

Touched files: 15. Scope stayed within snapshot/session formatting and session snapshot refresh paths.

Validation

• pnpm exec vitest run src/daemon/handlers/__tests__/find.test.ts
• pnpm exec vitest run src/daemon/handlers/__tests__/snapshot-scoped-refs.test.ts
• pnpm exec vitest run src/daemon/handlers/__tests__/snapshot-handler.test.ts
• pnpm format
• pnpm check:quick
• pnpm check:fallow
• pnpm check:unit

[github-actions]

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Invalidate stale scope source before resolving @refs

resolveSnapshotScope now falls back to session.snapshotScopeSource, but that cache is not invalidated on every snapshot-refresh path (for example, replay healing rewrites session.snapshot in src/daemon/handlers/session-replay-heal.ts without clearing snapshotScopeSource). In flows like scoped snapshot -> replay heal (replay -u) -> snapshot -s @ref, ref lookup can resolve against stale pre-heal nodes and scope to the wrong label instead of the current tree, which makes subsequent snapshot results inconsistent with the live UI.

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[thymikee]

Addressed this in the latest push. Replay heal now uses the centralized setSessionSnapshot helper, which clears snapshotScopeSource whenever it replaces session.snapshot. I also added a regression test in replay-heal.test.ts that seeds a stale scope source, runs heal snapshot refresh, and asserts the source is cleared.