feat(desktop): multilingual memory retrieval, archive, and management panel (PR 0007)

[tokg-venv]

Summary

Implements spec 0007: upgrade the built-in memory plugin (1.0 → 1.1.0) and add a Settings panel to browse/manage the machine-wide store.

Plugin engine (bun/plugins/memory-plugin-files.ts, self-contained embedded scripts):

• Script-aware tokenization (Unicode script classes, Intl.Segmenter for CJK with bigram fallback, per-script normalization) so Chinese/Japanese/Korean/Arabic/Russian/Thai/Hebrew memories are retrievable.
• Scoring: coverage + whole-term match, origin weighting, 90-day time decay with a floor, optional project boost; scope parameter.
• memory_save: optional id for upsert, normalized dedupe/near-duplicate detection (Jaccard), overflow moves to an archive file instead of being dropped, context.notify on changes.
• Archive file (memories.archive.jsonl) with count + clear entry points; package bumped to 1.1.0 with config.schema.json knobs.

Bun-side store + RPC (bun/memory/index.ts, shared/memory.ts, client/memory.ts):

• list/delete/update/export/clearArchive over the JSONL store; every mutation re-reads before writing so concurrent plugin writes survive.
• DesktopRPCType: memoryList / memoryDelete / memoryUpdate / memoryExport / memoryClearArchive.

UI

• Settings → Memory page: search, project filter, usage/quota, archived count, show/hide/edit/delete with explicit confirms, export, clear archive (en/zh).

Test plan

• seed.test.ts extended: multilingual recall, bigram fallback, dedupe, upsert, archive, boost, decay, upgrade path — 20 plugin tests pass.
• Full apps/desktop + packages/ui suites (439 tests) pass; typecheck:changed / lint:changed clean.

Notes

• Thresholds (coverage ≥ 0.5, projectBoost +4, halfLife 90d, Jaccard ≥ 0.9) are initial values and are exposed via config.schema.json for tuning.
• Export writes an unencrypted JSON beside the store; the panel surfaces explicit confirmations for export/delete/clear-archive.