Mark 7beb69059e feat(02-03): tab-url-tracker — chrome.tabs.onActivated + onUpdated → urls[] with dedup + filter (D-P2-02) ...

- Add src/background/tab-url-tracker.ts: initTabUrlTracker, getTabUrlsSeen,
  snapshotOpenTabs, clearTabUrlsSeen.
- Filter: positive-allow regex ^(https?|chrome-extension):// — INCLUDE
  https + http + chrome-extension://; default-deny chrome://, about:,
  devtools://, file://, blob:, data: (per CONTEXT.md `<specifics>` URL
  filter clause).
- Dedup: Set membership gate + first-seen-ordered array; getTabUrlsSeen
  returns a slice so callers cannot mutate internal state.
- snapshotOpenTabs: defensive chrome.tabs.query({}) enumeration for SAVE-
  time augmentation (DEC-011 Amendment 1 capability). Captures tabs the
  operator opened but never activated.
- Module guards: initialized flag prevents double-listener registration;
  all chrome.tabs.* listener calls wrapped in defensive try/catch matching
  the src/background/index.ts:bootstrap pattern.
- Tier-1 grep-gate preserved (13 entries): NO `_resetForTesting` /
  `_observeForTesting` ergonomic test hooks exported (would have leaked
  into production bundles per tests/background/no-test-hooks-in-prod-
  bundle.test.ts). Tests drive chrome.tabs.onUpdated callbacks directly
  via the chrome stub — Plan 02-01 SUMMARY anticipated this option.

[Rule 3 - Blocking] tests/background/meta-json-urls-schema.test.ts Tests 3+4
extended to wire chrome.tabs.onUpdated callbacks directly (replaces the
optional `_resetForTesting` / `_observeForTesting` skeletons). Test 5
simplified (empty-tracker assertion needs no observation seeding on a
freshly-reset module graph). Test 5 F2 contract preserved verbatim.

Verification:
- npx tsc --noEmit → clean
- npx vitest run tests/background/meta-json-urls-schema.test.ts → 3/5 GREEN
  (Tests 3+4+5 the tracker-contract trio flipped; Tests 1+2 still RED as
  they pin the SessionMetadata + createArchive amendment — Task 2 territory)

2026-05-20 16:06:06 +02:00

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