fix(platform): localize activity log counts

[yannickmonney]

Activity log counts used the number helper's English default even after the app language changed. Pass the active locale from the existing locale context to all four summary cards and the shared category/top-actor row, keeping the helper API unchanged.

Add a mounted-language-switch regression using real EN/DE/FR catalogs: German 1.310, French 1 310 (U+202F) and English 1,310. Preserve period, empty/loading filter and parent logs-page controls, and register the automated coverage.

Verified locally (LIGHT):

• Targeted activity-view and parent logs-page component suites: 19/19 passed, one worker under /opt/node/bin/node. Review-only Vite filesystem allowance admits existing shared font assets.
• Regression fails against unchanged main; scoped TypeScript diagnostics for both source/test pairs: 0.
• Scoped type-aware oxlint, oxfmt check, diff whitespace and platform manual register gate: passed.
• Built production-component fixture with only the summary query replaced: Chromium readback passed DE/FR/EN on all surfaces; visual-aspect-analyzer baseline and fixed fixture both 100/100, 16 detected elements.
• Automation-register anchor checked using git merge-tree against all 75 open PR heads (73 modify the register): no newly introduced register conflicts.
• Local SAST wrapper skipped because its pinned scanner is not cached; CI owns that remaining scan.

Closes #3635

TALE-180. Independent nonauthor review is still required. GitHub Actions was reported stalled under incident 3q1yb5m7ltvb; no CI reruns will be requested.

Current-main rebase

Replayed the previously accepted source 15cf5c050cba2c787446c33a100f87cfee60f8ec onto main d1373d84cd56972501403f62145ec52e6f65d44a, including the merged shared CI repair in #4625. The accepted feature payload and all current-main changes are preserved in one atomic commit. Configured commit and conflict checks pass; earlier behavioral proof remains recorded above. All seven native required checks and full merge-group validation remain required for this new source.

Maintenance replay: preserves the accepted feature payload on main fd277c4, including merged #4649, #4650 and #4655. Retains the exact independently accepted one-line shared CLI inventory repair from #4654 (252f0df), pending native merge on main. The #4282 task-register union, where applicable, retains the accepted feature row and current-main rows. Existing behavioral evidence remains recorded above; no fresh full-feature/full-workspace or hosted-green claim. All seven native required contexts and full merge-group validation remain mandatory.

[yannickmonney]

TALE-180 / TALE-359 fleet handoff: implementation ready for nonauthor review.

PR: #4404
Commit: 349fd2b
Closes #3635.

ActivityLogView now supplies the existing active locale to every formatNumber call: four summary cards and the category/top-actor BreakdownRow. The shared helper API remains unchanged.

Verification: 19 targeted component tests passed (activity view + importing logs page, one worker); regression failed against main; scoped source/test types reported zero diagnostics; type-aware oxlint, oxfmt, diff check and platform manual register gate passed. Chromium rendered DE 1.310, FR 1 310 (U+202F) and EN 1,310 across all surfaces with real catalogs and design controls. Query boundary alone used controlled data. Baseline/fixed visual-aspect-analyzer scored 100/100 with 16 detected elements, zero defects. The standalone fixture reserves its root and waits for fonts to avoid fixture startup artifacts.

Manual automation register anchor compared with 75 open PR heads using git merge-tree: 73 change that register; 22 have pre-existing register conflicts against main; this branch introduces zero new register conflicts.

GitHub Actions checks are queued, consistent with the dispatch's incident 3q1yb5m7ltvb. No CI reruns requested. The local SAST wrapper skipped because its pinned scanner was not cached; CI Opengrep remains pending. Independent nonauthor review and green CI remain open.

Workspace task reporting unavailable: workspace_status returned not_granted. This comment is the authorized fallback for the TALE-180/TALE-359 handoff; no task was changed directly.

[yannickmonney]

Independent exact-head review: #4404 at 349fd2ba4367a2928d6bbad6090a00bc0ac889be

Verdict: ACCEPT. I found no blocking findings. CI is pending: Actions is stalled (incident 3q1yb5m7ltvb), and I did not rerun anything.

Reviewer: agent #3 (Claude), task TALE-934. The author is Codex #8 (run ea8f9f05), so this review is independent. I re-read the head right before posting, and it is unchanged. The merge base is dd1cb498.

Checks

1. Every count follows the active locale. All three surfaces now format their counts with locale from useLocale() (@tale/ui/i18n/locale-provider, the provider the app shell mounts):

   • the four summary cards (totalActions, successCount, failureCount, deniedCount, activity-log-view.tsx:196–208);
   • the category breakdown and the top actors, which both render through BreakdownRow (:70, also used by the loading skeleton rows).

   These are all 5 formatNumber calls in the view, and none of them still lacks a locale.

2. Rendering. Node 24.21.0 with ICU 78.3 gives de 1.310, fr 1 310 (U+202F, as Intl renders it) and en 1,310. The test matches those exact strings with an identity normalizer. I checked the bytes: the FR fixtures do contain U+202F.

3. The shared helper is unchanged. There is no diff from the merge base to the head in services/platform/lib/utils/format/ or packages/ui/src/i18n/, and main hasn't touched number.ts since the merge base. The signature is still formatNumber(value, locale = defaultLocale, options?).

4. The register anchor doesn't collide (git merge-tree, run against all 79 other open PR heads):

   • Every automation.md conflict I found also appears between that PR and origin/main, so none of them comes from #4404.
   • #4404 merges into main cleanly.

5. Tests (one worker, /opt/node/bin/node, existing dependencies hard-linked; Vite didn't refuse any asset, so no fs config was needed): activity-log-view.test.tsx plus its importer audit-logs-page.test.tsx pass 19/19 in 52 s.

6. Controls (each with the test kept at the head):

   Variant	New locale test
   View at the merge base	fails at 5.240
   locale dropped from BreakdownRow only	fails, 2 of 4 matches
   dropped from the total card only	fails at 5.240
   dropped from the success card only	fails at 2.620
   dropped from the failure card only	fails, 3 of 4 matches
   dropped from the denied card only	fails, 3 of 4 matches
   head restored	4/4 pass, clean tree

   The test therefore catches a missing locale at each of the five calls.

7. Lint, format and types. oxlint 1.79.0 --type-aware --type-check on the view and the test is clean (39 s). oxfmt 0.64.0 --check is clean; .md files are outside oxfmt's targets.

Non-blocking note: whichever of #4404 and #4384 lands second needs a small resolution

#4384 (c7079740, "show activity summary read failures") edits the same view and test.

• The view merges cleanly, and all 5 locale arguments survive the merge.
• The test file has an append/append conflict, which does not occur against main.

I did a trial merge, review-only and aborted afterwards, and resolved it by keeping both blocks: close the count-locales describe before #4384's top-level it.

• At runtime, 5/5 tests pass.
• The type-aware check reports TS2739 at #4404's fixture (activity-log-view.test.tsx:134): under #4384's hoisted type, read.current is missing isError and refetch.
• Adding isError: false, refetch: vi.fn() to that fixture makes the check clean.

Observations (not findings)

• useLocale().locale is the provider's tag as detected. A region tag such as de-CH passes isValidLocale and renders 1'310, which is what Intl produces for that tag.
• Other analytics views still call formatNumber without a locale (automation-summary-cards.tsx, chat-health-metrics-page.tsx, external-turns-metrics-page.tsx, …). They are outside #3635's scope; they could be a follow-up.

CI

The 21:45Z snapshot, which I read once and did not rerun:

• Workflows: 7 created at 21:20:59Z. Six are queued and SAST is in progress.
• Check runs: 5 success, 12 skipped, 1 in progress, 19 queued.
• Combined status: pending.

I did not push, merge, rerun anything or change any status. The logs, mutation-check.sh and the merge-tree table are in the TALE-934 delivery box.