feat(accounts): add dashboard action for account force-probe

[Komzpa]

Summary

• Wire the existing per-account probe backend endpoint (POST /api/accounts/{accountId}/probe) into the Accounts dashboard.
• Add the frontend schema/client method, mutation, and MSW handler coverage for force-probe.
• Add a Force probe button to the account detail action surface while preserving the newer routing policy, Trusted Access, limit warm-up, and upstream proxy controls from current main.
• Refresh account list, account trends, per-account trend detail, and dashboard queries after a successful force-probe.
• Keep Force probe disabled for paused, deactivated, and re-auth-required accounts that the backend rejects.

Stack relationship

• Remains separate from fix(proxy): queue HTTP bridge gate waits #892 because this is a dashboard/account-control feature, while fix(proxy): queue HTTP bridge gate waits #892 is the Responses HTTP bridge admission/stream contract bundle.
• Remains separate from fix(models): hide unsupported API models #887 because this does not touch model catalog visibility or public model metadata.
• Does not absorb or supersede another open PR.

Closes #677

Validation

• uv run openspec validate add-account-probe-endpoint --strict
• cd frontend && bun run test src/features/accounts/components/account-actions.test.tsx src/features/accounts/components/account-detail.test.tsx src/features/accounts/hooks/use-accounts.test.ts src/features/accounts/schemas.test.ts src/test/mocks/handler-coverage.test.ts
• cd frontend && bun run test src/features/accounts/components/accounts-page.test.tsx
• cd frontend && bun run test:coverage
• cd frontend && bun run typecheck
• cd frontend && bun run lint

Current head: 6aec65730b15f4a934db0daf6c3ed5e14a4d8fb4
GitHub CI: pending on current head after the test-fixture fix push.

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Codex Review: Didn't find any major issues. Keep them coming!

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Codex Review: Didn't find any major issues. Chef's kiss.

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