restore(usage): bring back OpenUsage rate-limits panel + sidebar entry

[aaditagrawal]

Summary

PR #77's merge of upstream's multi-provider SPI silently dropped 9 files for the OpenUsage rate-limits feature. This PR restores them, adapts to upstream's branded SPI, and wires the panel into the sidebar.

Restored from `97f179fd` (9 files)

• `components/RateLimitsPanel.tsx` (collapsible sidebar group)
• `components/RateLimitsPanel.test.tsx`
• `components/RateLimitSummaryList.tsx`
• `components/chat/RateLimitBanner.tsx` (banner — restored, not yet mounted)
• `lib/openUsageRateLimits.ts` + `.test.ts` (local OpenUsage HTTP snapshot parser)
• `lib/openUsageReactQuery.ts` (TanStack Query options)
• `lib/rateLimits.ts` (`account.rate-limited` activity → `ProviderRateLimit[]`)
• `lib/icons.tsx` (lucide aliases — distinct from the app's custom monochrome `Icons.tsx`)

Adaptation

Only API drift: `ProviderKind` → `ProviderDriverKind` (now branded via `ProviderDriverKind.make(...)`).

Wiring

• New `SidebarProjectsContent` prop `threadsWithActivities` typed `readonly Pick<Thread, "activities">[]`.
• Parent computes via `selectThreadsAcrossEnvironments` mapped to activities slice, wrapped in `useShallow` for stable refs.
• Mounts as a `SidebarGroup` between the search row and projects section. Auto-hides when no rate-limit activities have arrived.

Test plan

• `bunx tsc --noEmit` from `apps/web` — exit 0
• `bunx vitest run` from `apps/web` — 995/995 pass (incl. 8 restored OpenUsage tests)
• Manual smoke: trigger a rate-limit response from a provider, confirm panel appears in sidebar

[coderabbitai]

Warning

Rate limit exceeded

@aaditagrawal has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 18 minutes and 12 seconds before requesting another review.

To keep reviews running without waiting, you can enable usage-based add-on for your organization. This allows additional reviews beyond the hourly cap. Account admins can enable it under billing.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d6acca4d-abc9-4e21-a8aa-d30ea8939ff4

📥 Commits

Reviewing files that changed from the base of the PR and between ed24c37 and ce828fa.

📒 Files selected for processing (10)

• apps/web/src/components/RateLimitSummaryList.tsx
• apps/web/src/components/RateLimitsPanel.test.tsx
• apps/web/src/components/RateLimitsPanel.tsx
• apps/web/src/components/Sidebar.tsx
• apps/web/src/components/chat/RateLimitBanner.tsx
• apps/web/src/lib/icons.tsx
• apps/web/src/lib/openUsageRateLimits.test.ts
• apps/web/src/lib/openUsageRateLimits.ts
• apps/web/src/lib/openUsageReactQuery.ts
• apps/web/src/lib/rateLimits.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch restore/openusage-rate-limits

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}