feat(usage): show and redeem free limit resets for cc accounts

Adds the free usage-limit reset (the desktop app's "Reset for free")
to the Quota Tracker for cc OAuth accounts, mirroring the existing
Codex reset-credit button.

- Reset button with remaining count on the card; tooltip shows use-by
  date and which limits get refilled.
- Expiry modal (clock button) listing each grant: label, resets left,
  refills (session / weekly), use-by date, time remaining, status.
- Confirm dialog before redeeming, since a reset is irreversible.
- Usage and reset calls send the CLI User-Agent required for cedar_ember.
- Usage cache is dropped after a redeem so the card shows the refilled limits.

open-sse/services/usage.js

@@ -4,10 +4,10 @@
 
 import { getGitHubUsage } from "./usage/github.js";
 import { getGeminiUsage, getAntigravityUsage } from "./usage/google.js";
-import { getClaudeUsage } from "./usage/claude.js";
+import { getClaudeUsage, consumeClaudeResetGrant } from "./usage/claude.js";
 import { getCodexUsage, consumeCodexRateLimitResetCredit, getCodexRateLimitResetCredits } from "./usage/codex.js";
 
-export { consumeCodexRateLimitResetCredit, getCodexRateLimitResetCredits };
+export { consumeCodexRateLimitResetCredit, getCodexRateLimitResetCredits, consumeClaudeResetGrant };
 import { getKiroUsage } from "./usage/kiro.js";
 import { getMiniMaxUsage } from "./usage/minimax.js";
 import { getCodeBuddyCnUsage, getCodeBuddyIntlUsage } from "./usage/codebuddy-cn.js";