fix: repair Claude usage config and local accounting

[sarthakagrawal927]

What changed

• Resolve Claude live-usage credentials across configured profile files and macOS Keychain candidates by freshest expiry.
• Include Claude, Codex, and Grok in the pinned ccusage report while keeping Devin separately queried.
• Prevent Devin failures from hiding healthy ccusage data.
• Count cache-creation input in fresh/generated totals.
• Clarify local accounting versus credential-dependent live quota telemetry.
• Bump the desktop release version to v1.9.1.

Root cause

CodeVetter unconditionally preferred the default Claude credentials file even when it was stale and a newer logged-in Keychain/profile credential existed. The ccusage migration also filtered out Grok, coupled Devin failures to the unified dashboard load, and omitted cache-creation tokens from fresh totals.

Validation

• pnpm lint
• TypeScript check
• frontend unit tests and production build
• ccusage sidecar qualification
• cargo fmt and full cargo test: 944 passed, 23 ignored
• docs, complexity, change-size, and diff checks