feat(openrouter): multi labeled API-key token accounts (port 0.45 #2271)

[Finesssee]

Summary

Port upstream CodexBar 0.45 #2271: enable multiple labeled OpenRouter API keys via the existing token-account switcher.

Changes

• Token accounts: OpenRouter is now a supported token-account provider (OPENROUTER_API_KEY env injection, sk-or-v1-... placeholder).
• Desktop fetch: build_fetch_context prefers the active token-account key over a stored api_keys.json value so account switching is not shadowed by a default key.
• OpenRouter provider: already reads FetchContext.api_key first — no provider logic change required.
• CLI: codexbar account ... openrouter works via support catalog; usage injects the active (or --account label/index) key for env-backed token accounts.
• Tests: multi-key env resolution, labeled --account lookup, and FetchContext precedence (token vs stored).

Stacked multi-account cards remain the existing token-account UI; no new stacked-card surface was added.

Commands run

• cargo test --manifest-path rust/Cargo.toml openrouter_
• cargo test --manifest-path rust/Cargo.toml test_token_account_support
• cargo test --manifest-path apps/desktop-tauri/src-tauri/Cargo.toml fetch_context_openrouter

Notes

• Upstream reference: feat: add OpenRouter token accounts steipete/CodexBar#2271 (ed8c5cef)
• Upstream was not edited

---

^{Need help on this PR? Tag /codesmith with what you need. Autofix is disabled.}

[github-actions]

This repository allows each user to open at most 4 pull requests per 7 days.

Closing this automatically.