chore: remove dead code from durable stream migration

[saddlepaddle]

Summary

• Remove unused oauthCredentials column and OAuthCredentialEntry type from local-db settings schema (never read or written anywhere)
• Remove dead useChatPresence hook — calls /login and /logout endpoints that don't exist in the API route handler
• Remove dead auth helpers (buildClaudeEnv, hasClaudeCredentials, getExistingClaudeCredentials) — never called by any code

Test plan

• Typecheck passes (bunx tsc --noEmit on durable-session, desktop, local-db)
• Desktop app builds and runs normally

Summary by CodeRabbit

• Refactor
  • Simplified Anthropic credential handling by removing several exported auth helpers.
  • Removed chat presence hook and related public types (presence/collaboration features).
  • Adjusted durable-session public API to expose durable chat types and hide presence symbols.
  • Removed OAuth credential storage schema from local database.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📝 Walkthrough

Walkthrough

This PR removes Anthropic credential orchestration helpers (getExistingClaudeCredentials, buildClaudeEnv, hasClaudeCredentials), deletes the useChatPresence hook and its types, updates durable-session exports to expose useDurableChat symbols, and removes OAuth credential storage from the local DB schema. (49 words)

Changes

Cohort / File(s)	Summary
Anthropic Auth Credential Orchestration apps/desktop/src/main/lib/agent-manager/utils/anthropic/auth/auth.ts, apps/desktop/src/main/lib/agent-manager/utils/anthropic/auth/index.ts	Removed exported orchestration functions getExistingClaudeCredentials, buildClaudeEnv, hasClaudeCredentials and associated env/credential-resolution logic; retained getCredentialsFromConfig and getCredentialsFromKeychain.
Durable Session — Chat Presence Implementation packages/durable-session/src/react/useChatPresence/useChatPresence.ts, packages/durable-session/src/react/useChatPresence/index.ts	Deleted the entire useChatPresence hook and its public types (ChatUserPresence, ChatAgentPresence, UseChatPresenceOptions, UseChatPresenceReturn) including subscription and POST side-effect logic.
Durable Session — Public API Surface packages/durable-session/src/react/index.ts	Removed re-exports from useChatPresence; added re-exports from useDurableChat (e.g., ModelOption, SessionConfig, SlashCommand, useDurableChat and related types).
Local DB Schema packages/local-db/src/schema/schema.ts	Removed exported OAuthCredentialEntry type and the oauth_credentials JSON column from the settings table.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• feat(desktop): add Claude binary bundling and AI chat tRPC router #1204 — Adds the same credential orchestration functions (getExistingClaudeCredentials, buildClaudeEnv, hasClaudeCredentials) in ai-chat auth utils; likely conflicts with these removals.
• Add agent hooks for chat gui #1303 — Calls buildClaudeEnv / anthropic credential helpers; this PR's removals may break that usage.
• Fix claude settings hooks + refactor agents-setup #439 — Touches Claude credential/settings handling and wrapper hooks; related to credential surface changes here.

Poem

🐰 I nibble lines of code with care,

Trimmed the clutter, light as air,
Claudes and presence hopped away,
OAuth burrowed out of play,
A tidy burrow, sprint and share.

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main objective of removing dead code from the durable stream migration.
Description check	✅ Passed	The description adequately covers the main changes (removed code and types) and includes a test plan with specific verification steps.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing Touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/remove-dead-code

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[github-actions]

🧹 Preview Cleanup Complete

The following preview resources have been cleaned up:

• ✅ Neon database branch
• ✅ Electric Fly.io app

Thank you for your contribution! 🎉