fix: support OpenClaude Codex auth path and disable broken agent chat

[pedrotecinf]

Summary

This PR fixes two issues affecting EvoNexus when running with openclaude and Codex OAuth:

1. openclaude was installed but not detected because the service/runtime PATH did not include user-local install
   locations such as ~/.npm-global/bin.
2. Agent pages could open the structured Chat UI even when the active provider was codex_auth, but that flow still
   depended on the Anthropic SDK and failed with Not logged in · Please run /login.

What changed

• Extended CLI path resolution to include common user-local bin directories.
• Applied that resolution consistently across:
  • dashboard provider checks/tests
  • terminal session spawning
  • ADW runner execution
  • service startup PATH
• Updated the agent detail page to treat agent Chat as unsupported when the active provider is not native claude.
• Forced agent pages to fall back to Terminal mode under OAuth/OpenClaude until the chat bridge becomes provider-
  aware.
• Added .gitignore entries for local EvoNexus workspace/runtime data to reduce accidental commits of personal
  conversations and logs.

Files changed

• ADWs/runner.py
• dashboard/backend/routes/providers.py
• dashboard/terminal-server/src/claude-bridge.js
• dashboard/frontend/src/pages/AgentDetail.tsx
• start-services.sh
• .gitignore

Behavior before

• Providers page could show 'openclaude' not found in PATH even when it was installed in ~/.npm-global/bin.
• Agent terminal/provider flow could work while agent Chat still failed with:
  • Claude Code returned an error result: Not logged in · Please run /login

Behavior after

• EvoNexus resolves openclaude correctly from common user-local install paths.
• Codex OAuth/OpenClaude users can use agents through Terminal mode without hitting the broken Anthropic chat path.
• The UI now avoids exposing a chat mode that is known not to work for non-Anthropic providers.

Validation

• Verified openclaude --version resolves successfully from the corrected path.
• Restarted services with updated startup PATH.
• Confirmed terminal-server logs show agent PTY sessions starting with openclaude.
• Built the frontend successfully with npm run build.

Notes

This PR does not fully implement provider-aware support for dashboard/terminal-server/src/chat-bridge.js.
It prevents the broken UX path for now. A future PR can make the structured agent chat layer work with openclaude/
Codex OAuth as well.

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