Fix: restore Projects and Chats sidebar sections

[xIGBClutchIx]

Summary

This restores separate Projects and Chats sections in Pocodex so project-backed conversations once again render under Projects, matching desktop Codex.

What changed

• read Codex auth identifiers from ~/.codex/auth.json and pass that auth state into the browser bootstrap payload
• seed pocodex_auth_state, host_config, and remote_connections into the shared-object snapshot bridge that the current desktop webview reads during startup
• patch extracted and cached use-auth webview assets so the bundle reads accountId, email, and userId from the Pocodex bridge instead of hardcoded null values
• pass the real desktop version, buildFlavor, and buildNumber through the CLI/runtime and vscode://codex/extension-info bridge path
• add focused regression coverage for auth parsing, bootstrap shared-object snapshots, extension info plumbing, and the webview auth patch path

Root cause

• Pocodex left the desktop auth snapshot empty, so the current use-auth bundle fed null account and user identifiers into the webview
• Pocodex also returned placeholder extension-info, so the current bundle evaluated its grouping gate against the wrong app identity
• once those startup contracts were wrong, project-backed conversations fell through into the Chats list instead of rendering under Projects

Impact

• project folders render under Projects again and Chats stays separate
• the current desktop bundle receives the auth and extension metadata it expects during startup
• focused regressions now cover the restored auth/bootstrap contract and patched webview path

Validation

• pnpm run check:commit
• pnpm exec vitest run test/app-server-bridge-basic.test.ts test/bootstrap-script.test.ts test/codex-bundle.test.ts test/codex-auth.test.ts
• pnpm run build
• node dist/cli.js --dev --listen 127.0.0.1:8822
• live local verification on http://127.0.0.1:8822/ that the left sidebar shows Projects with project folders underneath and a separate Chats section with No chats