feat: update roadmap with AI agent performance improvements and custo…

[pikann]

…m branding features

[pullfrog]

✅ No new issues found.

Reviewed changes

Reviewed the full diff of ROADMAP.md (1 file, +2 lines) in this run.

• AI Agent performance item — added a planned (📋) item under Phase 1 → AI Agent Integration: reduce AI agent sandbox container image size and improve startup/runtime performance.
• Custom branding item — added a completed (✅) item under Phase 2 → Core Platform: admin-configurable brand name, logo, favicon, and accent color (light/dark presets), applied across the app shell and login screen.

Both entries use the correct legend markers and are placed in the right sections. I verified the ✅ branding claim is grounded: the backend has the workspace_settings table (migration 000035), a settings service with admin-only PATCH /admin/settings/ and logo/favicon avatar upload routes, and the frontend applies brand name/logo/accent/favicon in the app shell (app-sidebar.tsx, branding-effects.tsx) and login screen (LoginFormPanel.tsx). The 📋 item is planned, so it has no code surface to check.

  ^{｜ Fix it ➔ ｜ View workflow run ｜ Using DeepSeek Flash (free via Pullfrog for OSS) ｜ 𝕏}