v0.3.0

• Codex support: new agent backend over the codex app-server, with MCP calls, web searches, and image generation rendered in chat
• Refreshed onboarding, workspace list, and navigation UI
• Applet styles are scoped to their mount; applet bundles and workspace files get proper cache headers
• Scratchpad images are stored as asset files instead of base64 in the snapshot
• Browser image drops accepted up to 32MB and rescaled to fit

Full changelog: v0.2.0...v0.3.0