Browser inside the command center

Droid gets an embedded Chromium browser side panel, plus the first serious round of browser-agent integration work.

This is the release where the browser stops being “open a separate thing somewhere else” and starts becoming a workspace surface agents can eventually use.

• Added embedded Chromium browser side panel
• Added browser control features with MCP integration
• Updated release packaging for bundled CEF
• Avoided duplicate release app rpaths
• Improved browser and agent integration fixes

Agent and workspace polish

• Added agent session bookmarks
• Fixed agent history titles
• Showed Droid resource usage
• Fixed macOS Tahoe chrome controls
• Enhanced notification handling with new policies and coalescing logic