Add management tabs for diagnostics and related pages

[KillariDev]

Summary

• Introduce a unified management view with tabs for Websites, Address Book, Simulation Stack, Diagnostics, and Settings.
• Add a new Diagnostics page with summary counters, copy/clear actions, and detailed error records.
• Route popup entry points through tab targets so management pages open in the correct tab and hash state.
• Improve dynamic scroller and hash handling so hidden tab panels and navigation updates render reliably.

Testing

• bun test
• bun run setup-chrome
• bun run typecheck
• bun run lint