fix(remote): align workspace names across mobile surfaces

[wgqqqqq]

Summary

• Normalize remote workspace display names across desktop, mobile-web, and HarmonyOS so host/IP values are not mistaken for workspace names.
• Align the HarmonyOS workspace picker and sidebar with the mobile-web hierarchy: workspace name as the primary label, remote host as secondary metadata, and remote root as browse-only.
• Improve remote workspace browsing and tools-panel states, including connection filtering, loading/error feedback, and path-aware labels.

Validation

• pnpm run fmt:rs
• cargo check -p openbitfun-core --no-default-features --features remote-connect
• cargo check -p openbitfun-desktop
• pnpm --dir src/mobile-web exec tsc --noEmit
• node --test tools/tests/workspace-identity.test.cjs from src/apps/mobile/harmonyos (19 passing)
• Built and installed the HarmonyOS HAP with hdc; verified the workspace picker and sidebar on the connected phone in light mode.

The package-script mobile-web type-check is currently blocked before TypeScript by an existing design-system dependency mismatch: BookSearch is not exported by the installed lucide-react package. Direct tsc --noEmit passes. The mobile-web workspace identity test assertions pass, but its runner reports an asynchronous dependency-cleanup failure for HostDialogQueue.