feat: display remote control link in session detail

[mirchaemanuel]

Summary

• Extract remote control URL from bridge_status JSONL entries in Claude sessions
• Display the remote control link in all three interfaces: TUI, GUI (Svelte), and REST API
• Click-to-copy functionality with inline "copied!" indicator in GUI

Changes

• Add RemoteURL field to Session struct
• Parse bridge_status entries in Claude JSONL provider to extract remote URL
• Expose remote_url in REST API session detail endpoint
• Show remote URL in TUI session detail panel
• Add clickable remote URL with clipboard copy in Svelte GUI detail panel
• Include unit tests for bridge_status parsing

Test plan

• Verify remote URL appears in TUI session detail for Claude sessions with bridge_status
• Verify remote URL appears in GUI session detail with click-to-copy
• Verify REST API /api/sessions/:id includes remote_url field
• Run go test ./... to confirm all tests pass