Summary

• Add in-app feedback form accessible via Help > Report an Issue
• Supports Bug Report, Feature Request, and General Feedback types
• Multiple screenshot attachments (paste, drag-drop, capture window, browse files) up to 5
• Auto-collected diagnostics (app version, macOS, architecture, database type, plugins)
• Draft persistence via UserDefaults, restored on reopen
• Standalone NSPanel window, works without any database connection
• Submits to POST /v1/feedback which creates GitHub issues with labels and uploaded screenshots

New files

• FeedbackAPIClient.swift - HTTP client with models and error types
• FeedbackDiagnosticsCollector.swift - Auto-collects system info
• FeedbackDraft.swift - Codable draft model
• FeedbackViewModel.swift - Business logic, attachments, draft persistence
• FeedbackWindowController.swift - Singleton NSPanel controller
• FeedbackView.swift - SwiftUI form with .formStyle(.grouped)

Test plan

• Open Help > Report an Issue, verify panel opens
• Switch feedback types, verify steps/expected fields toggle for Bug Report
• Paste screenshot from clipboard
• Drag-drop image file onto form
• Click Capture Window, verify it captures the main window
• Click Browse, select multiple images
• Verify max 5 attachments enforced
• Toggle diagnostics, expand details, verify system info
• Fill form, close panel, reopen, verify draft restored
• Submit feedback, verify success view with GitHub issue link
• Verify dark mode colors adapt