[Linux] Home dashboard, command palette, settings, and secondary views

[2witstudios]

Overview

Implement remaining views to reach full feature parity with the macOS app.

Home Dashboard

Match PPG CLI/PPG CLI/HomeDashboardView.swift:

• Per-project cards showing: name, branch tag, worktree count
• Agent status dots (colored circles, up to 5 per status with +N overflow)
• 91-day commit heatmap (13×7 grid, 5 color levels, cairo drawing on gtk::DrawingArea)
• 10 most recent commits (hash, message, author, relative time)
• Data fetched via git log subprocess on background thread

Command Palette

Match PPG CLI/PPG CLI/CommandPalettePanel.swift:

• Overlay dialog (centered, dismissible with Escape)
• Phase 1: Searchable list of agent variants (Claude/Codex/OpenCode/Terminal/Worktree)
• Phase 2: Prompt text entry (multi-line gtk::TextView)
• Enter submits, Escape goes back/dismisses
• Triggered by Ctrl+N or sidebar "+" button
• Use adw::Dialog or custom floating gtk::Window

Settings

Match PPG CLI/PPG CLI/SettingsViewController.swift:

• Use adw::PreferencesWindow with groups:
  • Connection: Server URL, token (masked input), test connection button
  • Terminal: Font family (monospace filter), font size (8-24), shell path, history limit
  • Appearance: System/Light/Dark toggle
  • Shortcuts: Rebindable keyboard shortcuts table (Ctrl+D, Ctrl+Shift+D, Ctrl+W, etc.)
• Persist to ~/.config/ppg-desktop/settings.json

Prompts View

Match PPG CLI/PPG CLI/PromptsView.swift:

• Split pane: file list (left) + editor (right)
• Lists .ppg/prompts/*.md and .ppg/templates/*.md
• Segmented filter: All / Prompts / Templates
• Editor: monospace gtk::TextView with markdown highlighting
• {{VAR}} placeholders highlighted in orange
• Create / rename / delete prompts
• Also scan global ~/.ppg/prompts/ and ~/.ppg/templates/

Swarms View

Match PPG CLI/PPG CLI/SwarmsView.swift:

• Split pane: swarm list + form editor
• Lists .ppg/swarms/*.yaml files
• Form fields: name, description, strategy (shared/isolated), per-agent prompt + type
• YAML parsing (use serde_yaml crate)
• Create / edit / delete
• Also scan ~/.ppg/swarms/

Schedules View

Match PPG CLI/PPG CLI/SchedulesView.swift:

• Calendar view with Day/Week/Month modes
• Parse cron expressions from schedules.yaml files
• Show scheduled runs as colored blocks
• Implement cron parser in Rust (5-field: min/hour/DOM/month/DOW, supports *, /N, ranges, lists, name aliases)

Agent Config View

Match PPG CLI/PPG CLI/AgentConfigView.swift:

• 3 tabs: CLAUDE.md editor, Skills viewer, config.yaml editor
• CLAUDE.md: file picker per project, full text editor, save button
• Skills: list ~/.claude/skills/*/SKILL.md, show YAML frontmatter as form
• config.yaml: YAML editor with syntax highlighting

Acceptance Criteria

• Home dashboard shows project cards with stats, heatmap, commits
• Command palette spawns agents via REST API
• Settings persist and apply live (font, theme, shortcuts)
• Prompts view with create/edit/delete and markdown highlighting
• Swarms view with YAML form editor
• Schedules view with calendar and cron parsing
• Agent config view with CLAUDE.md + Skills + config editors