feat: Phase 1 — Design System & Database Layer

[dplakon]

Phase 1: Design System & Database Layer

What

Implements the full design token system, core UI component library, SQLite database with schema, Rust CRUD commands, and typed frontend API layer for the AgentOS desktop app.

Design System

• Tailwind config updated with correct design spec colors: #0A0A0B base, #141415 raised, #1C1C1E elevated, #6E56CF violet accent
• Typography: Inter for UI, JetBrains Mono for code (loaded from Google Fonts)
• Spacing: 4px base grid with all multiples
• Agent status colors: running (green), error (red), deploying (amber), paused (violet), idle (gray) — each with muted variants
• Animations: fade-in/out, slide-in/out, scale-in with proper easing
• globals.css: Dark theme scrollbar, violet selection, focus-visible ring, font smoothing

UI Components (Radix UI + Tailwind)

All components use class-variance-authority for variant management and the cn() utility for class merging:

• Button — primary, secondary, ghost, destructive, outline variants; sm/md/lg/icon sizes; supports asChild via Radix Slot
• Input — styled with focus ring, disabled states, placeholder color
• Badge — status-aware variants (running/error/deploying/paused/idle) with optional pulsing dot indicator
• Tooltip — Radix portal with fade animation
• Dialog — overlay with blur, close button, header/footer/title/description sub-components
• DropdownMenu — full Radix menu with items, checkbox items, radio items, labels, separators, keyboard shortcut display
• Tabs — underline active indicator with violet accent border

Database (SQLite via rusqlite)

• WAL mode enabled for better concurrent read performance
• Auto-migrations on startup
• 6 tables: agents, files, schedules, environments, api_keys, audit_log
• All tables use agent_id foreign keys (CASCADE on delete, SET NULL for audit_log)
• Indexes on all foreign keys and audit_log.created_at

Rust Backend Commands (21 total)

• Agents: list, get, create, update, delete
• Files: list, create, update, delete
• Schedules: list, create, update, delete
• Environments: list, create, update, delete
• API Keys: list, create, revoke, delete
• Audit Log: list (with optional agent_id filter and limit)
• All mutations automatically log to audit_log

Frontend API Layer (src/lib/api.ts)

• Fully typed TypeScript wrappers around all 21 Tauri commands
• Namespaced API objects: agentsApi, filesApi, schedulesApi, environmentsApi, apiKeysApi, auditLogApi
• Generic call<T>() helper with error handling
• All entity types, input types, and response types exported

Notes

• Pre-existing TypeScript errors in mockData.ts are from worker-1's branch (not introduced by this PR)
• The agent.rs and storage.rs modules are preserved for backward compatibility but the new commands.rs + db.rs are the primary backend

This PR was generated with Oz.