feat: add Claude usage tracking via CLI

Adds a Claude usage tracking feature that displays session, weekly, and Sonnet usage stats. Uses the Claude CLI's /usage command to fetch data (no API key required).

Features:
- Usage popover in board header showing session, weekly, and Sonnet limits
- Progress bars with color-coded status (green/orange/red)
- Auto-refresh with configurable interval
- Caching of usage data with stale indicator
- Settings section for refresh interval configuration

Server:
- ClaudeUsageService: Executes Claude CLI via PTY (expect) to fetch usage
- New /api/claude/usage endpoint

UI:
- ClaudeUsagePopover component with usage cards
- ClaudeUsageSection in settings for configuration
- Integration with app store for persistence

apps/server/src/index.ts

@@ -44,6 +44,7 @@ import { AutoModeService } from "./services/auto-mode-service.js";
 import { getTerminalService } from "./services/terminal-service.js";
 import { SettingsService } from "./services/settings-service.js";
 import { createSpecRegenerationRoutes } from "./routes/app-spec/index.js";
+import { createClaudeRoutes } from "./routes/claude/index.js";
 
 // Load environment variables
 dotenv.config();
@@ -141,6 +142,7 @@ app.use("/api/workspace", createWorkspaceRoutes());
 app.use("/api/templates", createTemplatesRoutes());
 app.use("/api/terminal", createTerminalRoutes());
 app.use("/api/settings", createSettingsRoutes(settingsService));
+app.use("/api/claude", createClaudeRoutes());
 
 // Create HTTP server
 const server = createServer(app);