feat: sentry integration (#51)

* feat: integrate sentry error reporting

* feat: report logger errors to sentry with 30s log context

src/instrument.ts

@@ -0,0 +1,60 @@
+import { app } from 'electron';
+import * as Sentry from '@sentry/electron/main';
+import path from 'path';
+import fs from 'fs';
+import { getAppDataDir } from './utils/paths';
+import { logger } from './utils/logger';
+
+function getQuickConfig() {
+  try {
+    const configPath = path.join(getAppDataDir(), 'gui_config.json');
+    if (fs.existsSync(configPath)) {
+      const content = fs.readFileSync(configPath, 'utf-8');
+      const config = JSON.parse(content);
+      // Default to false (privacy by default)
+      return config.error_reporting_enabled;
+    }
+  } catch (e) {
+    console.error('Failed to read config for Sentry init:', e);
+  }
+  return false;
+}
+
+if (getQuickConfig()) {
+  Sentry.init({
+    dsn: process.env.SENTRY_DSN,
+    release: `antigravity-manager@${app.getVersion()}`,
+    beforeSend(event) {
+      if (event.exception?.values?.[0]?.value) {
+        event.exception.values[0].value = event.exception.values[0].value.replace(
+          /Users\\\\[^\\\\]+/g,
+          'Users\\\\***',
+        );
+      }
+      return event;
+    },
+  });
+  logger.setErrorReportingEnabled(true);
+  logger.setSentryReporter((payload) => {
+    Sentry.withScope((scope) => {
+      scope.setTag('log_level', payload.level);
+      scope.setContext('recent_logs', {
+        entries: payload.logs.map((entry) => ({
+          timestamp: new Date(entry.timestamp).toISOString(),
+          level: entry.level,
+          message: entry.message,
+          formatted: entry.formatted,
+        })),
+      });
+      scope.setExtra('log_message', payload.message);
+      if (payload.error) {
+        Sentry.captureException(payload.error);
+        return;
+      }
+      Sentry.captureMessage(payload.message, 'error');
+    });
+  });
+} else {
+  logger.setErrorReportingEnabled(false);
+  logger.setSentryReporter(null);
+}