fix: pre-release review — frames dir, wigle config GET, debug redis-keys endpoint

CRITICAL:
- frames.py: FRAMES_DIR corrected to /tmp/adacam/pics
- frames.py: graceful handling when capture not started

IMPORTANT:
- wigle.py: added GET /api/1/wigle/config endpoint for the companion app
- app.py: added GET /api/1/debug/redis-keys endpoint for GPS troubleshooting
- install.sh: removed python validation that runs from wrong directory

adacam_api/routes/wigle.py

@@ -91,9 +91,28 @@ def wigle_stats():
         return jsonify({'error': str(e), 'total_networks': 0, 'uploaded_networks': 0, 'pending_upload': 0, 'scans_today': 0})
 
 
+@bp.route('/config', methods=['GET'])
+def get_wigle_config():
+    """Get WiGLE configuration (unauthenticated, tokens masked)."""
+    try:
+        conn = _get_db()
+        cfg = _get_config(conn)
+        conn.close()
+        
+        return jsonify({
+            'enabled': cfg.get('enabled', '0') == '1',
+            'api_name': cfg.get('api_name', ''),
+            'api_token_set': bool(cfg.get('api_token')),
+            'scan_interval_seconds': int(cfg.get('scan_interval_seconds', '30')),
+            'upload_interval_seconds': int(cfg.get('upload_interval_seconds', '300')),
+        })
+    except Exception as e:
+        return jsonify({'error': str(e)}), 500
+
+
 @bp.route('/config', methods=['POST'])
 @require_auth
-def wigle_config():
+def set_wigle_config():
     """Set WiGLE configuration (authenticated)."""
     data = request.get_json() or {}