Add dashcam USB file browser

Co-authored-by: Copilot <[email protected]>

app.py

@@ -38,6 +38,29 @@ def dash_import():
     summary = app_dash.import_dashcam()
     return jsonify(summary)
 
+@app.route('/api/dash/files')
+def dash_files():
+    summary = app_dash.list_dashcam_files()
+    return jsonify(summary)
+
+@app.route('/api/dash/files', methods=['DELETE'])
+def dash_delete_all():
+    summary = app_dash.delete_dashcam_files(delete_all=True)
+    status_code = 200 if summary["status"] in {"ok", "partial"} else 409
+    return jsonify(summary), status_code
+
+@app.route('/api/dash/file', methods=['DELETE'])
+def dash_delete_file():
+    body = request.get_json(silent=True) or {}
+    summary = app_dash.delete_dashcam_files(relative_path=body.get("path"))
+    status_codes = {
+        "ok": 200,
+        "partial": 409,
+        "invalid_path": 400,
+        "not_found": 404,
+    }
+    return jsonify(summary), status_codes.get(summary["status"], 409)
+
 @app.route('/api/upload/status')
 def upload_status():
     return jsonify(app_upload.get_status())