Add API endpoint to clear status and update UI with hints for golden image handling in eMMC provisioning dashboard

chromium-setup/emmc-provisioning/dashboard/app.py

@@ -151,6 +151,22 @@ def api_status():
     return jsonify(read_status())
 
 
+@app.route("/api/status-clear", methods=["POST"])
+def api_status_clear():
+    """Reset status to idle (e.g. to dismiss a 'Golden image not found' error so you can try again)."""
+    try:
+        with open(STATUS_FILE, "w") as f:
+            json.dump({
+                "phase": "idle",
+                "message": DEFAULT_STATUS["message"],
+                "progress": None,
+                "updated": None,
+            }, f)
+        return jsonify({"ok": True})
+    except (PermissionError, OSError):
+        return jsonify({"ok": False, "error": "Could not write status"}), 500
+
+
 @app.route("/api/log")
 def api_log():
     return jsonify({"log": read_log_tail()})