Add update functionality for cloud-init templates in the dashboard

Implement a new API endpoint to update existing cloud-init templates, allowing users to modify template attributes such as name, user_data, meta_data, and network_config. Enhance the dashboard UI to include an update button for templates, along with associated JavaScript for handling update requests. This improves user experience by enabling direct template modifications from the interface.

emmc-provisioning/dashboard/app.py

@@ -1663,6 +1663,32 @@ def api_cloudinit_templates_get(tid):
     return jsonify({"error": "not found"}), 404
 
 
+@app.route("/api/cloudinit-templates/<tid>", methods=["PUT"])
+@require_admin
+def api_cloudinit_templates_update(tid):
+    """Update an existing template (name, user_data, meta_data, network_config). Id unchanged."""
+    body = request.get_json(force=True, silent=True) or {}
+    data = _load_cloudinit_templates()
+    templates = data.get("templates", [])
+    for i, t in enumerate(templates):
+        if t.get("id") == tid:
+            name = (body.get("name") or t.get("name") or "").strip()
+            if not name:
+                return jsonify({"ok": False, "error": "name required"}), 400
+            templates[i] = {
+                "id": tid,
+                "name": name,
+                "user_data": body.get("user_data", t.get("user_data", "")),
+                "meta_data": body.get("meta_data", t.get("meta_data", "")),
+                "network_config": body.get("network_config", t.get("network_config", "")),
+            }
+            data["templates"] = templates
+            if not _save_cloudinit_templates(data):
+                return jsonify({"ok": False, "error": "Failed to save"}), 500
+            return jsonify({"ok": True, "id": tid, "name": name})
+    return jsonify({"ok": False, "error": "not found"}), 404
+
+
 @app.route("/api/cloudinit-templates/<tid>", methods=["DELETE"])
 @require_admin
 def api_cloudinit_templates_delete(tid):