Improving all side of app

web/src/lib/ws.ts

@@ -1,5 +1,6 @@
 import { writable, type Readable } from './store';
 import { writeLocalState } from './localstate';
+import { pushControlDialog } from './controldialogs';
 import type { SignalRef, SignalValue, SignalMeta, HistoryPoint } from './types';
 
 // ── Types ────────────────────────────────────────────────────────────────────
@@ -163,6 +164,16 @@ class WsClient {
         }
         break;
       }
+      case 'dialog': {
+        // Server-side control logic requesting a user notification / input.
+        pushControlDialog({
+          id: String(msg.id),
+          kind: msg.kind === 'error' || msg.kind === 'input' ? msg.kind : 'info',
+          title: msg.title,
+          message: msg.message,
+        });
+        break;
+      }
       case 'error':
         // Resolve any pending history callbacks with empty data on error
         if (key && this.histCallbacks.has(key)) {
@@ -270,6 +281,14 @@ class WsClient {
     console.log('[ws] write', ref.ds, ref.name, value, 'ws state:', this.ws?.readyState);
     this._send({ type: 'write', ds: ref.ds, name: ref.name, value });
   }
+
+  /**
+   * Answer a control-logic input dialog. `value === null` cancels (dismisses)
+   * the dialog without writing its target server variable.
+   */
+  sendDialogResponse(id: string, value: number | null): void {
+    this._send({ type: 'dialogResponse', id, value });
+  }
 }
 
 // Singleton instance