Add chat/promptSteer support for steering running prompts

🤖 Generated with [eca](https://eca.dev)

Co-Authored-By: eca <git@eca.dev>

Author: ericdallo

eca-webview

@@ -132,6 +132,14 @@ export class EcaRemoteApi {
     });
   }
 
+  /** Steer a running prompt by injecting a message at the next turn boundary. */
+  async steerPrompt(chatId: string, message: string): Promise<void> {
+    return this.request(`/chats/${chatId}/steer`, {
+      method: 'POST',
+      body: { message },
+    });
+  }
+
   /** Approve a pending tool call. Ignores 409 (already handled). */
   async approveToolCall(chatId: string, toolCallId: string, save?: string): Promise<void> {
     return this.request(`/chats/${chatId}/approve/${toolCallId}`, {

src/bridge/api.ts

@@ -67,6 +67,10 @@ export async function handleOutbound(
         await api.stopPrompt(data.chatId);
         break;
 
+      case 'chat/promptSteer':
+        await api.steerPrompt(data.chatId, data.message);
+        break;
+
       case 'chat/delete':
         // No-op in web: closing a tab should not delete the chat from the
         // server cache.  The webview already removes it locally via resetChat.

src/bridge/outbound-handler.ts

@@ -239,6 +239,7 @@ export type OutboundMessage =
   | { type: 'chat/toolCallApprove'; data: { chatId: string; toolCallId: string; save?: string } }
   | { type: 'chat/toolCallReject'; data: { chatId: string; toolCallId: string } }
   | { type: 'chat/promptStop'; data: { chatId: string } }
+  | { type: 'chat/promptSteer'; data: { chatId: string; message: string } }
   | { type: 'chat/delete'; data: { chatId: string } }
   | { type: 'chat/rollback'; data: { chatId: string; contentId: string } }
   | { type: 'chat/clearChat'; data: { chatId: string } }