declare the whisper server as a setting

This plugin ships no web/, so there was nowhere to set its server URL — the only
way in was an HTTP call somebody had to already know about. That is not a
setting, it is a secret handshake, and it is the state this shipped in.

Declared rather than rendered: the platform draws the form on the plugin detail
page and PUTs to this plugin's own /config. It stores nothing, so the URL stays
where this plugin already kept it and the validation against the server still
happens here.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Officer-Session: 656f5c85-e49a-4f1f-b9f3-042a04b4d043

manifest.ts

@@ -25,7 +25,7 @@ import type { PluginManifest } from '@@/plugins/manifest';
  *
  * Nothing shells out. The sidecar reaches whisper.cpp with `fetch`, the same as the code it replaces did.
  *
- * ── No `web/` ──
+ * ── No `web/`, and no settings screen of its own ──
  *
  * This plugin ships no dashboard route and no dock tile — `plugin.web` gates the tile, and a
  * backend-only plugin has nothing to pin one to. It is reached from a task's right-click menu and by an
@@ -41,6 +41,25 @@ export const manifest: PluginManifest = {
   icon: 'AudioLines',
   color: '#f97316',
 
+  /**
+   * The whisper.cpp server this talks to. Declared rather than rendered: this plugin ships no `web/`, so
+   * without a declaration there is nowhere to set it and the only way in is an HTTP call somebody has to
+   * know about — which is the state it shipped in.
+   *
+   * The platform renders the form and PUTs to this plugin's own `/config`. It stores nothing: the URL
+   * lives where this plugin keeps it, and validation against the server still happens here.
+   */
+  settings: [
+    {
+      key: 'url',
+      label: 'Whisper server',
+      hint: 'The whisper.cpp server to transcribe through. Checked before it is saved.',
+      type: 'url',
+      required: true,
+      placeholder: 'http://127.0.0.1:8178',
+    },
+  ],
+
   permissions: [
     {
       key: 'transcribe',