style: strip the multi-line composer down to a bare editor (#3)

src/lib/components/ComposeForm.tsx

@@ -1,14 +1,34 @@
-import { useNavigation } from "@vicinae/api";
+import { Action, ActionPanel, Form, Icon, useNavigation } from "@vicinae/api";
-import { Form, Action, ActionPanel, Icon } from "@vicinae/api";
 import { useState } from "react";
 
 /**
  * The multi-line composer.
  *
- * This exists because the launcher's search bar is single-line and there is no
+ * This view exists because the launcher's search bar is single-line and there
- * API to change that. Pressing ⌘↩ in the chat view pushes this view, where a
+ * is no API to change that. Pressing ⌘↩ in the chat view pushes this view, where
- * real multi-line text area gives the behaviour people expect from a chat box:
+ * a real multi-line text area gives the behaviour people expect from a chat box:
- * Return inserts a newline, and ⌘↩ sends.
+ * Return inserts a newline, ⌘↩ sends.
+ *
+ * It is deliberately stripped down to a single bare editor:
+ *
+ * - no field label, so nothing competes with the text itself
+ * - no description block, because the action bar already renders "Send ⌘↩"
+ *   next to the button, which documents the shortcut without a paragraph
+ * - the placeholder is one short line rather than an instructions sentence
+ *
+ * ## The width limit
+ *
+ * A `Form.TextArea` cannot be made truly full-width from the extension API.
+ * Vicinae always renders it inside its `FormField` component
+ * (`ExtensionFormView.qml` → `textareaFieldComp`), and `FormField.qml` always
+ * lays out as three columns with proportional widths 2 / 5 / 2 — a label
+ * gutter, the editor, and an empty right spacer. That leaves roughly five
+ * ninths of the width for the editor, and the spacer stays even when there is
+ * no label. None of it is reachable from the extension side.
+ *
+ * So the only lever here is removing clutter, not reclaiming width. If Vicinae
+ * ever exposes a label-less or full-width field variant, this is the file to
+ * simplify further.
  */
 export interface ComposeFormProps {
   initialValue: string;
@@ -21,7 +41,7 @@ export function ComposeForm({ initialValue, onSubmit }: ComposeFormProps) {
 
   return (
     <Form
-      navigationTitle="Compose message"
+      navigationTitle="Compose"
       actions={
         <ActionPanel>
           <Action.SubmitForm
@@ -46,13 +66,11 @@ export function ComposeForm({ initialValue, onSubmit }: ComposeFormProps) {
     >
       <Form.TextArea
         id="prompt"
-        title="Message"
+        placeholder="Ask Lam anything…"
-        placeholder="Ask Lam anything. Return starts a new line."
         defaultValue={initialValue}
         error={error}
         autoFocus
       />
-      <Form.Description title="Keyboard" text="Return — new line   ·   ⌘↩ — send" />
     </Form>
   );
 }