feat: add Ctrl+Enter and Enter keyboard navigation to form modal

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/ui/form-modal.ts

@@ -132,6 +132,29 @@ export class FormModal extends Modal {
     submitBtn.addEventListener('click', () => {
       this.handleSubmit();
     });
+
+    // Keyboard navigation
+    contentEl.addEventListener('keydown', (e: KeyboardEvent) => {
+      // Ctrl+Enter always submits
+      if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
+        e.preventDefault();
+        this.handleSubmit();
+        return;
+      }
+
+      // Enter on single-line inputs submits (unless in suggest dropdown)
+      if (e.key === 'Enter' && !e.shiftKey) {
+        const target = e.target as HTMLElement;
+        if (
+          target instanceof HTMLInputElement &&
+          target.type !== 'textarea' &&
+          !target.closest('.ff-suggest-wrapper')
+        ) {
+          e.preventDefault();
+          this.handleSubmit();
+        }
+      }
+    });
   }
 
   private async handleSubmit(): Promise<void> {