Revert "feat: AI entry button at the cell's bottom-right + clear input after success"

This reverts commit fd30e53e25.

src/components/opencode_cell_actions.ts

@@ -50,22 +50,11 @@ export class OpenCodeCellActions extends Widget {
   private _context: CellContext | null = null;
   private _status: Status = 'idle';
   private _prompt: OpenCodeInlinePrompt | null = null;
-  // Floating "AI" entry button that lives at the cell's bottom-right
-  // corner (overlaid on the cell, absolutely positioned). The widget's
-  // own node stays inside the native cell toolbar (as a hidden lifecycle
-  // holder) and is NOT where the user-visible button renders.
-  private _floatingBtn: HTMLButtonElement | null = null;
 
   constructor(cell: CodeCell) {
     super();
     this._cell = cell;
     this.addClass('opencode-cell-actions');
-    // Hide the widget's own node inside the native cell toolbar — the
-    // actual UI is the floating button below.
-    this.node.style.display = 'none';
-    // Anchor the absolutely-positioned floating button to the cell.
-    this._cell.node.style.position = 'relative';
-    this._createFloatingButton();
     this._cell.model.contentChanged.connect(this._onModelChange, this);
     this._cell.model.stateChanged.connect(this._onModelChange, this);
     this._render();
@@ -79,26 +68,9 @@ export class OpenCodeCellActions extends Widget {
     this._cell.model.contentChanged.disconnect(this._onModelChange, this);
     this._cell.model.stateChanged.disconnect(this._onModelChange, this);
     this._hidePrompt();
-    if (this._floatingBtn && this._floatingBtn.parentNode) {
-      this._floatingBtn.parentNode.removeChild(this._floatingBtn);
-    }
-    this._floatingBtn = null;
     super.dispose();
   }
 
-  private _createFloatingButton(): void {
-    const btn = document.createElement('button');
-    btn.className = 'opencode-cell-ai-btn';
-    btn.type = 'button';
-    btn.textContent = 'AI';
-    btn.title = '让 AI 修改这个 cell 的代码';
-    btn.addEventListener('click', () => {
-      this._togglePrompt();
-    });
-    this._cell.node.appendChild(btn);
-    this._floatingBtn = btn;
-  }
-
   private _onModelChange(): void {
     this._context = extractCellContextFromCell(this._cell);
     if (this._prompt) {
@@ -109,18 +81,22 @@ export class OpenCodeCellActions extends Widget {
   }
 
   private _render(): void {
-    // The widget's own node no longer hosts the button (it lives at the
-    // cell's bottom-right). Just update the floating button's label and
-    // disabled state.
-    const btn = this._floatingBtn;
-    if (!btn) {
-      return;
-    }
+    const node = this.node;
+    node.textContent = '';
+
     const baseDisabled = !this._context || this._status === 'loading';
+
+    const btn = document.createElement('button');
+    btn.className = 'opencode-btn opencode-btn-ai';
+    btn.textContent = 'AI';
     btn.disabled = baseDisabled;
     btn.title = baseDisabled
       ? 'OpenCode: 等待 cell 上下文…'
       : '让 AI 修改这个 cell 的代码';
+    btn.addEventListener('click', () => {
+      this._togglePrompt();
+    });
+    node.appendChild(btn);
   }
 
   private _togglePrompt(): void {
@@ -228,8 +204,6 @@ export class OpenCodeCellActions extends Widget {
       if (notebookPath) {
         void this._refreshHistory(notebookPath);
       }
-      // Clear the input so the user can type a follow-up message.
-      this._prompt?.clearInput();
       Notification.info(
         `OpenCode 完成 (${resp.markdown.length} chars). Session: ${resp.sessionId.slice(0, 8)}…`
       );