diff --git a/src/content/components/config-panel.ts b/src/content/components/config-panel.ts
index d926a04..e2b189d 100644
--- a/src/content/components/config-panel.ts
+++ b/src/content/components/config-panel.ts
@@ -28,6 +28,12 @@ export class ConfigPanel extends LitElement {
   @property({ type: Number })
   selectedCount = 0;
 
+  /**
+   * Number of files that will actually be renamed (preview items)
+   */
+  @property({ type: Number })
+  renameCount = 0;
+
   /**
    * Number of conflicts detected
    */
@@ -171,7 +177,7 @@ export class ConfigPanel extends LitElement {
    * @private
    */
   private handleExecute(): void {
-    if (this.selectedCount === 0 || this.disabled || this.executing) {
+    if (this.renameCount === 0 || this.disabled || this.executing) {
       return;
     }
 
@@ -184,7 +190,7 @@ export class ConfigPanel extends LitElement {
   }
 
   render() {
-    const canExecute = this.selectedCount > 0 && !this.disabled && !this.executing;
+    const canExecute = this.renameCount > 0 && !this.disabled && !this.executing;
     const hasConflicts = this.conflictCount > 0;
     const showExecutionView = this.executing || this.finished;
 
@@ -216,7 +222,7 @@ export class ConfigPanel extends LitElement {
                   @click=${this.handleExecute}
                 >
                   ${this.executing ? I18nService.t('executing') : I18nService.t('execute_rename')}
-                  ${this.selectedCount > 0 ? ` (${this.selectedCount})` : ''}
+                  ${this.selectedCount > 0 ? ` (${this.renameCount})` : ''}
                 </button>
               `}
         </div>
diff --git a/src/content/components/file-selector-panel.ts b/src/content/components/file-selector-panel.ts
index 7c9cdfa..04547c2 100644
--- a/src/content/components/file-selector-panel.ts
+++ b/src/content/components/file-selector-panel.ts
@@ -792,6 +792,7 @@ export class FileSelectorPanel extends LitElement {
             <config-panel
               class="left-panel"
               .selectedCount=${this.selectedFiles.length}
+              .renameCount=${this.previewList.length}
               .conflictCount=${this.conflictIds.size}
               ?disabled=${this.loading}
               ?executing=${this.executing}
@@ -884,7 +885,7 @@ export class FileSelectorPanel extends LitElement {
       display: flex;
       align-items: center;
       justify-content: center;
-      z-index: 10000;
+      z-index: 2147483647;
       animation: fadeIn 0.2s ease;
     }
 
diff --git a/src/content/components/floating-button.ts b/src/content/components/floating-button.ts
index c0428d2..fe04110 100644
--- a/src/content/components/floating-button.ts
+++ b/src/content/components/floating-button.ts
@@ -87,7 +87,7 @@ export class FloatingButton {
         logger.warn('Shadow DOM not supported, using fallback mount strategy');
         // 降级方案：直接挂载容器
         this.container = this.createContainer();
-        this.container.style.zIndex = '2147483647';
+        this.container.style.zIndex = '2147483646';
         parent.appendChild(this.container);
         await this.loadPosition();
         this.applyPosition();
@@ -104,7 +104,7 @@ export class FloatingButton {
         left: 0;
         width: 100%;
         height: 100%;
-        z-index: 2147483647;
+        z-index: 2147483646;
         pointer-events: none;
       `;
 
diff --git a/src/shared/version.ts b/src/shared/version.ts
index 70d73dd..397a47d 100644
--- a/src/shared/version.ts
+++ b/src/shared/version.ts
@@ -10,7 +10,7 @@
  * 1. Edit version in package.json
  * 2. Run: npm run sync:version (or automatically via prebuild/predev)
  *
- * Generated at: 2025-12-29T07:41:42.086Z
+ * Generated at: 2025-12-29T09:07:09.736Z
  */
 
 /**