修复画布快速编辑还原生成器

直接点击生成图时还原原生成器对话框

非生成图直接点击只选中不打开生成器

快速编辑按钮和右键入口按素材元数据打开对应生成器

补齐资源元数据回填和入口边界测试

(cherry picked from commit 45e4b6e64a)

src/components/image-editor/ImageCanvasGenerationDialogModel.test.ts

@@ -20,6 +20,7 @@ import {
   createEditDialogDraft,
   createGenerateDialogDraft,
   createIconGenerationDialogDraft,
+  createLayerGenerationDialogDraft,
   createPublicationGenerationDialogDraft,
   createQuickEditPanelDraft,
   createRedrawPanelDraft,
@@ -593,6 +594,61 @@ describe('ImageCanvasGenerationDialogModel', () => {
     });
   });
 
+  it('restores a plain generated layer from its own metadata', () => {
+    const canvasSize = { width: 960, height: 720 };
+    const viewport = { x: 0, y: 0, scale: 1 };
+
+    expect(
+      createLayerGenerationDialogDraft({
+        sourceLayer: createLayer({
+          sourceType: 'generated',
+          prompt: '图层提示词',
+          model: 'gpt-image-2',
+          generationInputs: {
+            fields: [{ title: '生成提示词', value: '元数据提示词' }],
+            references: [],
+          },
+        }),
+        canvasSize,
+        viewport,
+      }),
+    ).toMatchObject({
+      mode: 'generate',
+      prompt: '元数据提示词',
+      generatedLayerId: 'layer-source',
+      imageModel: 'gpt-image-2',
+      placeholder: {
+        x: 120,
+        y: 140,
+        width: 320,
+        height: 240,
+        originalWidth: 1024,
+        originalHeight: 768,
+      },
+    });
+  });
+
+  it('restores a tagged uploaded layer from its current asset kind', () => {
+    expect(
+      createLayerGenerationDialogDraft({
+        sourceLayer: createLayer({
+          sourceType: 'uploaded',
+          assetKind: 'character',
+          generationInputs: {
+            fields: [{ title: '角色设定', value: '黑衣剑士' }],
+            references: [],
+          },
+        }),
+        canvasSize: { width: 960, height: 720 },
+        viewport: { x: 0, y: 0, scale: 1 },
+      }),
+    ).toMatchObject({
+      mode: 'character',
+      prompt: '黑衣剑士',
+      generatedLayerId: 'layer-source',
+    });
+  });
+
   it('normalizes legacy nanobanana model aliases in quick edit drafts', () => {
     expect(
       createQuickEditPanelDraft(