feat: add jimeng (即梦AI) CLI support (#57)

Add two CLI commands for Jimeng (即梦AI) — ByteDance's AI image generation platform:

- generate: Text-to-image generation with model selection and configurable wait time
- history: View recent generation history with prompt, model, status, and image URLs

Both commands use browser automation with cookie-based authentication on jimeng.jianying.com.

src/clis/jimeng/generate.yaml

@@ -0,0 +1,84 @@
+site: jimeng
+name: generate
+description: 即梦AI 文生图 — 输入 prompt 生成图片
+domain: jimeng.jianying.com
+strategy: cookie
+browser: true
+
+args:
+  prompt:
+    type: string
+    required: true
+    description: "图片描述 prompt"
+  model:
+    type: string
+    default: "high_aes_general_v50"
+    description: "模型: high_aes_general_v50 (5.0 Lite), high_aes_general_v42 (4.6), high_aes_general_v40 (4.0)"
+  wait:
+    type: int
+    default: 40
+    description: "等待生成完成的秒数"
+
+columns: [status, prompt, image_count, image_urls]
+
+pipeline:
+  - navigate: https://jimeng.jianying.com/ai-tool/generate?type=image&workspace=0
+  - wait: 3
+  - evaluate: |
+      (async () => {
+        const prompt = ${{ args.prompt | json }};
+        const waitSec = ${{ args.wait }};
+        
+        // Step 1: Count existing images before generation
+        const beforeImgs = document.querySelectorAll('img[src*="dreamina-sign"], img[src*="tb4s082cfz"]').length;
+        
+        // Step 2: Clear and set prompt
+        const editors = document.querySelectorAll('[contenteditable="true"]');
+        const editor = editors[0];
+        if (!editor) return [{ status: 'failed', prompt: prompt, image_count: 0, image_urls: 'Editor not found' }];
+        
+        editor.focus();
+        await new Promise(r => setTimeout(r, 200));
+        document.execCommand('selectAll');
+        await new Promise(r => setTimeout(r, 100));
+        document.execCommand('delete');
+        await new Promise(r => setTimeout(r, 200));
+        document.execCommand('insertText', false, prompt);
+        await new Promise(r => setTimeout(r, 500));
+        
+        // Step 3: Click generate
+        const btn = document.querySelector('.lv-btn.lv-btn-primary[class*="circle"]');
+        if (!btn) return [{ status: 'failed', prompt: prompt, image_count: 0, image_urls: 'Generate button not found' }];
+        btn.click();
+        
+        // Step 4: Wait for new images to appear
+        let newImgs = [];
+        for (let i = 0; i < waitSec; i++) {
+          await new Promise(r => setTimeout(r, 1000));
+          const allImgs = document.querySelectorAll('img[src*="dreamina-sign"], img[src*="tb4s082cfz"]');
+          if (allImgs.length > beforeImgs) {
+            // New images appeared — generation complete
+            newImgs = Array.from(allImgs).slice(0, allImgs.length - beforeImgs);
+            break;
+          }
+        }
+        
+        if (newImgs.length === 0) {
+          return [{ status: 'timeout', prompt: prompt, image_count: 0, image_urls: 'Generation may still be in progress' }];
+        }
+        
+        // Step 5: Extract image URLs (use thumbnail URLs which are accessible)
+        const urls = newImgs.map(img => img.src);
+        
+        return [{ 
+          status: 'success', 
+          prompt: prompt.substring(0, 80), 
+          image_count: urls.length, 
+          image_urls: urls.join('\n')
+        }];
+      })()
+  - map:
+      status: ${{ item.status }}
+      prompt: ${{ item.prompt }}
+      image_count: ${{ item.image_count }}
+      image_urls: ${{ item.image_urls }}

src/clis/jimeng/history.yaml

@@ -0,0 +1,47 @@
+site: jimeng
+name: history
+description: 即梦AI 查看最近生成的作品
+domain: jimeng.jianying.com
+strategy: cookie
+browser: true
+
+args:
+  limit:
+    type: int
+    default: 5
+
+columns: [prompt, model, status, image_url, created_at]
+
+pipeline:
+  - navigate: https://jimeng.jianying.com/ai-tool/generate?type=image&workspace=0
+  - wait: 3
+  - evaluate: |
+      (async () => {
+        const limit = ${{ args.limit }};
+        const res = await fetch('/mweb/v1/get_history?aid=513695&device_platform=web&region=cn&da_version=3.3.11&web_version=7.5.0&aigc_features=app_lip_sync', {
+          method: 'POST',
+          credentials: 'include',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ cursor: '', count: limit, need_page_item: true, need_aigc_data: true, aigc_mode_list: ['workbench'] })
+        });
+        const data = await res.json();
+        const items = data?.data?.history_list || [];
+        return items.slice(0, limit).map(item => {
+          const params = item.aigc_image_params?.text2image_params || {};
+          const images = item.image?.large_images || [];
+          return {
+            prompt: params.prompt || item.common_attr?.title || 'N/A',
+            model: params.model_config?.model_name || 'unknown',
+            status: item.common_attr?.status === 102 ? 'completed' : 'pending',
+            image_url: images[0]?.image_url || '',
+            created_at: new Date((item.common_attr?.create_time || 0) * 1000).toLocaleString('zh-CN'),
+          };
+        });
+      })()
+  - map:
+      prompt: ${{ item.prompt }}
+      model: ${{ item.model }}
+      status: ${{ item.status }}
+      image_url: ${{ item.image_url }}
+      created_at: ${{ item.created_at }}
+  - limit: ${{ args.limit }}