fix: install.sh 合并 skill.json（不覆盖内置 skills）

- skill.json 不再直接 cp 覆盖（会丢失 CoPaw 内置 skills）
- 改用 Python 合并注入：保留内置 + 追加自定义
- 补全 6 个自定义 skills 注册（5 TOC + voc_research）

agent/skill.json

@@ -1,28 +1,90 @@
 {
   "schema_version": "workspace-skill-manifest.v1",
-  "version": 1775495795224,
+  "version": 1775500000000,
   "skills": {
-    "voc_research": {
+    "ude_diagnosis": {
       "enabled": true,
-      "channels": [
-        "all"
-      ],
+      "channels": ["all"],
       "source": "customized",
       "metadata": {
-        "name": "voc_research",
-        "description": "VOC 研究采集与分析",
+        "name": "ude_diagnosis",
+        "description": "UDE 诊断 — TOC 不满意效果分析",
         "version_text": "1.0.0",
         "source": "customized",
         "protected": false,
-        "requirements": {
-          "require_bins": [],
-          "require_envs": []
-        }
+        "requirements": {"require_bins": [], "require_envs": []}
       },
-      "requirements": {
-        "require_bins": [],
-        "require_envs": []
-      }
+      "requirements": {"require_bins": [], "require_envs": []}
+    },
+    "conflict_cloud": {
+      "enabled": true,
+      "channels": ["all"],
+      "source": "customized",
+      "metadata": {
+        "name": "conflict_cloud",
+        "description": "冲突图构建 — TOC 对立假设分析",
+        "version_text": "1.0.0",
+        "source": "customized",
+        "protected": false,
+        "requirements": {"require_bins": [], "require_envs": []}
+      },
+      "requirements": {"require_bins": [], "require_envs": []}
+    },
+    "convention_breaker": {
+      "enabled": true,
+      "channels": ["all"],
+      "source": "customized",
+      "metadata": {
+        "name": "convention_breaker",
+        "description": "惯例揭示与打破 — TOC 核心突破",
+        "version_text": "1.0.0",
+        "source": "customized",
+        "protected": false,
+        "requirements": {"require_bins": [], "require_envs": []}
+      },
+      "requirements": {"require_bins": [], "require_envs": []}
+    },
+    "negative_branch": {
+      "enabled": true,
+      "channels": ["all"],
+      "source": "customized",
+      "metadata": {
+        "name": "negative_branch",
+        "description": "负面分支预测 — TOC 风险分析",
+        "version_text": "1.0.0",
+        "source": "customized",
+        "protected": false,
+        "requirements": {"require_bins": [], "require_envs": []}
+      },
+      "requirements": {"require_bins": [], "require_envs": []}
+    },
+    "proposal_assembler": {
+      "enabled": true,
+      "channels": ["all"],
+      "source": "customized",
+      "metadata": {
+        "name": "proposal_assembler",
+        "description": "提案组装 — 黑手党提案最终交付",
+        "version_text": "1.0.0",
+        "source": "customized",
+        "protected": false,
+        "requirements": {"require_bins": [], "require_envs": []}
+      },
+      "requirements": {"require_bins": [], "require_envs": []}
+    },
+    "voc_research": {
+      "enabled": true,
+      "channels": ["all"],
+      "source": "customized",
+      "metadata": {
+        "name": "voc_research",
+        "description": "VOC 研究采集与分析（需要用户自带 TikHub Key）",
+        "version_text": "1.0.0",
+        "source": "customized",
+        "protected": false,
+        "requirements": {"require_bins": [], "require_envs": []}
+      },
+      "requirements": {"require_bins": [], "require_envs": []}
     }
   }
 }