fix(clean): correct project-tech field references and add sync vs clean disambiguation

- Fix Step 4.3: project.features → project.development_index,
  project.statistics → project._metadata
- Add project-guidelines.json learnings cleanup on session deletion
- Add sync vs clean disambiguation table explaining write vs reclaim

ccw/frontend/src/locales/en/history.json

@@ -1,6 +1,10 @@
 {
   "title": "CLI Execution History",
   "description": "View and manage your CLI execution history",
+  "tabs": {
+    "executions": "Executions",
+    "observability": "Session Audit"
+  },
   "searchPlaceholder": "Search executions...",
   "filterAllTools": "All Tools",
   "deleteOptions": "Delete Options",
@@ -9,10 +13,14 @@
   "deleteAll": "Delete All History",
   "actions": {
     "view": "View Details",
+    "viewNative": "View Native Session",
     "delete": "Delete",
     "copyId": "Copy ID",
     "copied": "Copied!"
   },
+  "badge": {
+    "native": "native"
+  },
   "dialog": {
     "deleteTitle": "Confirm Delete",
     "deleteAllTitle": "Delete All History",

ccw/frontend/src/locales/en/index.ts

@@ -41,6 +41,7 @@ import cliViewer from './cli-viewer.json';
 import team from './team.json';
 import terminalDashboard from './terminal-dashboard.json';
 import skillHub from './skill-hub.json';
+import nativeSession from './native-session.json';
 
 /**
  * Flattens nested JSON object to dot-separated keys
@@ -105,4 +106,5 @@ export default {
   ...flattenMessages(team, 'team'),
   ...flattenMessages(terminalDashboard, 'terminalDashboard'),
   ...flattenMessages(skillHub, 'skillHub'),
+  ...flattenMessages(nativeSession, 'nativeSession'),
 } as Record<string, string>;

ccw/frontend/src/locales/en/native-session.json

@@ -0,0 +1,33 @@
+{
+  "title": "Native Session",
+  "tokens": {
+    "total": "Total tokens",
+    "input": "Input tokens",
+    "output": "Output tokens",
+    "cached": "Cached tokens"
+  },
+  "turn": {
+    "latest": "Latest",
+    "thoughts": "Thoughts",
+    "toolCalls": "Tool Calls"
+  },
+  "toolCall": {
+    "input": "Input",
+    "output": "Output"
+  },
+  "meta": {
+    "startTime": "Start time",
+    "workingDir": "Working directory",
+    "projectHash": "Project hash",
+    "turns": "turns"
+  },
+  "tokenSummary": "Total Tokens",
+  "loading": "Loading session...",
+  "error": "Failed to load session",
+  "empty": "No session data available",
+  "footer": {
+    "copied": "Copied!",
+    "copySessionId": "Copy Session ID",
+    "exportJson": "Export JSON"
+  }
+}

ccw/frontend/src/locales/zh/history.json

@@ -1,6 +1,10 @@
 {
   "title": "CLI 执行历史",
   "description": "查看和管理 CLI 执行历史",
+  "tabs": {
+    "executions": "执行历史",
+    "observability": "会话审计"
+  },
   "searchPlaceholder": "搜索执行记录...",
   "filterAllTools": "全部工具",
   "deleteOptions": "删除选项",
@@ -9,10 +13,14 @@
   "deleteAll": "删除全部历史",
   "actions": {
     "view": "查看详情",
+    "viewNative": "查看原生会话",
     "delete": "删除",
     "copyId": "复制 ID",
     "copied": "已复制！"
   },
+  "badge": {
+    "native": "原生"
+  },
   "dialog": {
     "deleteTitle": "确认删除",
     "deleteAllTitle": "删除全部历史",

ccw/frontend/src/locales/zh/index.ts

@@ -41,6 +41,7 @@ import cliViewer from './cli-viewer.json';
 import team from './team.json';
 import terminalDashboard from './terminal-dashboard.json';
 import skillHub from './skill-hub.json';
+import nativeSession from './native-session.json';
 
 /**
  * Flattens nested JSON object to dot-separated keys
@@ -105,4 +106,5 @@ export default {
   ...flattenMessages(team, 'team'),
   ...flattenMessages(terminalDashboard, 'terminalDashboard'),
   ...flattenMessages(skillHub, 'skillHub'),
+  ...flattenMessages(nativeSession, 'nativeSession'),
 } as Record<string, string>;

ccw/frontend/src/locales/zh/native-session.json

@@ -0,0 +1,33 @@
+{
+  "title": "原生会话",
+  "tokens": {
+    "total": "总 Token 数",
+    "input": "输入 Token",
+    "output": "输出 Token",
+    "cached": "缓存 Token"
+  },
+  "turn": {
+    "latest": "最新",
+    "thoughts": "思考过程",
+    "toolCalls": "工具调用"
+  },
+  "toolCall": {
+    "input": "输入",
+    "output": "输出"
+  },
+  "meta": {
+    "startTime": "开始时间",
+    "workingDir": "工作目录",
+    "projectHash": "项目哈希",
+    "turns": "轮次"
+  },
+  "tokenSummary": "总 Token",
+  "loading": "加载会话中...",
+  "error": "加载会话失败",
+  "empty": "无会话数据",
+  "footer": {
+    "copied": "已复制！",
+    "copySessionId": "复制会话 ID",
+    "exportJson": "导出 JSON"
+  }
+}