feat(y-log/knowledge): 日志前缀改 CM助手-全量 + 入库 nodeName 按标题去时间戳保持一致

1. Y-Log 上报 optDetail 前缀 B1-CM助手 → CM助手-全量（全量替换 44 个前端文件 + 文档）
2. 知识库入库 nodeName 改为只取 md5(标题).md（去掉时间戳），同一篇 md 每次入库一致，避免重复记录

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/pages/AgentChatPage.tsx

@@ -165,7 +165,7 @@ export default function AgentChatPage({
         const lastHuman = [...msgs].reverse().find((m) => (m as { type?: string }).type === "human");
         writeYLog({
           optType: OptType.other,
-          optDetail: "B1-CM助手-专家代理问答",
+          optDetail: "CM助手-全量-专家代理问答",
           url: `/api/threads/${threadId ?? ""}/runs/stream`,
           reqParam: { agent_id, question: lastHuman ? textOfMessage(lastHuman) : "" },
           returnParam: { data: lastAi ? textOfMessage(lastAi) : "" },

frontend-web/src/pages/ChatPage.tsx

@@ -195,7 +195,7 @@ export default function ChatPage() {
         const lastHuman = [...msgs].reverse().find((m) => (m as { type?: string }).type === "human");
         writeYLog({
           optType: OptType.other,
-          optDetail: "B1-CM助手-专家代理问答",
+          optDetail: "CM助手-全量-专家代理问答",
           url: `/api/threads/${threadId ?? ""}/runs/stream`,
           reqParam: { agent_id: selectedAgentId, question: lastHuman ? textOfMessage(lastHuman) : "" },
           returnParam: { data: lastAi ? textOfMessage(lastAi) : "" },

frontend-web/src/pages/LoginPage.tsx

@@ -170,7 +170,7 @@ export default function LoginPage() {
           void fetchYLogConfig();
           writeYLog({
             optType: OptType.login,
-            optDetail: 'B1-CM助手-登录',
+            optDetail: 'CM助手-全量-登录',
             url: '/api/v1/auth/login/token',
             reqParam: { username: loginUserName || auth.user_id },
             returnParam: { user_id: auth.user_id },