feat(frontend): 记忆从设置弹窗移至侧边栏独立入口

- 新增 MemoryPage 及路由 /page/workspace/memory
- 侧边栏在「技能」下方新增「记忆」入口
- 设置弹窗注释掉「记忆」标签页

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend-web/src/pages/MemoryPage.tsx

@@ -0,0 +1,9 @@
+import { MemorySettingsPage } from "@/components/workspace/settings/memory-settings-page";
+
+export default function MemoryPage() {
+  return (
+    <div className="flex flex-col h-full overflow-auto p-6">
+      <MemorySettingsPage />
+    </div>
+  );
+}

frontend-web/src/pages/WorkspaceRoutes.tsx

@@ -21,6 +21,7 @@ import NewAgentPage from "./NewAgentPage";
 import ScheduledTaskRunDetailPage from "./ScheduledTaskRunDetailPage";
 import ScheduledTasksPage from "./ScheduledTasksPage";
 import LlmMetricsPage from "./LlmMetricsPage";
+import MemoryPage from "./MemoryPage";
 import PromptPrefixSettingsPage from "./PromptPrefixSettingsPage";
 import SkillEvolutionPage from "./SkillEvolutionPage";
 import SkillsPage from "./SkillsPage";
@@ -155,6 +156,14 @@ export default function WorkspaceRoutes({
           </WorkspaceLayout>
         }
       />
+      <Route
+        path="memory"
+        element={
+          <WorkspaceLayout {...layoutProps}>
+            <MemoryPage />
+          </WorkspaceLayout>
+        }
+      />
       <Route
         path="scheduled"
         element={<Navigate to="/page/workspace/scheduled/tasks" replace />}