fix: preserve full chat embed mode navigation

frontend-web/src/components/workspace/general-qa-sidebar.tsx

@@ -83,6 +83,7 @@ import {
   sortThreadsPinnedFirst,
   titleOfThread,
 } from "@/core/threads/utils";
+import { buildFullChatNavigationPath } from "@/core/page-layout/chats-iframe-route";
 import { env } from "@/env";
 import { desensitize } from "@/lib/desensitize";
 import { isIMEComposing } from "@/lib/ime";
@@ -185,15 +186,24 @@ export function GeneralQaSidebar() {
   // 当前嵌入的智能体（URL 上的 ?agent=）：用于高亮对应卡片。
   const searchParams = useSearchParams();
   const activeAgentId = searchParams.get("agent");
+  const currentSearch = searchParams.toString();
+  const newChatHref = buildFullChatNavigationPath(NEW_CHAT_PATH, currentSearch);
+  const moreAgentsHref = buildFullChatNavigationPath(MORE_AGENTS_HREF, currentSearch);
+  const moreChatsHref = buildFullChatNavigationPath(MORE_CHATS_HREF, currentSearch);
 
   // 点击常用智能体 = 在通用问答右侧**原地嵌入**该智能体的对话页：停留在 /chats/new，
   // 仅给 URL 加 ?agent=<id>，由 NewChatContent 把右侧问答区换成 AgentChatPage。
   // 不跳转独立页面、左侧栏不变。每次点击都重开一个干净会话（NewChatContent 的 key）。
   const handleSelectAgent = useCallback(
     (agentId: string) => {
-      navigate(`/page/workspace/chats/new?agent=${encodeURIComponent(agentId)}`);
+      navigate(
+        buildFullChatNavigationPath(
+          `${NEW_CHAT_PATH}?agent=${encodeURIComponent(agentId)}`,
+          currentSearch,
+        ),
+      );
     },
-    [navigate],
+    [currentSearch, navigate],
   );
 
   // ── 最近的对话取数 + 搜索 ──
@@ -241,7 +251,7 @@ export function GeneralQaSidebar() {
   const handleNewChatClick = (event: React.MouseEvent<HTMLAnchorElement>) => {
     if (event.metaKey || event.ctrlKey || event.shiftKey || event.button === 1) return;
     event.preventDefault();
-    navigate(NEW_CHAT_PATH, { replace: true, state: { resetAt: Date.now() } });
+    navigate(newChatHref, { replace: true, state: { resetAt: Date.now() } });
   };
 
   const handleDelete = useCallback(
@@ -257,10 +267,17 @@ export function GeneralQaSidebar() {
             nextThreadPath = listPathOfThread(threads[threadIndex - 1]!);
           }
         }
-        void router.push(nextThreadPath);
+        void router.push(buildFullChatNavigationPath(nextThreadPath, currentSearch));
       }
     },
-    [agentIdFromPath, deleteThread, router, threadIdFromPath, threads],
+    [
+      agentIdFromPath,
+      currentSearch,
+      deleteThread,
+      router,
+      threadIdFromPath,
+      threads,
+    ],
   );
 
   const handleRenameClick = useCallback((threadId: string, currentTitle: string) => {
@@ -314,7 +331,7 @@ export function GeneralQaSidebar() {
             底色用「主色混入透明」=主色低透明度叠在当前侧栏底色上，浅/红/蓝/深蓝主题都自适应
             （不要混 white，否则深蓝主题下会变成浅色块）。 */}
         <Link
-          href={NEW_CHAT_PATH}
+          href={newChatHref}
           onClick={handleNewChatClick}
           style={{ borderColor: "var(--primary)", color: "var(--primary)" }}
           className={cn(
@@ -415,7 +432,7 @@ export function GeneralQaSidebar() {
                   );
                 })}
                 <Link
-                  href={MORE_AGENTS_HREF}
+                  href={moreAgentsHref}
                   className="flex items-center justify-between rounded-lg px-3 py-1.5 text-[12px] text-muted-foreground/70 transition-colors hover:bg-accent/50 hover:text-foreground"
                 >
                   <span>{t.common.more}</span>
@@ -454,7 +471,10 @@ export function GeneralQaSidebar() {
                   </div>
                 ) : (
                   filteredThreads.map((thread) => {
-                    const href = listPathOfThread(thread);
+                    const href = buildFullChatNavigationPath(
+                      listPathOfThread(thread),
+                      currentSearch,
+                    );
                     const isActive = href === pathname;
                     const isBoot = isBootstrapThread(thread);
                     const pinned = isThreadPinned(thread);
@@ -576,7 +596,7 @@ export function GeneralQaSidebar() {
                 )}
                 {!query && (
                   <Link
-                    href={MORE_CHATS_HREF}
+                    href={moreChatsHref}
                     className="mt-0.5 flex items-center justify-between rounded-lg px-3 py-1.5 text-[12px] text-muted-foreground/70 transition-colors hover:bg-accent/50 hover:text-foreground"
                   >
                     <span>更多最近对话</span>

frontend-web/src/core/page-layout/chats-iframe-route.test.mjs

@@ -3,6 +3,7 @@ import test from "node:test";
 
 import {
   buildStandardChatRedirectPath,
+  buildFullChatNavigationPath,
   buildEmbeddedIframeRedirectPath,
   buildChatsIframeRedirectPath,
   buildChatsIframeThreadPath,
@@ -280,6 +281,27 @@ test("builds a standard full-chat URL without leaking the legacy marker", () =>
   );
 });
 
+test("keeps full-chat presentation flags when the sidebar opens an agent or thread", () => {
+  assert.equal(
+    buildFullChatNavigationPath(
+      "/page/workspace/chats/new?agent=agent-1",
+      "?hideChrome=1&chatMode=full",
+    ),
+    "/page/workspace/chats/new?agent=agent-1&hideChrome=1&chatMode=full",
+  );
+  assert.equal(
+    buildFullChatNavigationPath(
+      "/page/workspace/chats/thread-123",
+      "?embed=1&theme=dark-blue&chatMode=full",
+    ),
+    "/page/workspace/chats/thread-123?embed=1&theme=dark-blue&chatMode=full",
+  );
+  assert.equal(
+    buildFullChatNavigationPath("/page/workspace/chats/new", ""),
+    "/page/workspace/chats/new",
+  );
+});
+
 test("preserves explicit Brainy iframe mode and theme across redirects", () => {
   assert.equal(
     buildChatsIframeRedirectPath("?chatMode=iframe&theme=dark-blue&ticket=secret"),

frontend-web/src/core/page-layout/chats-iframe-route.ts

@@ -107,6 +107,26 @@ export function buildStandardChatRedirectPath(
   return query ? `${pathname}?${query}` : pathname;
 }
 
+/**
+ * Keep an explicitly selected standard-chat presentation while navigating
+ * between `/chats/new` and a concrete chat thread.  Without this, a click in
+ * the full-chat sidebar drops `hideChrome=1&chatMode=full`; an iframe host
+ * then looks like the legacy bare integration and is incorrectly redirected
+ * to the private AgentSelector workspace.
+ *
+ * This deliberately whitelists presentation flags through
+ * `buildStandardChatRedirectPath` instead of copying arbitrary login/query
+ * values into user-facing chat URLs.
+ */
+export function buildFullChatNavigationPath(
+  destinationPath: string,
+  search: string,
+): string {
+  return hasIframePresentationOverride(search) || isExplicitFullChatMode(search)
+    ? buildStandardChatRedirectPath(search, destinationPath)
+    : destinationPath;
+}
+
 /**
  * Preserve only the presentation parameters consumed by the iframe workspace.
  * Login credentials must never be copied into the post-login address bar.