feat: inject 3q context into rwfx chat

frontend-web/src/core/threads/hooks.ts

@@ -343,15 +343,24 @@ function lastHumanFromChatModelInput(input: unknown): string {
       if (Array.isArray(m)) m.forEach(push);
       else if (m != null) flat.push(m);
     };
-    push(raw);
-    for (let i = flat.length - 1; i >= 0; i--) {
-      const m = flat[i];
-      if (!m || typeof m !== "object") continue;
-      const type = (m as Record<string, unknown>).type ?? (m as Record<string, unknown>).role;
-      if (type === "human" || type === "user") {
-        const text = textFromChatModelOutput(m);
-        if (text) return text;
-      }
+    push(raw);
+    for (let i = flat.length - 1; i >= 0; i--) {
+      const m = flat[i];
+      if (!m || typeof m !== "object") continue;
+      const obj = m as Record<string, unknown>;
+      const type = obj.type ?? obj.role;
+      if (type === "human" || type === "user") {
+        const kwargs = obj.additional_kwargs;
+        if (
+          kwargs &&
+          typeof kwargs === "object" &&
+          (kwargs as Record<string, unknown>).hide_from_ui === true
+        ) {
+          continue;
+        }
+        const text = textFromChatModelOutput(m);
+        if (text) return text;
+      }
     }
   } catch {
     /* 取不到忽略 */