fix: separate btw fallback copy and keep synthetic snapshot overridable

web/src/app/(main)/chat/page.tsx

@@ -760,7 +760,13 @@ function ChatView({
   }
 
   return (
-    <SideQuestionWorkspace side={side} label={agent?.name ?? conv.agent_key} composerLayout="inline">
+    <SideQuestionWorkspace
+      side={side}
+      label={agent?.name ?? conv.agent_key}
+      composerLayout="inline"
+      noSnapshotHint="主 Agent 首次运行后即可提问"
+      emptyDescription="根据当前 Agent 的上下文回答，主任务继续运行。"
+    >
       {/* header: which agent + live + token meta */}
       <div className="flex min-w-0 flex-wrap items-center gap-2 border-b px-4 py-2.5">
         <Bot className="text-muted-foreground size-4 shrink-0" />

web/src/app/(main)/function/tasks/detail/_tabs/sessions-tab.tsx

@@ -1757,6 +1757,15 @@ export function SessionsTab({ taskId, requestedSession = "" }: { taskId: string;
         <SideQuestionWorkspace
           side={side}
           label={active.role === "worker" ? `Worker #${active.intent_id} · ${activeDisplayTitle}` : activeDisplayTitle}
+          noSnapshotHint={
+            isMain ? "有任务描述、Planner/Worker 结果或发现记录后即可提问" : "对应 Worker 首次运行后即可提问"
+          }
+          emptyDescription={
+            isMain
+              ? "根据当前任务上下文回答，主任务继续运行；暂停或尚未运行主 Agent 也可以提问。"
+              : "根据当前 Worker 的上下文回答，旁路问答不会执行工具。"
+          }
+          placeholder={isMain ? "询问当前任务上下文…" : "询问当前 Worker 上下文…"}
         >
           <div className="flex min-h-0 flex-1 min-w-0 flex-col overflow-hidden rounded-lg border bg-card">
             <div className="flex min-w-0 flex-wrap items-center gap-x-2 gap-y-1 border-b px-3 py-2 sm:px-4 sm:py-2.5">

web/src/components/approval-records.tsx

@@ -459,6 +459,8 @@ export function ApprovalDetail({
       label={`审批 #${row.id} · ${row.tool_name}`}
       composerLayout="stacked"
       placeholder="询问此审批中的脚本或审查理由…"
+      noSnapshotHint="当前审批材料准备好后即可提问"
+      emptyDescription="根据当前审批材料回答，旁路问答不会执行脚本。"
       suggestions={[
         "此脚本的作用是什么？",
         "脚本会修改哪些文件或数据？",

web/src/components/side-question-workspace.tsx

@@ -53,12 +53,16 @@ function SidePanel({
   composerLayout,
   suggestions,
   placeholder,
+  noSnapshotHint,
+  emptyDescription,
 }: {
   side: SideQuestions;
   label: string;
   composerLayout: ComposerLayout;
   suggestions?: string[];
   placeholder?: string;
+  noSnapshotHint?: string;
+  emptyDescription?: string;
 }) {
   const inlineComposer = composerLayout === "inline";
   const [confirm, setConfirm] = useState(false);
@@ -93,13 +97,13 @@ function SidePanel({
         </Button>
       </div>
       <div className="border-b px-3 py-2 text-muted-foreground text-xs">
-        {side.snapshot ? (
+        {side.snapshot?.available ? (
           <>
             <p>{side.snapshot.model.model}</p>
             <p>上下文更新于 {new Date(side.snapshot.captured_at).toLocaleString()}</p>
           </>
         ) : (
-          "有任务描述、Planner/Worker 结果或发现记录后即可提问"
+          noSnapshotHint ?? "主 Agent 首次运行后即可提问"
         )}
       </div>
       <div
@@ -120,7 +124,7 @@ function SidePanel({
           <Empty>
             <EmptyHeader>
               <EmptyTitle>随时问一个问题</EmptyTitle>
-              <EmptyDescription>根据当前任务上下文回答，主任务继续运行；暂停或尚未运行主 Agent 也可以提问。</EmptyDescription>
+              <EmptyDescription>{emptyDescription ?? "根据当前 Agent 的上下文回答，主任务继续运行。"}</EmptyDescription>
             </EmptyHeader>
           </Empty>
         )}
@@ -158,9 +162,9 @@ function SidePanel({
         </div>
       </div>
       <div className="shrink-0 border-t p-3">
-        {(side.error || side.snapshot?.reason) && (
+        {(side.error || side.snapshotError || side.snapshot?.reason) && (
           <Alert variant="destructive" className="mb-2">
-            <AlertDescription>{side.error || side.snapshot?.reason}</AlertDescription>
+            <AlertDescription>{side.error || side.snapshotError || side.snapshot?.reason}</AlertDescription>
           </Alert>
         )}
         <InputGroup className={inlineComposer ? "min-h-10" : "min-h-9"}>
@@ -252,6 +256,8 @@ export function SideQuestionWorkspace({
   composerLayout = "stacked",
   suggestions,
   placeholder,
+  noSnapshotHint,
+  emptyDescription,
   className,
   mainClassName,
 }: {
@@ -262,6 +268,8 @@ export function SideQuestionWorkspace({
   composerLayout?: ComposerLayout;
   suggestions?: string[];
   placeholder?: string;
+  noSnapshotHint?: string;
+  emptyDescription?: string;
   className?: string;
   mainClassName?: string;
 }) {
@@ -281,6 +289,8 @@ export function SideQuestionWorkspace({
                 composerLayout={composerLayout}
                 suggestions={suggestions}
                 placeholder={placeholder}
+                noSnapshotHint={noSnapshotHint}
+                emptyDescription={emptyDescription}
               />
             </div>
           </div>
@@ -302,6 +312,8 @@ export function SideQuestionWorkspace({
               composerLayout={composerLayout}
               suggestions={suggestions}
               placeholder={placeholder}
+              noSnapshotHint={noSnapshotHint}
+              emptyDescription={emptyDescription}
             />
           </ResizablePanel>
         </ResizablePanelGroup>
@@ -320,6 +332,8 @@ export function SideQuestionWorkspace({
             composerLayout={composerLayout}
             suggestions={suggestions}
             placeholder={placeholder}
+            noSnapshotHint={noSnapshotHint}
+            emptyDescription={emptyDescription}
           />
         </DrawerContent>
       </Drawer>

web/src/hooks/use-side-questions.ts

@@ -28,6 +28,7 @@ export function useSideQuestions(parent: string | null) {
   const [open, setOpen] = useState(false);
   const [items, setItems] = useState<SideExchange[]>([]);
   const [snapshot, setSnapshot] = useState<SideHistory["snapshot"]>(null);
+  const [snapshotError, setSnapshotError] = useState("");
   const [draft, setDraft] = useState("");
   const [busy, setBusy] = useState(false);
   const [loading, setLoading] = useState(false);
@@ -64,6 +65,7 @@ export function useSideQuestions(parent: string | null) {
         setItems((old) => merge(old, data.items));
         restoreFailedDraft(data.items);
         setSnapshot(data.snapshot);
+        setSnapshotError(data.snapshot_error ?? "");
         setLoadError("");
         if (before || !cursor.current) {
           cursor.current = data.next_cursor;
@@ -81,6 +83,7 @@ export function useSideQuestions(parent: string | null) {
     setStateParent(parent);
     setItems([]);
     setSnapshot(null);
+    setSnapshotError("");
     setNextCursor(0);
     setDraft("");
     setError("");
@@ -103,6 +106,7 @@ export function useSideQuestions(parent: string | null) {
         if (version !== epoch.current) return;
         setItems((old) => merge(old, data.items));
         setSnapshot(data.snapshot);
+        setSnapshotError(data.snapshot_error ?? "");
         setNextCursor(data.next_cursor);
         cursor.current = data.next_cursor;
       })
@@ -231,6 +235,7 @@ export function useSideQuestions(parent: string | null) {
     setOpen,
     items: current ? items : [],
     snapshot: current ? snapshot : null,
+    snapshotError: current ? snapshotError : "",
     draft: current ? draft : "",
     setDraft,
     busy: current && busy,

web/src/lib/side-questions.ts

@@ -34,6 +34,7 @@ export interface SideHistory {
   current: SideExchange | null;
   next_cursor: number;
   snapshot: { captured_at: string; model: SideModel; available: boolean; reason: string } | null;
+  snapshot_error?: string;
 }
 
 async function request<T>(path: string, method = "GET", body?: unknown): Promise<T> {
@@ -61,6 +62,7 @@ export const sideAPI = {
       current: data?.current ?? null,
       next_cursor: Number(data?.next_cursor) || 0,
       snapshot: data?.snapshot ?? null,
+      snapshot_error: data?.snapshot_error ?? "",
     } satisfies SideHistory;
   },
   ask: (parent: string, question: string, client_request_id: string) =>