feat: enhance call end coordination with state management

- Added support for tracking call end states (pending, speaking, cancelled) in CallEndCoordinator.
- Introduced a callback mechanism for state changes to allow external handling of call end states.
- Updated pipeline and tests to accommodate new state management features, ensuring proper handling of call end scenarios.

frontend/src/components/assistant-editor/debug-preview.tsx

@@ -58,6 +58,7 @@ import {
   createUserInputId,
   useVoicePreview,
   type ChatMessage,
+  type CallEndState,
   type ClientToolDefinition,
   type UserInputPart,
   type VoicePreview,
@@ -273,6 +274,7 @@ export function DebugDrawer({
               <DebugConnectionStatus
                 status={preview.status}
                 micWarning={preview.micWarning}
+                callEndState={preview.callEndState}
               />
             </>
           )}
@@ -724,6 +726,7 @@ function DeviceSelectField({
   value,
   devices,
   onSelect,
+  disabled = false,
 }: {
   icon: React.ReactNode;
   ariaLabel: string;
@@ -732,9 +735,11 @@ function DeviceSelectField({
   value: string;
   devices: MediaDeviceInfo[];
   onSelect: (deviceId: string) => void;
+  disabled?: boolean;
 }) {
   return (
     <Select
+      disabled={disabled}
       value={value || "default"}
       onValueChange={(nextValue) =>
         onSelect(nextValue === "default" ? "" : nextValue)
@@ -769,7 +774,13 @@ function DeviceSelectField({
   );
 }
 
-function MicrophoneDeviceField({ preview }: { preview: VoicePreview }) {
+function MicrophoneDeviceField({
+  preview,
+  disabled = false,
+}: {
+  preview: VoicePreview;
+  disabled?: boolean;
+}) {
   return (
     <DeviceSelectField
       icon={<Mic size={15} className="shrink-0 text-muted-soft" />}
@@ -779,6 +790,7 @@ function MicrophoneDeviceField({ preview }: { preview: VoicePreview }) {
       value={preview.selectedDeviceId}
       devices={preview.audioInputs}
       onSelect={(deviceId) => preview.selectDevice(deviceId)}
+      disabled={disabled}
     />
   );
 }
@@ -808,11 +820,13 @@ function DebugInputModeButton({
   label,
   onClick,
   children,
+  disabled = false,
 }: {
   selected: boolean;
   label: string;
   onClick: () => void;
   children: React.ReactNode;
+  disabled?: boolean;
 }) {
   return (
     <button
@@ -820,12 +834,14 @@ function DebugInputModeButton({
       aria-label={label}
       aria-pressed={selected}
       title={label}
+      disabled={disabled}
       onClick={onClick}
       className={[
         "flex h-8 w-8 shrink-0 items-center justify-center rounded-full transition-colors",
         selected
           ? "bg-surface-strong text-foreground"
           : "text-muted-soft hover:bg-surface-strong hover:text-foreground",
+        disabled ? "cursor-not-allowed" : "",
       ].join(" ")}
     >
       {children}
@@ -875,6 +891,12 @@ function DebugVoicePanel({
     audioRef,
   } = preview;
   const recording = status === "connecting" || status === "connected";
+  const callEndActive =
+    preview.callEndState.phase === "pending" ||
+    preview.callEndState.phase === "speaking";
+  const canInterruptEnd =
+    callEndActive && preview.callEndState.interruptible;
+  const endInputLocked = callEndActive && !preview.callEndState.interruptible;
   const [textDraft, setTextDraft] = useState("");
   const [inputMode, setInputMode] = useState<DebugInputMode>("mic");
   const [pendingImage, setPendingImage] =
@@ -1181,6 +1203,30 @@ function DebugVoicePanel({
       </div>
 
       <div className="shrink-0 border-t border-hairline bg-card p-3">
+        {callEndActive && (
+          <div
+            role="status"
+            aria-live="polite"
+            className="mb-2 flex min-w-0 items-center gap-2 px-2 text-[11px] leading-4 text-muted-foreground"
+          >
+            <span
+              aria-hidden
+              className={[
+                "h-1.5 w-1.5 shrink-0 rounded-full",
+                canInterruptEnd
+                  ? "animate-pulse bg-gradient-peach"
+                  : "bg-muted-soft",
+              ].join(" ")}
+            />
+            <span className="truncate">
+              {canInterruptEnd
+                ? preview.callEndState.voiceInterruptible
+                  ? "直接说话或发送文字，可以继续对话"
+                  : "发送文字可以继续对话；当前未开启语音打断"
+                : "输入已暂停，结束语播放完成后将结束对话"}
+            </span>
+          </div>
+        )}
         <div className="flex items-end gap-2">
           <div className="min-w-0 flex-1">
             <div
@@ -1191,7 +1237,10 @@ function DebugVoicePanel({
                 "relative flex min-h-10 min-w-0 items-end gap-1 overflow-hidden rounded-[1.4rem] border bg-background px-2 transition-colors",
                 draggingImage
                   ? "border-foreground"
-                  : "border-hairline-strong",
+                  : canInterruptEnd
+                    ? "border-gradient-peach shadow-[0_0_0_2px_color-mix(in_srgb,var(--gradient-peach)_16%,transparent)]"
+                    : "border-hairline-strong",
+                endInputLocked ? "pointer-events-none opacity-55" : "",
               ].join(" ")}
             >
               <div className="mb-1 flex shrink-0 items-center gap-0.5 rounded-full bg-canvas-soft p-0.5">
@@ -1199,6 +1248,7 @@ function DebugVoicePanel({
                   selected={inputMode === "mic"}
                   label="选择麦克风设备"
                   onClick={() => setInputMode("mic")}
+                  disabled={endInputLocked}
                 >
                   <Mic size={15} />
                 </DebugInputModeButton>
@@ -1206,13 +1256,17 @@ function DebugVoicePanel({
                   selected={inputMode === "text"}
                   label="文字输入"
                   onClick={() => setInputMode("text")}
+                  disabled={endInputLocked}
                 >
                   <MessageSquareText size={15} />
                 </DebugInputModeButton>
               </div>
               {inputMode === "mic" ? (
                 <div className="flex min-w-0 flex-1">
-                  <MicrophoneDeviceField preview={preview} />
+                  <MicrophoneDeviceField
+                    preview={preview}
+                    disabled={endInputLocked}
+                  />
                 </div>
               ) : (
                 <div className="min-w-0 flex-1 py-1">
@@ -1254,7 +1308,9 @@ function DebugVoicePanel({
                   <Textarea
                     rows={1}
                     value={textDraft}
-                    disabled={status !== "connected" || sendingInput}
+                    disabled={
+                      status !== "connected" || sendingInput || endInputLocked
+                    }
                     onChange={(event) => {
                       setTextDraft(event.target.value);
                       if (inputError) setInputError("");
@@ -1272,7 +1328,9 @@ function DebugVoicePanel({
                     }}
                     placeholder={
                       status === "connected"
-                        ? vision
+                        ? canInterruptEnd
+                          ? "输入内容以继续对话…"
+                          : vision
                           ? "输入文字，或粘贴 / 拖入图片…"
                           : "输入文字发送给助手，将打断当前播报…"
                         : "开始对话后可输入文字…"
@@ -1302,6 +1360,7 @@ function DebugVoicePanel({
               disabled={
                 status !== "connected" ||
                 sendingInput ||
+                endInputLocked ||
                 (!textDraft.trim() && !pendingImage)
               }
               onClick={() => void handleSendInput()}
@@ -1661,13 +1720,27 @@ function DebugVideoPanel({
 function DebugConnectionStatus({
   status,
   micWarning,
+  callEndState,
 }: {
   status: VoicePreviewStatus;
   micWarning: string | null;
+  callEndState: CallEndState;
 }) {
   const recording = status === "connecting" || status === "connected";
+  const ending =
+    callEndState.phase === "pending" || callEndState.phase === "speaking";
   const label =
-    status === "connecting"
+    status === "connected" && callEndState.phase === "cancelled"
+      ? "已继续对话"
+      : status === "connected" && ending
+        ? callEndState.phase === "pending"
+          ? callEndState.interruptible
+            ? "准备结束 · 可打断"
+            : "准备结束"
+          : callEndState.interruptible
+            ? "结束语播放中 · 可打断"
+            : "结束语播放中 · 即将结束"
+    : status === "connecting"
       ? "连接中…"
       : status === "connected"
         ? micWarning
@@ -1678,11 +1751,19 @@ function DebugConnectionStatus({
           : "准备开始";
 
   return (
-    <span className="flex min-w-0 items-center gap-1.5 truncate text-xs text-muted-foreground">
+    <span
+      role="status"
+      aria-live="polite"
+      className="flex min-w-0 items-center gap-1.5 truncate text-xs text-muted-foreground"
+    >
       <span
         className={[
           "h-1.5 w-1.5 shrink-0 rounded-full",
-          recording
+          status === "connected" && ending && callEndState.interruptible
+            ? "animate-pulse bg-gradient-peach"
+            : status === "connected" && callEndState.phase === "cancelled"
+              ? "bg-success"
+          : recording
             ? "animate-pulse bg-success"
             : status === "failed"
               ? "bg-destructive"