diff --git a/app/services/ai_image.py b/app/services/ai_image.py
index b13db67..7e762c6 100644
--- a/app/services/ai_image.py
+++ b/app/services/ai_image.py
@@ -1,6 +1,10 @@
 """AI 图片生成服务：后端请求 + 本地缓存管理。
 
-API 端点待接入，当前通过 ``set_api_caller`` 注入具体实现。
+后端接口（测试环境）：
+    POST {API_BASE_URL}{API_PATH}
+    body: {"user_message": str, "session_id": str}
+    resp: {"code": 200, "message": "", "data": {"imageUrl": "..."}}
+
 缓存目录：``settings/ai_image_cache/``，每张图片有同名的 ``.json`` 侧车记录。
 """
 
@@ -9,15 +13,24 @@ from __future__ import annotations
 import datetime as _dt
 import hashlib
 import json
+import logging
 import mimetypes
 import os
 import shutil
 import threading
+import time
+import uuid
+from io import BytesIO
 from dataclasses import dataclass, asdict
 from typing import Callable, List, Optional
 from urllib.parse import urlparse
 from urllib.request import Request, urlopen
 
+from PIL import Image
+
+
+logger = logging.getLogger(__name__)
+
 
 # ---------- 常量 ----------
 
@@ -25,41 +38,166 @@ _CACHE_DIRNAME = os.path.join("settings", "ai_image_cache")
 _META_SUFFIX = ".json"
 _SUPPORTED_IMG_EXT = (".png", ".jpg", ".jpeg", ".bmp", ".webp")
 
+# 测试环境后端
+API_BASE_URL = "http://10.201.44.70:9018/ai-agent/"
+API_PATH = "api/v1/pqtest/generate"
+API_TIMEOUT = 90.0  # 后端最长 60s，留余量
+
+# 进程级会话 id（多轮对话需保持一致），可通过 ``reset_session`` 重置
+_session_id: str = str(uuid.uuid4())
+_session_lock = threading.Lock()
+
+
+def get_session_id() -> str:
+    with _session_lock:
+        return _session_id
+
+
+def set_session_id(session_id: str) -> str:
+    """切换到指定会话。空值会抛错。"""
+    global _session_id
+    sid = (session_id or "").strip()
+    if not sid:
+        raise ValueError("session_id 不能为空")
+    with _session_lock:
+        old = _session_id
+        _session_id = sid
+        logger.info("[AIImage] 会话切换 %s -> %s", _mask_sid(old), _mask_sid(_session_id))
+        return _session_id
+
+
+def reset_session() -> str:
+    """开启新一轮会话，返回新的 session_id。"""
+    global _session_id
+    with _session_lock:
+        old = _session_id
+        _session_id = str(uuid.uuid4())
+        logger.info("[AIImage] 会话切换 %s -> %s", _mask_sid(old), _mask_sid(_session_id))
+        return _session_id
+
+
+def _mask_sid(sid: str) -> str:
+    """日志安全展示：仅保留前 8 位。"""
+    if not sid:
+        return "(none)"
+    return f"{sid[:8]}…"
+
+
+def _truncate(text: str, n: int = 80) -> str:
+    s = (text or "").replace("\n", " ").strip()
+    return s if len(s) <= n else s[:n] + "…"
+
 
 # ---------- 数据结构 ----------
 
 
 @dataclass
 class AIImageRecord:
-    """一条缓存记录。"""
+    """一条缓存记录。
+
+    字段说明：
+    - ``id``: 唯一 id，等同于磁盘文件名（不含扩展名），格式 ``{时间戳}_{md5前8}``。
+    - ``prompt``: 用户原始输入（完整保留，用于回溯/调试，不应被改写）。
+    - ``title``: 用户自定义展示标题（重命名时写入），UI 优先使用，留空则回退 prompt 第一行截断。
+    - ``image_path``: 图片在缓存目录中的绝对路径。
+    - ``created_at``: ISO8601 时间字符串。
+    - ``extra``: 其它元数据，至少包含 ``source`` 与 ``session_id``（标识属于哪一轮对话）。
+    """
 
     id: str
     prompt: str
     image_path: str
     created_at: str  # ISO8601
     extra: Optional[dict] = None
+    title: Optional[str] = None
 
     def to_json(self) -> str:
         return json.dumps(asdict(self), ensure_ascii=False, indent=2)
 
+    @property
+    def display_name(self) -> str:
+        """UI 展示名：title 优先，否则回退 prompt 第一行。"""
+        if self.title:
+            return self.title.strip()
+        first = (self.prompt or "").strip().splitlines()[0] if self.prompt else ""
+        return first or "(未命名)"
 
-# ---------- API 注入 ----------
-
-# 调用签名: ``fn(prompt: str) -> (image_bytes: bytes, image_ext: str, extra: dict|None)``
-# ``image_ext`` 例如 ``".png"``；``extra`` 可为 None。
-_ApiCaller = Callable[[str], tuple]
-
-_api_caller: Optional[_ApiCaller] = None
+    @property
+    def session_id(self) -> str:
+        if isinstance(self.extra, dict):
+            return str(self.extra.get("session_id") or "")
+        return ""
 
 
-def set_api_caller(fn: Optional[_ApiCaller]) -> None:
-    """注入真实的后端 API 调用函数。在 API 就绪前可保持为 None。"""
-    global _api_caller
-    _api_caller = fn
+# ---------- 后端 API ----------
 
 
-def has_api() -> bool:
-    return _api_caller is not None
+def _api_endpoint() -> str:
+    base = API_BASE_URL if API_BASE_URL.endswith("/") else API_BASE_URL + "/"
+    return base + API_PATH.lstrip("/")
+
+
+def _call_pqtest_generate(user_message: str, session_id: str, timeout: float = API_TIMEOUT) -> str:
+    """调用后端 ``api/v1/pqtest/generate``，返回 imageUrl。失败抛异常。"""
+    payload = json.dumps(
+        {"user_message": user_message,
+         "session_id": session_id},
+        ensure_ascii=False,
+    ).encode("utf-8")
+    endpoint = _api_endpoint()
+    logger.info(
+        "[AIImage] 请求生成 sid=%s prompt_len=%d prompt=%r",
+        _mask_sid(session_id), len(user_message or ""), _truncate(user_message),
+    )
+    logger.debug("[AIImage] POST %s timeout=%.1fs", endpoint, timeout)
+    request = Request(
+        endpoint,
+        data=payload,
+        method="POST",
+        headers={
+            "Content-Type": "application/json; charset=utf-8",
+            "Accept": "application/json",
+            "User-Agent": "pqAutomationApp/1.0",
+        },
+    )
+    t0 = time.monotonic()
+    try:
+        with urlopen(request, timeout=timeout) as response:
+            raw = response.read()
+            http_status = response.status
+    except Exception as exc:
+        elapsed = time.monotonic() - t0
+        logger.error(
+            "[AIImage] 请求异常 sid=%s elapsed=%.2fs %s: %s",
+            _mask_sid(session_id), elapsed, type(exc).__name__, exc,
+        )
+        raise
+    elapsed = time.monotonic() - t0
+    logger.debug(
+        "[AIImage] HTTP %s 收到 %d bytes elapsed=%.2fs",
+        http_status, len(raw), elapsed,
+    )
+    try:
+        result = json.loads(raw.decode("utf-8"))
+    except Exception as exc:
+        logger.error("[AIImage] 响应解析失败 sid=%s raw=%r", _mask_sid(session_id), raw[:200])
+        raise RuntimeError(f"AI 接口返回非 JSON：{raw[:200]!r}") from exc
+
+    code = result.get("code")
+    message = result.get("message") or ""
+    data = result.get("data") or {}
+    image_url = (data.get("imageUrl") or "").strip()
+    if code != 200 or not image_url:
+        logger.warning(
+            "[AIImage] 接口失败 sid=%s code=%s msg=%r",
+            _mask_sid(session_id), code, message,
+        )
+        raise RuntimeError(f"AI 接口失败 code={code} msg={message or '生成失败'}")
+    logger.info(
+        "[AIImage] 生成成功 sid=%s elapsed=%.2fs url=%s",
+        _mask_sid(session_id), elapsed, image_url,
+    )
+    return image_url
 
 
 # ---------- 缓存路径工具 ----------
@@ -83,6 +221,28 @@ def _meta_path_for(image_path: str) -> str:
     return os.path.splitext(image_path)[0] + _META_SUFFIX
 
 
+def _sanitize_image_bytes(image_bytes: bytes, image_ext: str) -> bytes:
+    """规范化图片字节，尽量去掉已知有问题的 PNG ICC profile。"""
+    ext = (image_ext or "").lower()
+    if ext not in {".png", ".jpg", ".jpeg", ".bmp", ".webp"}:
+        return image_bytes
+    try:
+        with Image.open(BytesIO(image_bytes)) as img:
+            img.load()
+            normalized = img.copy()
+        output = BytesIO()
+        save_kwargs = {}
+        if ext == ".png":
+            save_kwargs["icc_profile"] = None
+        normalized.save(output, format=normalized.format or ext.lstrip(".").upper(), **save_kwargs)
+        result = output.getvalue()
+        if result:
+            return result
+    except Exception as exc:
+        logger.warning("[AIImage] 图片规范化失败 ext=%s %s: %s", ext, type(exc).__name__, exc)
+    return image_bytes
+
+
 # ---------- 读写 ----------
 
 
@@ -98,6 +258,7 @@ def list_records(base_dir: Optional[str] = None) -> List[AIImageRecord]:
         prompt = ""
         created_at = ""
         extra = None
+        title = None
         rec_id = os.path.splitext(name)[0]
         if os.path.isfile(meta_path):
             try:
@@ -106,6 +267,7 @@ def list_records(base_dir: Optional[str] = None) -> List[AIImageRecord]:
                 prompt = data.get("prompt", "")
                 created_at = data.get("created_at", "")
                 extra = data.get("extra")
+                title = data.get("title")
                 rec_id = data.get("id", rec_id)
             except Exception:
                 pass
@@ -123,54 +285,27 @@ def list_records(base_dir: Optional[str] = None) -> List[AIImageRecord]:
                 image_path=full,
                 created_at=created_at,
                 extra=extra,
+                title=title,
             )
         )
-    if not records:
-        seeded = _seed_placeholder_record(cache_dir)
-        if seeded is not None:
-            records.append(seeded)
     records.sort(key=lambda r: r.created_at, reverse=True)
     return records
 
 
-def _seed_placeholder_record(cache_dir: str) -> Optional[AIImageRecord]:
-    """当缓存为空时，写入一张本地占位图，便于前端联调。"""
-    try:
-        repo_root = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))
-        src = os.path.join(repo_root, "assets", "entry_1.png")
-        if not os.path.isfile(src):
-            return None
-
-        rec_id = f"{_dt.datetime.now().strftime('%Y%m%d_%H%M%S')}_placeholder"
-        image_path = os.path.join(cache_dir, f"{rec_id}.png")
-        shutil.copyfile(src, image_path)
-
-        record = AIImageRecord(
-            id=rec_id,
-            prompt="本地测试占位图（后端未接入）",
-            image_path=image_path,
-            created_at=_dt.datetime.now().isoformat(timespec="seconds"),
-            extra={"source": "local-placeholder"},
-        )
-        with open(_meta_path_for(image_path), "w", encoding="utf-8") as f:
-            f.write(record.to_json())
-        return record
-    except Exception:
-        return None
-
-
 def save_image_to_cache(
     prompt: str,
     image_bytes: bytes,
     image_ext: str = ".png",
     extra: Optional[dict] = None,
     base_dir: Optional[str] = None,
+    title: Optional[str] = None,
 ) -> AIImageRecord:
     """把生成的图片字节写入缓存，返回记录。"""
     if not image_ext.startswith("."):
         image_ext = "." + image_ext
     if image_ext.lower() not in _SUPPORTED_IMG_EXT:
         image_ext = ".png"
+    image_bytes = _sanitize_image_bytes(image_bytes, image_ext)
     cache_dir = get_cache_dir(base_dir)
     rec_id = _make_id(prompt)
     image_path = os.path.join(cache_dir, f"{rec_id}{image_ext}")
@@ -183,6 +318,7 @@ def save_image_to_cache(
         image_path=image_path,
         created_at=_dt.datetime.now().isoformat(timespec="seconds"),
         extra=extra,
+        title=title,
     )
     try:
         with open(_meta_path_for(image_path), "w", encoding="utf-8") as f:
@@ -256,6 +392,53 @@ def export_record(record: AIImageRecord, dest_path: str) -> None:
     shutil.copyfile(record.image_path, dest_path)
 
 
+def update_record_title(record: AIImageRecord, new_title: Optional[str]) -> bool:
+    """更新记录的展示标题并写回侧车 JSON。空串/None 视为清除标题。"""
+    title = (new_title or "").strip() or None
+    meta_path = _meta_path_for(record.image_path)
+    try:
+        data: dict = {}
+        if os.path.isfile(meta_path):
+            with open(meta_path, "r", encoding="utf-8") as f:
+                data = json.load(f) or {}
+        if title is None:
+            data.pop("title", None)
+        else:
+            data["title"] = title
+        with open(meta_path, "w", encoding="utf-8") as f:
+            json.dump(data, f, ensure_ascii=False, indent=2)
+    except Exception:
+        return False
+    record.title = title
+    return True
+
+
+def group_records_by_session(records: List[AIImageRecord]) -> List[dict]:
+    """按 ``session_id`` 分组。
+
+    返回元素：``{"session_id", "records", "started_at", "latest_at"}``。
+    会话按"最近使用时间"倒序，组内记录按时间倒序。
+    没有 session_id 的记录归到空串 ``""`` 组。
+    """
+    buckets: dict = {}
+    for rec in records:
+        buckets.setdefault(rec.session_id, []).append(rec)
+    sessions = []
+    for sid, recs in buckets.items():
+        recs.sort(key=lambda r: r.created_at, reverse=True)
+        started_at = min((r.created_at for r in recs if r.created_at), default="")
+        sessions.append(
+            {
+                "session_id": sid,
+                "records": recs,
+                "started_at": started_at,
+                "latest_at": recs[0].created_at if recs else "",
+            }
+        )
+    sessions.sort(key=lambda s: s["latest_at"], reverse=True)
+    return sessions
+
+
 # ---------- 异步请求 ----------
 
 
@@ -264,27 +447,37 @@ def request_image_async(
     on_success: Callable[[AIImageRecord], None],
     on_error: Callable[[Exception], None],
     base_dir: Optional[str] = None,
+    session_id: Optional[str] = None,
 ) -> threading.Thread:
-    """在后台线程请求 API → 写入缓存 → 回调。
+    """在后台线程调用后端 API → 下载图片 → 写入缓存 → 回调。
 
     ``on_success`` / ``on_error`` 会在 **工作线程** 中被调用；UI 侧若需
     切回主线程，请在回调内部自行用 ``root.after(0, ...)``。
+
+    ``session_id`` 留空则使用进程级会话 id（保证多轮对话上下文）。
     """
 
+    sid = session_id or get_session_id()
+
     def _worker():
         try:
-            if _api_caller is None:
-                raise RuntimeError("AI 图片 API 尚未接入，请调用 set_api_caller 注入")
-            image_bytes, image_ext, extra = _normalize_api_result(_api_caller(prompt))
-            record = save_image_to_cache(
+            image_url = _call_pqtest_generate(prompt, sid)
+            record = import_image_from_url(
+                image_url=image_url,
                 prompt=prompt,
-                image_bytes=image_bytes,
-                image_ext=image_ext,
-                extra=extra,
+                extra={"source": "ai-api", "session_id": sid},
                 base_dir=base_dir,
             )
+            logger.info(
+                "[AIImage] 已写入缓存 sid=%s id=%s path=%s",
+                _mask_sid(sid), record.id, record.image_path,
+            )
             on_success(record)
         except Exception as exc:
+            logger.error(
+                "[AIImage] 生成流程失败 sid=%s %s: %s",
+                _mask_sid(sid), type(exc).__name__, exc,
+            )
             on_error(exc)
 
     t = threading.Thread(target=_worker, daemon=True)
@@ -321,18 +514,6 @@ def import_image_from_url_async(
     return t
 
 
-def _normalize_api_result(result):
-    """允许 API 返回 ``bytes`` 或 ``(bytes, ext)`` 或 ``(bytes, ext, extra)``。"""
-    if isinstance(result, (bytes, bytearray)):
-        return bytes(result), ".png", None
-    if isinstance(result, tuple):
-        if len(result) == 2:
-            return bytes(result[0]), str(result[1]), None
-        if len(result) == 3:
-            return bytes(result[0]), str(result[1]), result[2]
-    raise ValueError("API 返回格式不支持，需为 bytes 或 (bytes, ext[, extra])")
-
-
 def is_remote_image_url(value: str) -> bool:
     """判断输入是否为 http/https 图片地址。"""
     url = (value or "").strip()
diff --git a/app/views/panels/ai_image_panel.py b/app/views/panels/ai_image_panel.py
index 6d22603..a0398a6 100644
--- a/app/views/panels/ai_image_panel.py
+++ b/app/views/panels/ai_image_panel.py
@@ -28,6 +28,8 @@ def create_ai_image_panel(self):
     self.ai_image_current = None        # AIImageRecord | None
     self.ai_image_photo = None          # 防止 ImageTk.PhotoImage 被 GC
     self._ai_image_requesting = False
+    self._ai_image_progress_job = None
+    self._ai_image_progress_phase = 0
 
     container = ttk.Frame(frame, padding=10)
     container.pack(fill=tk.BOTH, expand=True)
@@ -150,11 +152,24 @@ def create_ai_image_panel(self):
         send_row, textvariable=self.ai_image_status_var,
         foreground="#888", font=("微软雅黑", 9),
     ).pack(side=tk.LEFT)
+    self.ai_image_progress = ttk.Progressbar(
+        send_row,
+        mode="indeterminate",
+        length=120,
+        bootstyle="info-striped",
+    )
+    self.ai_image_progress.pack(side=tk.LEFT, padx=(8, 0))
+    self.ai_image_progress.pack_forget()
     self.ai_image_send_btn = ttk.Button(
         send_row, text="发送", bootstyle="primary", width=10,
         command=lambda: _send_prompt(self),
     )
     self.ai_image_send_btn.pack(side=tk.RIGHT)
+    self.ai_image_new_session_btn = ttk.Button(
+        send_row, text="新对话", bootstyle="secondary-outline", width=10,
+        command=lambda: _start_new_session(self),
+    )
+    self.ai_image_new_session_btn.pack(side=tk.RIGHT, padx=(0, 6))
 
     # 注册面板
     self.register_panel("ai_image", frame, None, "ai_image_visible")
@@ -173,17 +188,49 @@ def toggle_ai_image_panel(self):
 
 
 def reload_ai_image_list(self):
-    """重新扫描缓存并刷新列表。"""
+    """重新扫描缓存并刷新列表。
+
+    按 ``session_id`` 分组：每个会话用一行不可选的分隔头（``── 会话 #N · 时间 ──``），
+    其下列出该轮生成的所有图片。会话按"最近使用"倒序，组内按时间倒序。
+    """
     self.ai_image_records = _svc.list_records()
     self.ai_image_listbox.delete(0, tk.END)
-    for rec in self.ai_image_records:
-        label = _format_list_label(rec)
-        self.ai_image_listbox.insert(tk.END, label)
+    # 维护行号 → 记录索引的映射；分隔头处为 None
+    self._ai_image_row_map = []
+    self._ai_image_row_session_map = []
+    sessions = _svc.group_records_by_session(self.ai_image_records)
+    flat = []
+    current_sid = _svc.get_session_id()
+    for idx, sess in enumerate(sessions, start=1):
+        sid = sess["session_id"]
+        is_current = sid and sid == current_sid
+        header = _format_session_header(idx, sess, is_current=is_current)
+        self.ai_image_listbox.insert(tk.END, header)
+        # 头部行：禁用选中（视觉上变灰）
+        last = self.ai_image_listbox.size() - 1
+        self.ai_image_listbox.itemconfig(
+            last, foreground="#888", selectforeground="#888",
+            background="#f5f5f5", selectbackground="#f5f5f5",
+        )
+        self._ai_image_row_map.append(None)
+        self._ai_image_row_session_map.append(sid)
+        for rec in sess["records"]:
+            label = "  " + _format_list_label(rec)
+            self.ai_image_listbox.insert(tk.END, label)
+            self._ai_image_row_map.append(len(flat))
+            self._ai_image_row_session_map.append(rec.session_id)
+            flat.append(rec)
+    # 替换为按显示顺序展平后的列表，便于其它逻辑（前一张/后一张等）
+    self.ai_image_records = flat
     if self.ai_image_records:
-        self.ai_image_listbox.selection_clear(0, tk.END)
-        self.ai_image_listbox.selection_set(0)
-        self.ai_image_listbox.activate(0)
-        _select_record(self, self.ai_image_records[0])
+        # 选中第一张实际记录
+        for row, ridx in enumerate(self._ai_image_row_map):
+            if ridx is not None:
+                self.ai_image_listbox.selection_clear(0, tk.END)
+                self.ai_image_listbox.selection_set(row)
+                self.ai_image_listbox.activate(row)
+                _select_record(self, self.ai_image_records[ridx])
+                break
     else:
         self.ai_image_current = None
         self.ai_image_photo = None
@@ -191,6 +238,14 @@ def reload_ai_image_list(self):
         self.ai_image_meta_var.set("暂无缓存图片")
 
 
+def _format_session_header(index: int, sess: dict, is_current: bool) -> str:
+    started = (sess.get("started_at") or "").replace("T", " ")[:16]
+    tag = "（当前）" if is_current else ""
+    if sess.get("session_id"):
+        return f"── 会话 #{index} · {started} {tag}──"
+    return f"── 未归类 · {started} ──"
+
+
 def _format_list_label(rec: _svc.AIImageRecord) -> str:
     # 分辨率前缀：优先从 extra["size"] 取，其次从文件名猜
     size_tag = ""
@@ -205,21 +260,34 @@ def _format_list_label(rec: _svc.AIImageRecord) -> str:
         except Exception:
             pass
 
-    prompt_line = (rec.prompt or "(无提示)").strip().splitlines()[0]
-    # 剩余可用宽度（width=34）去掉 size_tag
-    max_prompt = 34 - len(size_tag) - 2
-    if max_prompt > 4 and len(prompt_line) > max_prompt:
-        prompt_line = prompt_line[:max_prompt] + "…"
-    return f"{size_tag}{prompt_line}"
+    name_line = rec.display_name.splitlines()[0] if rec.display_name else "(未命名)"
+    # 列表宽度 width=34，需要扣除两格缩进 + size_tag
+    max_name = 34 - 2 - len(size_tag) - 2
+    if max_name > 4 and len(name_line) > max_name:
+        name_line = name_line[:max_name] + "…"
+    return f"{size_tag}{name_line}"
 
 
 def _on_list_select(self):
     sel = self.ai_image_listbox.curselection()
     if not sel:
         return
-    idx = sel[0]
-    if 0 <= idx < len(self.ai_image_records):
-        _select_record(self, self.ai_image_records[idx])
+    row = sel[0]
+    row_map = getattr(self, "_ai_image_row_map", None) or []
+    if row >= len(row_map):
+        return
+    ridx = row_map[row]
+    if ridx is None:
+        session_id = _session_id_for_row(self, row)
+        if session_id:
+            _switch_to_session(self, session_id, show_message=False)
+        self.ai_image_listbox.selection_clear(row)
+        return
+    if 0 <= ridx < len(self.ai_image_records):
+        rec = self.ai_image_records[ridx]
+        if rec.session_id:
+            _switch_to_session(self, rec.session_id, show_message=False, target_record_id=rec.id)
+        _select_record(self, rec)
 
 
 def _select_record(self, rec: _svc.AIImageRecord):
@@ -243,6 +311,7 @@ def _redraw_preview(self):
     ch = canvas.winfo_height() or 1
     try:
         img = Image.open(rec.image_path)
+        img.load()
     except Exception as exc:
         canvas.create_text(cw // 2, ch // 2, text=f"加载失败: {exc}", fill="#f66")
         return
@@ -257,6 +326,58 @@ def _redraw_preview(self):
 # ---------------- 发送 / 保存 / 删除 ----------------
 
 
+def _start_new_session(self):
+    """开启新的对话会话，后续生成将使用新的 session_id。"""
+    if getattr(self, "_ai_image_requesting", False):
+        messagebox.showinfo("提示", "请等待当前请求完成")
+        return
+    _svc.reset_session()
+    self.ai_image_status_var.set("已开启新对话")
+    reload_ai_image_list(self)
+
+
+def _session_id_for_row(self, row: int) -> str:
+    session_map = getattr(self, "_ai_image_row_session_map", None) or []
+    if row < 0 or row >= len(session_map):
+        return ""
+    return session_map[row] or ""
+
+
+def _switch_to_session(self, session_id: str, show_message: bool = True, target_record_id: str = ""):
+    sid = (session_id or "").strip()
+    if not sid:
+        return
+    if sid == _svc.get_session_id():
+        return
+    _svc.set_session_id(sid)
+    reload_ai_image_list(self)
+    if target_record_id:
+        for row, ridx in enumerate(getattr(self, "_ai_image_row_map", []) or []):
+            if ridx is None:
+                continue
+            rec = self.ai_image_records[ridx]
+            if rec.id == target_record_id:
+                self.ai_image_listbox.selection_clear(0, tk.END)
+                self.ai_image_listbox.selection_set(row)
+                self.ai_image_listbox.activate(row)
+                self.ai_image_listbox.see(row)
+                _select_record(self, rec)
+                break
+    self.ai_image_status_var.set("已切换到历史对话")
+    if show_message:
+        messagebox.showinfo("提示", "已切换到所选历史对话")
+
+
+def _update_request_progress(self):
+    if not getattr(self, "_ai_image_requesting", False):
+        self._ai_image_progress_job = None
+        return
+    phases = ["后端处理中…", "正在生成图片…", "正在下载结果…", "即将完成…"]
+    self.ai_image_status_var.set(phases[self._ai_image_progress_phase % len(phases)])
+    self._ai_image_progress_phase += 1
+    self._ai_image_progress_job = self.root.after(900, lambda: _update_request_progress(self))
+
+
 def _send_prompt(self):
     if getattr(self, "_ai_image_requesting", False):
         return
@@ -267,7 +388,7 @@ def _send_prompt(self):
 
     _set_requesting(self, True)
     is_remote_url = _svc.is_remote_image_url(prompt)
-    self.ai_image_status_var.set("下载中…" if is_remote_url else "请求中…")
+    self.ai_image_status_var.set("下载中…" if is_remote_url else "后端处理中…")
 
     def _success(record):
         self.root.after(0, lambda: _on_request_done(self, record, None))
@@ -283,17 +404,6 @@ def _send_prompt(self):
         )
         return
 
-    if not _svc.has_api():
-        _set_requesting(self, False)
-        self.ai_image_status_var.set("就绪")
-        messagebox.showerror(
-            "API 未配置",
-            "AI 图片 API 尚未接入。\n"
-            "可直接输入图片 URL 导入，或在启动时通过 "
-            "app.services.ai_image.set_api_caller(...) 注入真实实现。",
-        )
-        return
-
     _svc.request_image_async(prompt, on_success=_success, on_error=_error)
 
 
@@ -301,8 +411,25 @@ def _set_requesting(self, flag: bool):
     self._ai_image_requesting = flag
     try:
         self.ai_image_send_btn.configure(state=tk.DISABLED if flag else tk.NORMAL)
+        self.ai_image_new_session_btn.configure(state=tk.DISABLED if flag else tk.NORMAL)
     except Exception:
         pass
+    if flag:
+        self._ai_image_progress_phase = 0
+        self.ai_image_progress.pack(side=tk.LEFT, padx=(8, 0))
+        self.ai_image_progress.start(10)
+        if self._ai_image_progress_job is not None:
+            self.root.after_cancel(self._ai_image_progress_job)
+        self._ai_image_progress_job = self.root.after(0, lambda: _update_request_progress(self))
+    else:
+        if self._ai_image_progress_job is not None:
+            self.root.after_cancel(self._ai_image_progress_job)
+            self._ai_image_progress_job = None
+        try:
+            self.ai_image_progress.stop()
+            self.ai_image_progress.pack_forget()
+        except Exception:
+            pass
 
 
 def _on_request_done(self, record, exc):
@@ -314,13 +441,16 @@ def _on_request_done(self, record, exc):
     self.ai_image_status_var.set("完成")
     self.ai_image_input.delete("1.0", tk.END)
     reload_ai_image_list(self)
-    # 定位到新生成项（最新在前）
     if record is not None and self.ai_image_records:
-        for i, r in enumerate(self.ai_image_records):
+        for row, ridx in enumerate(getattr(self, "_ai_image_row_map", []) or []):
+            if ridx is None:
+                continue
+            r = self.ai_image_records[ridx]
             if r.id == record.id:
                 self.ai_image_listbox.selection_clear(0, tk.END)
-                self.ai_image_listbox.selection_set(i)
-                self.ai_image_listbox.activate(i)
+                self.ai_image_listbox.selection_set(row)
+                self.ai_image_listbox.activate(row)
+                self.ai_image_listbox.see(row)
                 _select_record(self, r)
                 break
 
@@ -358,53 +488,41 @@ def _delete_current(self):
 
 
 def _rename_current(self):
-    """弹窗让用户修改当前记录的备注名称（即列表显示中 size_tag 之后的部分）。"""
+    """弹窗让用户修改当前记录的展示标题（保存到侧车 ``title`` 字段，原始 prompt 不变）。"""
     rec = getattr(self, "ai_image_current", None)
     if rec is None:
         messagebox.showinfo("提示", "请先选择一张图片")
         return
 
-    current_name = rec.prompt or ""
+    current = rec.title or rec.display_name
     new_name = simpledialog.askstring(
         "重命名",
-        "修改备注名称（显示在分辨率标签后面）：",
-        initialvalue=current_name,
+        "修改显示标题（留空可恢复使用原始提示词）：",
+        initialvalue=current,
         parent=self.root,
     )
-    if new_name is None:   # 用户点了取消
+    if new_name is None:   # 取消
         return
     new_name = new_name.strip()
-    if not new_name:
-        messagebox.showwarning("提示", "备注名称不能为空")
-        return
-    if new_name == current_name:
+    if new_name == (rec.title or ""):
         return
 
-    # 写回 JSON 元数据
-    try:
-        import json
-        meta_path = os.path.splitext(rec.image_path)[0] + ".json"
-        meta = {}
-        if os.path.isfile(meta_path):
-            with open(meta_path, "r", encoding="utf-8") as f:
-                meta = json.load(f)
-        meta["prompt"] = new_name
-        with open(meta_path, "w", encoding="utf-8") as f:
-            json.dump(meta, f, ensure_ascii=False, indent=2)
-    except Exception as exc:
-        messagebox.showerror("保存失败", f"无法更新元数据:\n{exc}")
+    if not _svc.update_record_title(rec, new_name):
+        messagebox.showerror("保存失败", "无法更新元数据，请检查文件权限。")
         return
 
-    # 同步内存中的记录并刷新列表
-    rec.prompt = new_name
+    target_id = rec.id
     reload_ai_image_list(self)
-    # 重新定位到刚才被重命名的图片
-    for i, r in enumerate(self.ai_image_records):
-        if r.id == rec.id:
+    # 重新定位
+    for row, ridx in enumerate(getattr(self, "_ai_image_row_map", []) or []):
+        if ridx is None:
+            continue
+        r = self.ai_image_records[ridx]
+        if r.id == target_id:
             self.ai_image_listbox.selection_clear(0, tk.END)
-            self.ai_image_listbox.selection_set(i)
-            self.ai_image_listbox.activate(i)
-            self.ai_image_listbox.see(i)
+            self.ai_image_listbox.selection_set(row)
+            self.ai_image_listbox.activate(row)
+            self.ai_image_listbox.see(row)
             _select_record(self, r)
             break
 
@@ -415,14 +533,16 @@ def _rename_current(self):
 def _show_list_context_menu(self, event):
     """在图片列表上显示右键菜单，并根据状态启用/禁用项。"""
     try:
-        idx = self.ai_image_listbox.nearest(event.y)
+        row = self.ai_image_listbox.nearest(event.y)
     except Exception:
-        idx = -1
-    if 0 <= idx < len(self.ai_image_records):
+        row = -1
+    row_map = getattr(self, "_ai_image_row_map", None) or []
+    ridx = row_map[row] if 0 <= row < len(row_map) else None
+    if ridx is not None and 0 <= ridx < len(self.ai_image_records):
         self.ai_image_listbox.selection_clear(0, tk.END)
-        self.ai_image_listbox.selection_set(idx)
-        self.ai_image_listbox.activate(idx)
-        _select_record(self, self.ai_image_records[idx])
+        self.ai_image_listbox.selection_set(row)
+        self.ai_image_listbox.activate(row)
+        _select_record(self, self.ai_image_records[ridx])
 
     has_selection = self.ai_image_current is not None
     ucd = getattr(self, "ucd", None)
diff --git a/docs/接口文档-测试环境.pdf b/docs/接口文档-测试环境.pdf
new file mode 100644
index 0000000..86f9b5d
Binary files /dev/null and b/docs/接口文档-测试环境.pdf differ
diff --git a/pqAutomationApp.py b/pqAutomationApp.py
index 0282194..d81fbae 100644
--- a/pqAutomationApp.py
+++ b/pqAutomationApp.py
@@ -877,6 +877,14 @@ class PQAutomationApp:
 
 def main():
     try:
+        # 全局日志：默认 INFO 输出到 stderr，便于排查 AI 接口等关键事件
+        import logging as _logging
+        if not _logging.getLogger().handlers:
+            _logging.basicConfig(
+                level=_logging.INFO,
+                format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+                datefmt="%H:%M:%S",
+            )
         # root = tk.Tk()
         root = ttk.Window(themename="yeti")
         app = PQAutomationApp(root)