重构构建流程 + 为 refresh_history 加细粒度诊断日志

构建流程 (修复 macOS 26 上 libtiff.6.dylib 未打包闪退):
- ZB100ImageGenerator.spec 成为跨平台构建配置唯一真相源
- 显式枚举 PIL/.dylibs/.libs 下的原生库并平铺到 bundle 根目录,
  匹配 PyInstaller 把 _imaging.so 的 @rpath 改写成 @loader_path/..
  (= Contents/Frameworks/) 的预期位置
- build_mac_universal.sh / build_windows.bat 不再删除 *.spec,
  调用简化为 `pyinstaller ZB100ImageGenerator.spec`
- 旧的 --collect-all PIL 方案保留了 .dylibs/ 目录结构, 跟 rpath
  预期位置不匹配, 治标不治本

诊断日志 (定位 refresh_history 的 SIGKILL 位置):
- 新增 _flush_logs() 模块级工具, 在可疑阶段边界强制刷盘
- load_history_index: 每 20 条打一次路径修正进度
- refresh_history: clear/load/loop 三段独立计时, 每 20 条打渲染进度
- 下次 macOS 卡死被 SIGKILL 时能精确定位死亡行

昨天 138ec9fa 的 thumb.jpg 缓存挡住了内存压力型 SIGKILL, 但今天
115 条时 refresh_history 仍卡 8 秒后被 WindowServer 强杀 (日志
只打了 "开始刷新" 就再无输出). 真正的架构修复 (取消 clear+rebuild
全量重绘) 留待下次定位清楚后再做.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

 # -*- mode: python ; coding: utf-8 -*-
+"""
+PyInstaller spec for ZB100ImageGenerator.
 
+跨平台构建配置的唯一真相源 (macOS + Windows)。
+build_mac_universal.sh / build_windows.bat 只负责环境准备，
+实际构建调用 `pyinstaller ZB100ImageGenerator.spec`。
+
+修复点：
+- macOS 上 PIL/_imaging.so 依赖 @rpath/libtiff.6.dylib 等原生库，
+  PyInstaller 会把 @rpath 改写为 @loader_path/.. (= Contents/Frameworks/)，
+  因此 .dylibs/*.dylib 必须平铺到 bundle 根目录，而不是保留
+  PIL/.dylibs/ 结构 —— 否则 dlopen 在启动时失败。
+"""
+import sys
+from pathlib import Path
+
+IS_MAC = sys.platform == 'darwin'
+IS_WIN = sys.platform == 'win32'
+
+# ----- 图标 -----
+if IS_MAC:
+    ICON = 'zb100_mac.icns'
+elif IS_WIN:
+    ICON = 'zb100_windows.ico'
+else:
+    ICON = None
+
+# ----- 数据文件 -----
+datas = [('config.json', '.')]
+if IS_WIN:
+    datas.append(('zb100_windows.ico', '.'))
+
+# ----- Pillow 原生库：平铺到 bundle 根 -----
+pil_native_libs = []
+try:
+    import PIL
+    pil_dir = Path(PIL.__file__).parent
+    for sub in ('.dylibs', '.libs'):
+        d = pil_dir / sub
+        if d.is_dir():
+            for lib in d.iterdir():
+                if lib.suffix.lower() in ('.dylib', '.so', '.dll'):
+                    pil_native_libs.append((str(lib), '.'))
+except Exception as e:
+    print(f'[spec] WARN 枚举 PIL 原生库失败: {e}')
+
+print(f'[spec] 将 {len(pil_native_libs)} 个 PIL 原生库平铺到 bundle 根目录')
 
 a = Analysis(
     ['image_generator.py'],
     pathex=[],
-    binaries=[],
-    datas=[('config.json', '.')],
+    binaries=pil_native_libs,
+    datas=datas,
     hiddenimports=[],
     hookspath=[],
     hooksconfig={},
@@ -32,7 +78,7 @@ exe = EXE(
     target_arch=None,
     codesign_identity=None,
     entitlements_file=None,
-    icon=['zb100_mac.icns'],
+    icon=[ICON] if ICON else None,
 )
 coll = COLLECT(
     exe,
@@ -43,9 +89,11 @@ coll = COLLECT(
     upx_exclude=[],
     name='ZB100ImageGenerator',
 )
-app = BUNDLE(
-    coll,
-    name='ZB100ImageGenerator.app',
-    icon='zb100_mac.icns',
-    bundle_identifier=None,
-)
+
+if IS_MAC:
+    app = BUNDLE(
+        coll,
+        name='ZB100ImageGenerator.app',
+        icon=ICON,
+        bundle_identifier=None,
+    )

@@ -66,19 +66,13 @@ pip install --upgrade pip
 pip install -r requirements.txt
 pip install pyinstaller
 
-# 清理旧构建
+# 清理旧构建 (保留 spec 文件，它是构建配置的唯一真相源)
 echo "Cleaning previous builds..."
-rm -rf build dist *.spec
+rm -rf build dist
 
-# 构建
+# 构建 (所有配置都在 ZB100ImageGenerator.spec 里)
 echo "Building executable..."
-pyinstaller --name="ZB100ImageGenerator" \
-    --onedir \
-    --windowed \
-    --add-data "config.json:." \
-    --icon=zb100_mac.icns \
-    --collect-all PIL \
-    image_generator.py
+pyinstaller ZB100ImageGenerator.spec
 
 # 验证构建结果
 if [ -d "dist/ZB100ImageGenerator.app" ]; then

@@ -20,22 +20,14 @@ echo Installing dependencies...
 pip install --upgrade pip
 pip install -r requirements.txt
 
-REM Clean previous builds
+REM Clean previous builds (keep spec file - it's the single source of truth)
 echo Cleaning previous builds...
 if exist "build" rd /s /q build
 if exist "dist" rd /s /q dist
-if exist "*.spec" del /q *.spec
 
-REM Build executable
+REM Build executable (all config lives in ZB100ImageGenerator.spec)
 echo Building executable...
-pyinstaller --name="ZB100ImageGenerator" ^
-    --onedir ^
-    --windowed ^
-    --icon=zb100_windows.ico ^
-    --add-data "config.json;." ^
-    --add-data "zb100_windows.ico;." ^
-    --collect-all PIL ^
-    image_generator.py
+pyinstaller ZB100ImageGenerator.spec
 
 REM Check if build was successful
 if exist "dist\ZB100ImageGenerator\ZB100ImageGenerator.exe" (

@@ -41,6 +41,22 @@ from dataclasses import dataclass, asdict
 from typing import List, Optional, Dict, Any
 
 
+def _flush_logs() -> None:
+    """强制刷盘所有日志 handlers.
+
+    macOS 对 UI 线程卡顿超过阈值会 SIGKILL，缓冲区未刷盘的日志会丢失，
+    下次崩溃定位不到。在可疑阶段边界调用此函数保证日志落盘。
+    """
+    try:
+        for h in logging.getLogger().handlers:
+            try:
+                h.flush()
+            except Exception:
+                pass
+    except Exception:
+        pass
+
+
 def _cleanup_clipboard_tempfiles(max_age_hours: int = 24) -> int:
     """清理遗留的剪贴板临时文件，防止长时间运行累积到磁盘/句柄上限。
 
@@ -746,14 +762,20 @@ class HistoryManager:
             return []
 
         try:
+            self.logger.info("[load_history_index] 开始读取 index.json")
+            _flush_logs()
             with open(self.history_index_file, 'r', encoding='utf-8') as f:
                 data = json.load(f)
+            self.logger.info(f"[load_history_index] JSON 解析完成, {len(data)} 条原始数据")
+            _flush_logs()
 
             history_items = [HistoryItem.from_dict(item) for item in data]
+            total = len(history_items)
 
             # 修正可能过期的绝对路径（存储迁移后旧路径不再有效）
+            # 每条 item 对每个 path 都要 stat; 这是 UI 主线程上可能拖死的点
             needs_save = False
-            for item in history_items:
+            for idx, item in enumerate(history_items):
                 fixed_gen = self._fix_history_path(item.generated_image_path, item.timestamp)
                 if fixed_gen != item.generated_image_path:
                     item.generated_image_path = fixed_gen
@@ -767,16 +789,27 @@ class HistoryManager:
                     fixed_refs.append(fixed_ref)
                 item.reference_image_paths = fixed_refs
 
+                if (idx + 1) % 20 == 0:
+                    self.logger.info(f"[load_history_index] 路径修正进度 {idx + 1}/{total}")
+                    _flush_logs()
+
+            self.logger.info(f"[load_history_index] 路径修正完成, needs_save={needs_save}")
+            _flush_logs()
+
             # 路径修正后持久化，避免每次都修正
             if needs_save:
                 self.logger.info("检测到历史记录路径变更，已自动修正")
                 self._save_history_index(history_items)
+                _flush_logs()
 
             # 按时间戳倒序排列
             history_items.sort(key=lambda x: x.timestamp, reverse=True)
+            self.logger.info(f"[load_history_index] 返回 {total} 条")
+            _flush_logs()
             return history_items
         except Exception as e:
-            print(f"加载历史记录索引失败: {e}")
+            self.logger.error(f"加载历史记录索引失败: {e}", exc_info=True)
+            _flush_logs()
             return []
 
     def get_history_item(self, timestamp: str) -> Optional[HistoryItem]:
@@ -2913,12 +2946,24 @@ class ImageGeneratorWindow(QMainWindow):
 
     def refresh_history(self):
         """Refresh the history list"""
+        import time as _time
+        t_start = _time.monotonic()
         self.logger.info("[refresh_history] 开始刷新历史记录列表...")
+        _flush_logs()
+
+        t_clear = _time.monotonic()
         self.history_list.clear()
+        self.logger.info(f"[refresh_history] clear() 完成 ({int((_time.monotonic() - t_clear) * 1000)}ms)")
+        _flush_logs()
+
+        t_load = _time.monotonic()
         history_items = self.history_manager.load_history_index()
-        self.logger.info(f"[refresh_history] 加载到 {len(history_items)} 条历史记录")
+        total = len(history_items)
+        self.logger.info(f"[refresh_history] 加载到 {total} 条历史记录 ({int((_time.monotonic() - t_load) * 1000)}ms)")
+        _flush_logs()
 
-        for item in history_items:
+        t_loop = _time.monotonic()
+        for idx, item in enumerate(history_items):
             # Create list item with icon
             list_item = QListWidgetItem()
 
@@ -2963,14 +3008,19 @@ class ImageGeneratorWindow(QMainWindow):
             # Add to list
             self.history_list.addItem(list_item)
 
+            if (idx + 1) % 20 == 0:
+                self.logger.info(f"[refresh_history] 渲染进度 {idx + 1}/{total} ({int((_time.monotonic() - t_loop) * 1000)}ms)")
+                _flush_logs()
+
         # Update count label
-        self.history_count_label.setText(f"共 {len(history_items)} 条历史记录")
+        self.history_count_label.setText(f"共 {total} 条历史记录")
 
         # Clear details panel if no items
         if not history_items:
             self.clear_details_panel()
 
-        self.logger.info(f"[refresh_history] 刷新完成，共渲染 {len(history_items)} 条")
+        self.logger.info(f"[refresh_history] 刷新完成，共渲染 {total} 条 (总耗时 {int((_time.monotonic() - t_start) * 1000)}ms)")
+        _flush_logs()
 
     def create_placeholder_icon(self, text):
         """Create a placeholder icon with text"""