feat(qt): bounded selection auto-scroll across history

.github/workflows/qt-cpp.yml

@@ -49,7 +49,7 @@ jobs:
             "-DTERMFORGE_CONPTY_BACKEND_DIR=$dependencyRoot/conpty" `
             "-DTERMFORGE_MSVC_RUNTIME_DIR=$dependencyRoot/crt"
       - name: Build Qt product and independent smoke
-        run: cmake --build build/qt-cpp --config Release --target termforge_qt_shell qt_cpp_shell_smoke qt_cpp_resize_smoke qt_unicode_input_test qt_unicode_render_test qt_eight_session_test qt_terminal_modes_test qt_hidden_retention_test qt_history_navigation_test qt_selection_migration_test qt_find_test qt_scrollbar_size_test qt_clipboard_system_test qt_query_reply_test qt_paste_test --parallel 2
+        run: cmake --build build/qt-cpp --config Release --target termforge_qt_shell qt_cpp_shell_smoke qt_cpp_resize_smoke qt_unicode_input_test qt_unicode_render_test qt_eight_session_test qt_terminal_modes_test qt_hidden_retention_test qt_history_navigation_test qt_selection_migration_test qt_find_test qt_scrollbar_size_test qt_autoscroll_test qt_clipboard_system_test qt_query_reply_test qt_paste_test --parallel 2
       - name: Stage the frozen Qt product and verify every file identity
         run: |
           python -m tools.stage_qt_product stage `
@@ -100,6 +100,8 @@ jobs:
           if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
           python tools/msvc_runtime.py manifest --directory build/qt-cpp/qt-scrollbar-size-bin/Release --executable qt_scrollbar_size_test.exe
           if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+          python tools/msvc_runtime.py manifest --directory build/qt-cpp/qt-autoscroll-bin/Release --executable qt_autoscroll_test.exe
+          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
           python tools/msvc_runtime.py manifest --directory build/qt-cpp/qt-clipboard-bin/Release --executable qt_clipboard_system_test.exe
           if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
           python tools/msvc_runtime.py manifest --directory build/qt-cpp/qt-query-reply-bin/Release --executable qt_query_reply_test.exe
@@ -127,7 +129,7 @@ jobs:
             build/qt-cpp/qt-query-reply-bin/Release/runtime-manifest.json
             build/qt-cpp/qt-paste-bin/Release/runtime-manifest.json
       - name: Run Qt offscreen smoke in its owned Job
-        run: ctest --test-dir build/qt-cpp -C Release -R '^(qt_cpp_(shell|resize)|qt_unicode_input|qt_unicode_render|qt_eight_session|qt_terminal_modes(_retained)?|qt_hidden_retention|qt_history_navigation|qt_selection_migration|qt_find|qt_scrollbar_size|qt_query_reply|qt_paste)$' --no-tests=error --verbose
+        run: ctest --test-dir build/qt-cpp -C Release -R '^(qt_cpp_(shell|resize)|qt_unicode_input|qt_unicode_render|qt_eight_session|qt_terminal_modes(_retained)?|qt_hidden_retention|qt_history_navigation|qt_selection_migration|qt_find|qt_scrollbar_size|qt_autoscroll|qt_query_reply|qt_paste)$' --no-tests=error --verbose
       - name: Run hosted-only Qt system clipboard copy
         run: python src/qt/run_smoke.py build/qt-cpp/qt-clipboard-bin/Release/qt_clipboard_system_test.exe --hosted-copy
       - name: Run hosted Windows QPA product-writer clipboard copy

CMakeLists.txt

@@ -873,6 +873,35 @@ if(TERMFORGE_BUILD_QT_SHELL)
       "${PROJECT_SOURCE_DIR}/src/qt/run_smoke.py" "$<TARGET_FILE:qt_find_test>")
     set_tests_properties(qt_find PROPERTIES TIMEOUT 45
       ENVIRONMENT "QT_QPA_PLATFORM=offscreen")
+    add_executable(qt_autoscroll_test src/qt/autoscroll_test.cpp)
+    set_target_properties(qt_autoscroll_test PROPERTIES
+      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/qt-autoscroll-bin/$<CONFIG>")
+    termforge_qt_entry(qt_autoscroll_test)
+    target_link_libraries(qt_autoscroll_test PRIVATE Qt6::Test)
+    add_custom_command(TARGET qt_autoscroll_test POST_BUILD
+      COMMAND "${CMAKE_COMMAND}" -E copy_if_different
+        "$<TARGET_FILE:Qt6::QOffscreenIntegrationPlugin>"
+        "$<TARGET_FILE_DIR:qt_autoscroll_test>/platforms/"
+      VERBATIM)
+    add_test(NAME qt_autoscroll COMMAND "${Python3_EXECUTABLE}"
+      "${PROJECT_SOURCE_DIR}/src/qt/run_smoke.py" "$<TARGET_FILE:qt_autoscroll_test>")
+    set_tests_properties(qt_autoscroll PROPERTIES TIMEOUT 45
+      ENVIRONMENT "QT_QPA_PLATFORM=offscreen")
+    # Opt-in single-run literal oracle for the #327 recovery protocol v2. It is
+    # built on demand but deliberately NOT registered with add_test(): the
+    # literal run consumes a separately authorized one-shot budget, so CTest,
+    # push and PR runs must never execute it. Invoke it manually through
+    # run_smoke.py with --literal-v2 and an evidence path.
+    add_executable(qt_autoscroll_literal_test src/qt/autoscroll_literal_test.cpp)
+    set_target_properties(qt_autoscroll_literal_test PROPERTIES
+      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/qt-autoscroll-literal-bin/$<CONFIG>")
+    termforge_qt_entry(qt_autoscroll_literal_test)
+    target_link_libraries(qt_autoscroll_literal_test PRIVATE Qt6::Test)
+    add_custom_command(TARGET qt_autoscroll_literal_test POST_BUILD
+      COMMAND "${CMAKE_COMMAND}" -E copy_if_different
+        "$<TARGET_FILE:Qt6::QOffscreenIntegrationPlugin>"
+        "$<TARGET_FILE_DIR:qt_autoscroll_literal_test>/platforms/"
+      VERBATIM)
     add_executable(qt_scrollbar_size_test src/qt/scrollbar_size_test.cpp)
     set_target_properties(qt_scrollbar_size_test PROPERTIES
       RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/qt-scrollbar-size-bin/$<CONFIG>")

docs/EVIDENCE.md

@@ -24,6 +24,7 @@
 | Qt 正式路径恢复 Windows 原生滚轮设置（#29 收尾） | [原生合同、注入回归与边界](../experiments/shell/results/2026-11-05-qt-wheel-native/README.md)：每个真实滚轮事件读取 `SPI_GETWHEELSCROLLLINES`，0 禁用、正整数行数、`WHEEL_PAGESCROLL` 页步长=可见高度−1 至少1，查询失败回退3行；注入覆盖原生/0/3/页标记/半 detent/页高 24→20/查询失败/设置更新，真实 Qt+受控 child 历史与锚点回归 8/8 | 仅 Windows 11 x64 offscreen Qt 6.10.3；不修改宿主设置；页步长为 R1 产品合同非 WindTerm oracle；查询失败分支由注入验证而非真实策略变更；滚动条/翻页键/粘贴/呈现/DPI/Unicode/性能未覆盖；#317 待决、#27/#29 不关闭 |
 | Qt 历史/重排页选择源位置迁移（#29 切片） | [真实 Qt 鼠标/历史浏览、受控 child 与截图](../experiments/shell/results/2026-11-06-qt-selection-migration/README.md)：反向跨软续行、部分列+硬行边界、60×20 重排/恢复、浏览页变化、无关输出、真实淘汰/ED3/RIS 失效、双会话隔离；字面文本与高亮列数独立核对，Qt 正式路径 9/9 | 单屏 offscreen、固定短 ASCII/单一软续行；宽字/结合字选择列、系统剪贴板/复制 UI、粘贴、选词选行、自动滚动、Find、物理呈现/DPI/其他尺寸/性能未覆盖；内部提取≠系统剪贴板；旧失败/A/B/C/#27/#29 状态不变 |
 | Qt 历史滚动条与源阅读锚点（#29 切片） | [实现、真实鼠标/键盘与截图](../experiments/shell/results/2026-11-07-qt-history-scrollbar/README.md)：真实 QScrollBar 拖动/页区/Home/End，值仅显示页 top，经 HistoryViewport 源锚点定位；覆盖新输出锚点、回底、缩窄恢复、Find 同步、双会话；Qt 正式路径 10/10 | 离屏 Qt；不覆盖物理呈现/DPI、TUI/备用屏、自动滚动/选词选行/持久化/性能；滚动条+child 尺寸独立 ACK 仍为边界；不代表 #29/#30/R2 完成 |
+| Qt 跨历史拖选有界自动滚动（#29 切片） | [实现、策略映射与真实 child 结果](../experiments/shell/results/2026-11-07-qt-selection-autoscroll/README.md)：指针拖出可见上/下边缘时每 tick 滚动 1 源行并扩展选区；拖回/松开/失焦/隐藏/resize/关闭停止；高亮/Copy/滚动条同源；双会话隔离；本地 Qt 12/12 | 离屏；Copy 为注入 writer 非真实 CF；不含选词/选行/矩形/TUI/持久化/性能阈值；不关闭 #29/#30/R2 |
 | Qt 有界系统复制入口（#29/#30 切片） | [实现、fake 入口回归与 hosted 阻塞](../experiments/shell/results/2026-11-06-qt-system-copy/README.md)：Ctrl+Shift+C/实际 Copy 菜单接入 CF_UNICODETEXT，空/失效/容量/失败分列；本地 fake writer 入口测试通过，Qt 正式路径 9/9；hosted-only CF 入口通过（QPA/offscreen 分层） | **系统 CF 已在一次性 GitHub-hosted Windows run `42160062253` 分层验证**：offscreen 注入 owner 与 Windows QPA 默认 writer/真实控件 HWND 均独立读回键盘/实际菜单/空 sentinel/占用失败/释放后成功/淘汰；首次 offscreen winId 非 HWND 的 `OpenClipboard:1400` 只修正测试 owner，不改产品；宽字/结合字复制列、占用重试、粘贴、Find、物理呈现/性能未覆盖；不把 offscreen 缓存当 CF；旧 B/CD/A/B/C/#27/#29/#30 状态不变 |
 | Qt 有界系统粘贴入口（#29/#30 切片） | [实现、本地 child 字节回归与 hosted Windows QPA CF](../experiments/shell/results/2026-11-06-qt-system-paste/README.md)：Ctrl+Shift+V/Shift+Insert/实际 Paste 菜单接默认 CF 读取器、分块发送、目标绑定、多行确认；本地 fake reader + 真实 child 1/1、Qt 10/10（含双会话切换/读取中关闭/新会话隔离）；hosted Windows QPA run `42183487961`/job `127778260596` 三入口/真实占用失败/释放后成功通过 | hosted 多行确认保留为历史失败（首次 `eecf21f`、修复后 `5ea8e44` 均未收到 `L1\rL2`；恢复额度已用尽，未再 hosted 重试，见[尝试账本](../experiments/shell/results/2026-11-06-qt-system-paste/attempt-ledger.md)）；不覆盖 bracketed paste/TUI/自动逐行/Find/物理呈现/DPI/性能；系统 CF 仅该一次性 hosted 运行；#27/#29/#30/#35/#7 不关闭 |
 | Qt 有界字面量 Find（#29 切片） | [实现、本地确定性 child 与截图](../experiments/shell/results/2026-11-06-qt-find/README.md)：Ctrl+Shift+F/查询/Previous/Next/Close，复用 TextSearch 的 4096 字节/1024 结果/字面量/ASCII case folding；源位置经 ViewMapping 在正常主屏与历史页高亮导航；本地 Qt 正式路径 10/10（qt_find 1/1） | 固定 ASCII 样例、离屏 Qt；中文/NFD 只声明字面标量匹配，不宣称字素/glyph 等价；不含选词/选行、滚动条/翻页键历史、TUI/备用屏 Find、物理呈现/DPI/性能阈值；不代表 #29/#30/R2 完成 |