fix(m195): 复审 r2 —— 取消的真实结局必须到达界面（三档 + 终态穿透代次）

复审 r2 P2-1：界面无条件断言「已停手并回滚：没有留下半包，也没有覆盖已有文件」，而两条路径下
这句话是假的——①取消来得太晚（落在最后一个检查点之后）时管线已经跑完，用户的同名文件被覆盖、
实例已登记；②回滚本身没做完（`rolled_back=false`）。core 一直是诚实的，是 presenter 把报告丢了：
`cancel.load()` 早退 + `cancel_pack` bump 代次后 `handle` 按代次丢弃。

按"接通真相"做（不是改软话）：

- **终态一定发出**：`import::run` 去掉 `cancel` 的无条件早退，收尾抽成 `finish`（清自建空目录 +
  无条件 `send(PackEvent::Report)`）；取消标记在管线返回后**再读一次**，作为"太晚"的唯一证据。
- **终态穿透代次**：`HostPackState::terminal_epochs` 记下 `cancel_pack` 作废的那个代次，
  `handle` 对它**只放行一条 `PackEvent::Report`**（进度事件照旧按代次丢，`fresh_cancel` 起新
  一轮时清空）。这是路径 A 的成因与修法。
- **DTO 三档**（tower 批准扩 scope）：`ImportStatusView` 加 `Cancelled`；新增
  `ImportCancelView { NotRequested, RolledBack, RollbackIncomplete, TooLate }` 挂在
  `ImportReportView::cancel` 上——已回滚 / 回滚没做完 / 取消太晚，三档各自可判。
  `PackEvent::Report` 到达时清掉 `ImportState.cancelled`（它现在只是"取消后还没有结果"的占位）。
- **界面按结局分支**：标题 `PackStatusCancelled`（已取消 — 已回滚）/ `PackCancelIncomplete`
  （已取消 — 回滚没做完）/ 取消太晚时保留真实状态标题并另起一句 `PackCancelTooLate`
  （实例会保留、同名文件可能已被覆盖）；占位的 `PackCancelled` 改成"正在停手，真实结果随后给出"。
  图标：`Close`（描边，页面对填充字形有守门）/ 回滚不完整用 `Warn`，一档都不用 `Role::Error`。

守门与变异：
- 新增路径 A 用例 `a_late_cancel_still_delivers_the_real_outcome_to_the_ui`：真管线把取消置在
  **最后一条 Commit 进度**上（之后没有检查点）⇒ core 报 `Success`/未回滚、用户的 `mods/a.jar`
  确实被覆盖；再 `cancel_pack`（代次 +1 并记终态）→ `finish` → `handle`，断言界面收到
  `status == Success` + `rolled_back == false` + `cancel == TooLate`，且同代次的进度事件仍被丢。
- 变异①：`handle` 恢复"代次不符一律丢" ⇒ 该用例红（"取消太晚时，真实结果必须到达界面"）。
- 变异②：`finish` 恢复"取消就早退" ⇒ 该用例红（另带 P2-2 那条也红）。
- app-iced 新增 `model/tests/cancel.rs`：三档标题互不相同 + 「太晚」必须有那句补充说明 +
  已回滚不许显示成「部分成功」。

验证（CARGO_TARGET_DIR=C:/Temp/ull-target/wt-194）：
`cargo test -p unlucky-core -p unlucky-presenter -p unlucky-app-iced` = 2185 passed / 0 failed；
`-p unlucky-i18n` = 31 / 0；clippy 四 crate = 0 warning / 0 error。

crates/i18n/src/catalog/content.rs

@@ -179,8 +179,17 @@ macro_rules! content_entries {
             ),
             PackReportRejectedNote => ("not supported by the client", "客户端不支持"),
             PackCancelled => (
-                "Import cancelled — it stopped and rolled back: nothing was left half-done, no existing files were overwritten.",
-                "导入已取消 —— 后台已停手并回滚：没有留下半包，也没有覆盖已有文件。"
+                "Cancel requested — the pipeline is stopping now; the real outcome follows.",
+                "已请求取消 —— 后台正在停手，真实结果随后给出。"
+            ),
+            PackStatusCancelled => ("Cancelled — rolled back", "已取消 —— 已回滚"),
+            PackCancelIncomplete => (
+                "Cancelled — rollback incomplete: the target directory may differ from before the import.",
+                "已取消 —— 回滚没做完：目标目录可能与导入前不同。"
+            ),
+            PackCancelTooLate => (
+                "The cancel arrived too late: this import already finished. The instance is kept; same-name files may already be overwritten.",
+                "取消来得太晚：这次导入已经跑完，实例会保留，同名文件可能已被覆盖。"
             ),
             PackOverwriteAction => ("Re-import, the pack wins", "以包为准重新导入"),
             PackOverwriteNote => (

crates/i18n/src/catalog/golden/tail2.rs

@@ -29,7 +29,10 @@ pub(super) const ROWS: &[(&str, &str, &str)] = &[
     ("PackReportConflicts", "Conflicts: {count}", "冲突：{count} 个"),
     ("PackReportRejected", "The client does not support these: {count}", "这些组件客户端不支持：{count} 个"),
     ("PackReportRejectedNote", "not supported by the client", "客户端不支持"),
-    ("PackCancelled", "Import cancelled — it stopped and rolled back: nothing was left half-done, no existing files were overwritten.", "导入已取消 —— 后台已停手并回滚：没有留下半包，也没有覆盖已有文件。"),
+    ("PackCancelled", "Cancel requested — the pipeline is stopping now; the real outcome follows.", "已请求取消 —— 后台正在停手，真实结果随后给出。"),
+    ("PackStatusCancelled", "Cancelled — rolled back", "已取消 —— 已回滚"),
+    ("PackCancelIncomplete", "Cancelled — rollback incomplete: the target directory may differ from before the import.", "已取消 —— 回滚没做完：目标目录可能与导入前不同。"),
+    ("PackCancelTooLate", "The cancel arrived too late: this import already finished. The instance is kept; same-name files may already be overwritten.", "取消来得太晚：这次导入已经跑完，实例会保留，同名文件可能已被覆盖。"),
     ("PackOverwriteAction", "Re-import, the pack wins", "以包为准重新导入"),
     ("PackOverwriteNote", "Keeping both (renamed) is not supported yet: for each existing file you pick either “keep” or “overwrite”.", "「两者都留（改名）」暂不支持：每个已存在的文件只能选「保留」或「覆盖」。"),
     ("PackMissingOffline", "offline import", "离线导入"),