refactor(sidebar): drop company name from delete-confirm prompt

"删除 OrbitOps AI？" was being truncated to "删除O..." inside the
~100px inline confirm row, because the row has to share width with
the 是 / 否 buttons. The name-interpolation was the wrong half of
the message to keep: the user has just clicked the trash icon on a
specific row, so **which** company is about to be deleted is
already anchored by the row they are looking at. The bare
confirmation "删除？" / "Delete?" fits comfortably and loses zero
information.

- zh key: "删除{name}？" → "删除？"
- en key: "Delete {name}?" → "Delete?"
- Removed the `.replace("{name}", company.name)` call and the
  fallback string that also interpolated `company.name`.

No visual change to the 是 / 否 buttons; the confirm still blocks
the row, still requires an explicit click. The only thing gone is
the truncated company-name echo.

src/renderer/i18n/en.ts

@@ -288,7 +288,7 @@ export const en: Record<string, string> = {
   "common.close": "Close",
   "common.yes": "Yes",
   "common.no": "No",
-  "sidebar.deleteCompanyConfirm": "Delete {name}?",
+  "sidebar.deleteCompanyConfirm": "Delete?",
   "common.confirm": "Confirm",
   "common.status": "Status",
   "common.started": "Started",

src/renderer/i18n/zh.ts

@@ -288,7 +288,7 @@ export const zh: Record<string, string> = {
   "common.close": "关闭",
   "common.yes": "是",
   "common.no": "否",
-  "sidebar.deleteCompanyConfirm": "删除{name}？",
+  "sidebar.deleteCompanyConfirm": "删除？",
   "common.confirm": "确认",
   "common.status": "状态",
   "common.started": "开始时间",