fix: make Host environment updates fast and recoverable

Published Host updates could fail while the desktop reverified Runtime against
its bundled lock and repeatedly traversed remote payloads. Host preparation now
verifies and extracts once, adopts Agent and Runtime on one pinned connection,
and uses registered metadata for normal health, capability, and prompt paths.
Interrupted commits and adoption retain bounded recovery and rollback state.

Desktop and Agent versions are 0.11.8. Remote Projects remain a technical
preview; the Agent targets Linux x64 and arm64, with no LoongArch preview.

Release note: 修复正式环境 Host 更新失败并移除重复远端包体扫描；中断恢复与清理失败不再破坏已健康环境。

src/main/ssh/ssh-remote-package-bootstrap.ts

@@ -46,9 +46,9 @@ const progressPhases = [
   "verifying-payload",
   "persisting-prepared-state",
   "validating-prepared-state",
-  "revalidating-archive",
   "extracting-payload",
   "publishing-content",
+  "publishing-metadata",
 ] as const;
 
 const unavailableReasons = [
@@ -166,6 +166,7 @@ export type SshRemotePackageBootstrapPrepareResult =
       prepared: false;
       unavailable: false;
       reason: SshRemotePackageBootstrapFailureReason;
+      detail?: string;
     };
 
 export type SshRemotePackageUploadStagingResult =
@@ -195,6 +196,7 @@ export type SshRemotePackageBootstrapCommitResult =
   | {
       committed: false;
       reason: SshRemotePackageBootstrapFailureReason;
+      detail?: string;
     };
 
 export type SshRemotePackageBootstrapCleanupResult =
@@ -268,6 +270,7 @@ type TerminalMessage =
       type: "result";
       status: "failed";
       reason: SshRemotePackageBootstrapFailureReason;
+      detail?: string;
     }
   | {
       type: "result";
@@ -467,23 +470,29 @@ if [ "$action" = prepare-status ]; then
 fi
 if [ "$action" = commit-status ]; then
   installer_output="$operation_root/installer-commit.ndjson"
-  if [ ! -d "$operation_root" ] || [ -L "$operation_root" ] ||
-     [ ! -f "$installer_output" ] || [ -L "$installer_output" ]; then
-    stop failed operation-unavailable
+  if [ -d "$operation_root" ] && [ ! -L "$operation_root" ] &&
+     [ -f "$installer_output" ] && [ ! -L "$installer_output" ]; then
+    installer_output_size=$(wc -c < "$installer_output" 2>/dev/null) ||
+      stop failed operation-unavailable
+    set -- $installer_output_size
+    installer_output_size=${SHELL_FIRST_POSITIONAL_OR_EMPTY}
+    case "$installer_output_size" in
+      ""|*[!0-9]*) stop failed operation-unavailable ;;
+    esac
+    [ "$installer_output_size" -le 49152 ] ||
+      stop failed operation-unavailable
+    terminal_line=$(tail -n 1 "$installer_output" 2>/dev/null) ||
+      stop failed operation-unavailable
+    if printf %s "$terminal_line" | grep '"type":"result"' >/dev/null 2>&1 ||
+       printf %s "$terminal_line" | grep '"type":"error"' >/dev/null 2>&1; then
+      cat -- "$installer_output" || stop failed operation-unavailable
+      exit 0
+    fi
   fi
-  installer_output_size=$(wc -c < "$installer_output" 2>/dev/null) ||
-    stop failed operation-unavailable
-  set -- $installer_output_size
-  installer_output_size=${SHELL_FIRST_POSITIONAL_OR_EMPTY}
-  case "$installer_output_size" in
-    ""|*[!0-9]*) stop failed operation-unavailable ;;
-  esac
-  [ "$installer_output_size" -gt 0 ] ||
-    stop failed operation-unavailable
-  [ "$installer_output_size" -le 49152 ] ||
-    stop failed operation-unavailable
-  cat -- "$installer_output" || stop failed operation-unavailable
-  exit 0
+  # A process or channel loss may leave a partial publication without a
+  # terminal line. The installer commit is idempotent and completes it from
+  # the authenticated prepared state.
+  action=commit
 fi
 if [ "$action" = commit ]; then
   if [ ! -d "$operation_root" ] || [ -L "$operation_root" ] ||
@@ -1109,6 +1118,7 @@ function parseMessage(
           message.status === "rollback-incomplete"
             ? "installer-rollback-incomplete"
             : "installer-failed",
+        detail: message.message,
       },
     };
   }
@@ -1444,6 +1454,9 @@ export function createSshRemotePackageBootstrapExecutor(
         prepared: false,
         unavailable: false,
         reason: result.reason,
+        ...(result.detail === undefined
+          ? {}
+          : { detail: result.detail }),
       };
     }
     throw new Error("Agent 远程安装准备返回了无效结果");
@@ -1473,7 +1486,13 @@ export function createSshRemotePackageBootstrapExecutor(
       };
     }
     if (result.status === "failed") {
-      return { committed: false, reason: result.reason };
+      return {
+        committed: false,
+        reason: result.reason,
+        ...(result.detail === undefined
+          ? {}
+          : { detail: result.detail }),
+      };
     }
     throw new Error("Agent 远程安装提交状态返回了无效结果");
   };
@@ -1582,7 +1601,13 @@ export function createSshRemotePackageBootstrapExecutor(
         };
       }
       if (result.status === "failed") {
-        return { committed: false, reason: result.reason };
+        return {
+          committed: false,
+          reason: result.reason,
+          ...(result.detail === undefined
+            ? {}
+            : { detail: result.detail }),
+        };
       }
       throw new Error("Agent 远程安装提交返回了无效结果");
     },