feat(db): 待处理新增「下载器连不上」「下载目录读不到容量」两类（迁移 0073）

decision.kind 增加 downloader_offline / cache_volume_unknown,契约、原因文案与界面标签同步;
volume_state_unknown 的原因文案改为「下载目录读不到容量」并指向路径映射与容器挂载。

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

packages/contracts/src/agent.ts

@@ -149,6 +149,10 @@ export const DecisionKind = z.enum([
   "identity_unresolved",
   /** 资源已绑定作品但集数待确认(无法换算 / 映射规则失效):按作品 + 来源季 + 发布组合并,附建议规则 */
   "episode_mapping",
+  /** 下载器连续不可达超过一段时间(按实例去重,恢复后自动关闭) */
+  "downloader_offline",
+  /** 下载目录读不到容量(路径映射 / 挂载问题,按卷去重,恢复后自动关闭) */
+  "cache_volume_unknown",
 ]);
 export type DecisionKind = z.infer<typeof DecisionKind>;
 export const DecisionStatus = z.enum(["open", "investigating", "awaiting_user", "resolved", "dismissed", "expired"]);

packages/contracts/src/reasons.ts

@@ -66,7 +66,7 @@ const REASONS: Record<string, ReasonText> = {
   not_found: { text: "没找到" },
   precondition: { text: "前置条件不满足" },
   internal: { text: "内部错误" },
-  volume_state_unknown: { text: "下载盘用量未知", action: "在下载面板检查下载盘" },
+  volume_state_unknown: { text: "下载目录读不到容量", action: "检查下载器的路径映射和容器挂载" },
   hard_threshold_reached: { text: "下载盘已到暂停线" },
   projected_over_threshold: { text: "下完会超过下载盘暂停线" },
   awaiting_resume_watermark: { text: "等下载盘降到恢复线" },
@@ -85,6 +85,8 @@ const REASONS: Record<string, ReasonText> = {
   download_failed: { text: "下载失败" },
   download_stalled: { text: "下载无进展" },
   space_insufficient: { text: "空间不足" },
+  downloader_offline: { text: "下载器连不上" },
+  cache_volume_unknown: { text: "下载目录读不到容量" },
   unidentifiable: { text: "没识别出作品" },
   user_deleted: { text: "已删除" },
   // DL-3:还没提交就结束或在等的下载(计划的 statusReason、提交任务的延后原因)

packages/db/migrations/0073_downloader_visibility.ts

@@ -0,0 +1,40 @@
+import type { Kysely } from "kysely";
+import { execDdl, oneOf } from "../src/migration-helpers.ts";
+
+// 下载侧可见性:decision.kind 增加
+// - downloader_offline:下载器连续不可达超过一段时间(按实例去重,恢复后自动关闭)
+// - cache_volume_unknown:下载目录读不到容量(路径映射 / 挂载问题,按卷去重,恢复后自动关闭)
+
+const OLD_DECISION_KINDS = [
+  "identity_ambiguous",
+  "download_stalled",
+  "download_failed",
+  "path_conflict",
+  "space_insufficient",
+  "approval_required",
+  "metadata_conflict",
+  "source_unreachable",
+  "other",
+  "identity_unresolved",
+  "episode_mapping",
+];
+const NEW_DECISION_KINDS = [...OLD_DECISION_KINDS, "downloader_offline", "cache_volume_unknown"];
+
+const swapDecisionKinds = (values: readonly string[]) => `
+alter table decision drop constraint decision_kind_check;
+alter table decision add constraint decision_kind_check ${oneOf("kind", values)};
+`;
+
+// biome-ignore lint/suspicious/noExplicitAny: 迁移不依赖应用表类型
+export async function up(db: Kysely<any>): Promise<void> {
+  await execDdl(db, swapDecisionKinds(NEW_DECISION_KINDS));
+}
+
+// biome-ignore lint/suspicious/noExplicitAny: 同上
+export async function down(db: Kysely<any>): Promise<void> {
+  await execDdl(
+    db,
+    `update decision set kind = 'other' where kind in ('downloader_offline', 'cache_volume_unknown');
+     ${swapDecisionKinds(OLD_DECISION_KINDS)}`,
+  );
+}

packages/db/src/types.ts

@@ -112,7 +112,9 @@ export type DecisionKind =
   | "source_unreachable"
   | "other"
   | "identity_unresolved"
-  | "episode_mapping";
+  | "episode_mapping"
+  | "downloader_offline"
+  | "cache_volume_unknown";
 export type DecisionStatus = "open" | "investigating" | "awaiting_user" | "resolved" | "dismissed" | "expired";
 export type DecisionSeverity = "info" | "warning" | "critical";
 export type DownloadTaskOrigin = "submitted" | "adopted";