refactor: 统一 target name/description 可空语义，前端展示 fallback 到 id

- schema: name/description 允许省略或显式 null，TypeBox Union([Null, String])
- 类型: RawTargetConfig/ResolvedTargetBase/子类型/StoredTarget/TargetStatus name 改为 string | null
- checker resolve: name: t.name ?? null，不再 fallback 到 id
- 语义校验: 拒绝空字符串和纯空白 name
- SQLite: targets.name 列改为可空 TEXT
- 前端: 新增 getTargetDisplayName(target) 展示 name ?? id
- 测试: 覆盖 name/description null 全场景，查找改为按 id
- 文档: 更新 README/DEVELOPMENT 和 6 个 openspec specs

src/server/checker/config-loader.ts

@@ -179,6 +179,10 @@ function validateConfig(config: RawProbeConfig): ConfigValidationIssue[] {
     const nameValue: unknown = raw["name"];
     const name = isString(nameValue) ? nameValue : id;
 
+    if (isString(nameValue) && nameValue.trim() === "") {
+      issues.push(issue("invalid-value", `targets[${i}].name`, "name 不能为空白", name));
+    }
+
     const type: unknown = raw["type"];
     if (!isString(type)) {
       issues.push(issue("required", `targets[${i}].type`, "缺少 type 字段", name));

src/server/checker/runner/cmd/execute.ts

@@ -192,7 +192,7 @@ export class CommandChecker implements CheckerDefinition<ResolvedCommandTarget>
       group: target.group ?? "default",
       id: t.id,
       intervalMs: context.defaultIntervalMs,
-      name: t.name ?? t.id,
+      name: t.name ?? null,
       timeoutMs: context.defaultTimeoutMs,
       type: "cmd",
     } satisfies ResolvedCommandTarget;

src/server/checker/runner/cmd/types.ts

@@ -33,7 +33,7 @@ export interface ResolvedCommandTarget extends ResolvedTargetBase {
   expect?: CommandExpectConfig;
   group: string;
   intervalMs: number;
-  name: string;
+  name: null | string;
   timeoutMs: number;
   type: "cmd";
 }

src/server/checker/runner/db/execute.ts

@@ -185,7 +185,7 @@ export class DbChecker implements CheckerDefinition<ResolvedDbTarget> {
       group: target.group ?? "default",
       id: t.id,
       intervalMs: context.defaultIntervalMs,
-      name: t.name ?? t.id,
+      name: t.name ?? null,
       timeoutMs: context.defaultTimeoutMs,
       type: "db",
     } satisfies ResolvedDbTarget;

src/server/checker/runner/db/types.ts

@@ -21,7 +21,7 @@ export interface ResolvedDbTarget extends ResolvedTargetBase {
   expect?: DbExpectConfig;
   group: string;
   intervalMs: number;
-  name: string;
+  name: null | string;
   timeoutMs: number;
   type: "db";
 }

src/server/checker/runner/http/execute.ts

@@ -126,7 +126,7 @@ export class HttpChecker implements CheckerDefinition<ResolvedHttpTarget> {
       },
       id: t.id,
       intervalMs: context.defaultIntervalMs,
-      name: t.name ?? t.id,
+      name: t.name ?? null,
       timeoutMs: context.defaultTimeoutMs,
       type: "http",
     } satisfies ResolvedHttpTarget;

src/server/checker/runner/http/types.ts

@@ -51,7 +51,7 @@ export interface ResolvedHttpTarget extends ResolvedTargetBase {
   group: string;
   http: ResolvedHttpConfig;
   intervalMs: number;
-  name: string;
+  name: null | string;
   timeoutMs: number;
   type: "http";
 }

src/server/checker/schema/builder.ts

@@ -49,12 +49,12 @@ export function createProbeConfigSchema(checkers: CheckerDefinition[], external
 
 export function createTargetSchema(checker: CheckerDefinition): TSchema {
   const properties: Record<string, TSchema> = {
-    description: Type.Optional(Type.String({ maxLength: 500 })),
+    description: Type.Optional(Type.Union([Type.Null(), Type.String({ maxLength: 500 })])),
     expect: Type.Optional(checker.schemas.expect),
     group: Type.Optional(Type.String()),
     id: Type.String({ maxLength: 30, minLength: 1 }),
     interval: Type.Optional(durationSchema),
-    name: Type.Optional(Type.String({ maxLength: 30, minLength: 1 })),
+    name: Type.Optional(Type.Union([Type.Null(), Type.String({ maxLength: 30, minLength: 1 })])),
     timeout: Type.Optional(durationSchema),
     type: Type.Literal(checker.type),
   };
@@ -69,11 +69,11 @@ function cloneSchema(schema: TSchema): Record<string, unknown> {
 function createBaseTargetSchema(checkers: CheckerDefinition[]): TSchema {
   return Type.Object(
     {
-      description: Type.Optional(Type.String({ maxLength: 500 })),
+      description: Type.Optional(Type.Union([Type.Null(), Type.String({ maxLength: 500 })])),
       group: Type.Optional(Type.String()),
       id: Type.String({ maxLength: 30, minLength: 1 }),
       interval: Type.Optional(durationSchema),
-      name: Type.Optional(Type.String({ maxLength: 30, minLength: 1 })),
+      name: Type.Optional(Type.Union([Type.Null(), Type.String({ maxLength: 30, minLength: 1 })])),
       timeout: Type.Optional(durationSchema),
       type: Type.Union(checkers.map((checker) => Type.Literal(checker.type)) as unknown as [TSchema, ...TSchema[]]),
     },

src/server/checker/store.ts

@@ -9,7 +9,7 @@ import { checkerRegistry } from "./runner";
 const CREATE_TARGETS_TABLE = `
 CREATE TABLE IF NOT EXISTS targets (
   id TEXT PRIMARY KEY,
-  name TEXT NOT NULL,
+  name TEXT,
   description TEXT,
   type TEXT NOT NULL,
   target TEXT NOT NULL,
@@ -309,10 +309,7 @@ export class ProbeStore {
 
   syncTargets(targets: ResolvedTargetBase[]): void {
     if (this.closed) return;
-    const existingRows = this.db.query("SELECT id FROM targets").all() as Array<{
-      id: string;
-      name: string;
-    }>;
+    const existingRows = this.db.query("SELECT id FROM targets").all() as Array<{ id: string }>;
     const existingIds = new Set(existingRows.map((r) => r.id));
     const configIds = new Set(targets.map((t) => t.id));
 

src/server/checker/types.ts

@@ -41,12 +41,12 @@ export interface ProbeConfig {
 
 export interface RawTargetConfig {
   [configKey: string]: unknown;
-  description?: string;
+  description?: null | string;
   expect?: unknown;
   group?: string;
   id: string;
   interval?: string;
-  name?: string;
+  name?: null | string;
   timeout?: string;
   type: string;
 }
@@ -58,7 +58,7 @@ export interface ResolvedTargetBase {
   group: string;
   id: string;
   intervalMs: number;
-  name: string;
+  name: null | string;
   timeoutMs: number;
   type: string;
 }
@@ -86,7 +86,7 @@ export interface StoredTarget {
   grp: string;
   id: string;
   interval_ms: number;
-  name: string;
+  name: null | string;
   target: string;
   timeout_ms: number;
   type: string;