fix: 质量修复 — ESLint 规则 TS6 兼容 + catch 注解 + 空函数体注释化 + 后端架构对齐 + 前端红线修复

- enforce-catch-type: 增加 TSUnknownKeyword 判断，消除28个 TS6 假阳性
- no-empty-function: 统一为注释方案，移除测试/生产分支和 eslint-disable 引导
- logger.ts: 空函数体改为注释说明，删除无用 eslint-disable 指令
- 补充15处 catch 子句 : unknown 类型注解
- 清理7个测试文件失效 eslint-disable 指令
- chat/send.ts: 提取 getModelWithProvider DAO，消除直接 Drizzle 操作
- projects/update.ts: 修复死代码+条件逻辑 bug
- providers/update.ts: 补充至少一个字段校验
- 前端: inline style → CSS className, ProviderFormModal whitespace 校验
- 开发文档: 更新 Zod 使用说明（AI SDK 框架级约束）

src/server/db/index.ts

@@ -11,4 +11,13 @@ export {
 } from "./conversations";
 export { loadMigrationsFromDir, type MigrationRecord } from "./load-migrations";
 export { runMigrations } from "./migrate";
+export {
+  createModel,
+  deleteModel,
+  getModel,
+  getModelsByProviderId,
+  getModelWithProvider,
+  listModels,
+  updateModel,
+} from "./models";
 export { conversations, messages, projects, schemaMigrations } from "./schema";

src/server/db/models.ts

@@ -90,6 +90,38 @@ export function getModelsByProviderId(raw: Database, providerId: string): number
   return Number(result?.count ?? 0);
 }
 
+export function getModelWithProvider(
+  raw: Database,
+  modelId: string,
+):
+  | { error: string; status: number }
+  | {
+      model: { modelId: string; name: string; providerId: string };
+      provider: { apiKey: string; baseUrl: string; id: string; type: string };
+    } {
+  const db = wrap(raw);
+  const row = db.select().from(models).where(eq(models.id, modelId)).get();
+
+  if (!row) return { error: "模型不存在", status: 404 };
+
+  const providerRow = db.select().from(providers).where(eq(providers.id, row.providerId)).get();
+  if (!providerRow) return { error: "供应商不存在", status: 404 };
+
+  return {
+    model: {
+      modelId: row.modelId,
+      name: row.name,
+      providerId: row.providerId,
+    },
+    provider: {
+      apiKey: providerRow.apiKey,
+      baseUrl: providerRow.baseUrl,
+      id: providerRow.id,
+      type: providerRow.type,
+    },
+  };
+}
+
 export function listModels(
   raw: Database,
   options: { keyword?: string; page: number; pageSize: number; providerId?: string },