优化日志切分和保留策略

apps/backend/src/config/defaults.ts

@@ -14,6 +14,7 @@ export function createDefaultRuntimeConfig(projectRoot: string): RuntimeConfig {
 
     logging: {
       level: "info",
+      retentionDays: 30,
     },
 
     database: {

apps/backend/src/config/env-overrides.test.ts

@@ -12,6 +12,7 @@ test('applyEnvOverrides maps typed environment values without mutating base conf
     PORT: '4000',
     DATA_ROOT: './tmp/backend-data',
     DATABASE_SSL: 'yes',
+    LOG_RETENTION_DAYS: '45',
     ADMIN_DEFAULT_USERS_JSON: '[{"username":"admin","password":"secret","role":"admin"}]',
     KAQUAN91_USER_ID: 'kaquan-user',
     KAQUAN91_SECRET: 'kaquan-secret',
@@ -21,6 +22,7 @@ test('applyEnvOverrides maps typed environment values without mutating base conf
   assert.equal(config.server.port, 4000)
   assert.equal(config.data.root, path.resolve('./tmp/backend-data'))
   assert.equal(config.database.ssl, true)
+  assert.equal(config.logging.retentionDays, 45)
   assert.deepEqual(config.admin.defaultUsers, [
     { username: 'admin', password: 'secret', role: 'admin' },
   ])
@@ -55,12 +57,14 @@ test('applyEnvOverrides ignores empty or invalid values', () => {
     DATABASE_SSL: 'maybe',
     ADMIN_DEFAULT_USERS_JSON: '{"username":"admin"}',
     LOG_LEVEL: '   ',
+    LOG_RETENTION_DAYS: 'not-a-number',
   })
 
   assert.equal(config.server.port, 3000)
   assert.equal(config.database.ssl, false)
   assert.deepEqual(config.admin.defaultUsers, [])
   assert.equal(config.logging.level, 'info')
+  assert.equal(config.logging.retentionDays, 30)
 })
 
 test('ENV_OVERRIDES keeps environment variable names unique', () => {
@@ -78,6 +82,7 @@ function createRuntimeConfig(): RuntimeConfig {
     },
     logging: {
       level: 'info',
+      retentionDays: 30,
     },
     database: {
       url: 'postgres://postgres:postgres@127.0.0.1:5432/order_site',

apps/backend/src/config/env-overrides.ts

@@ -31,6 +31,7 @@ export const ENV_OVERRIDES: readonly EnvOverride[] = [
   integerEnv("PORT", ["server", "port"]),
   stringEnv("DATA_ROOT", ["data", "root"], path.resolve),
   stringEnv("LOG_LEVEL", ["logging", "level"]),
+  integerEnv("LOG_RETENTION_DAYS", ["logging", "retentionDays"]),
   stringEnv("DATABASE_URL", ["database", "url"]),
   booleanEnv("DATABASE_SSL", ["database", "ssl"]),
   integerEnv("DATABASE_MAX_CONNECTIONS", ["database", "maxConnections"]),