feat: 为 Gitea 添加 Hydra OIDC 登录入口

apps/gitea/README.md

@@ -44,3 +44,15 @@ API、OIDC、Git/Flux 和 runner 均已验证。第二跳按明确决定跳过
 结构，或者 release notes 指出相关 breaking migration 时，才恢复停机一致备份、分阶段
 suspend、详细日志审计和扩展验收。出现启动失败或 migration error 时也立即升级为完整
 故障流程。
+
+## Hydra 人类登录 PoC
+
+新增 `hydra` OIDC 登录源，旧 `authelia` 入口保留。Hydra 通过通用 OIDC Login/Consent
+适配器转到现有 Authelia 完成人类认证；不是 Gitea 直接验证 LDAP 或 SPIFFE。
+入口为 `https://git.ddupan.top/user/oauth2/hydra`，需 LAN/Tailscale 可达 Hydra 内网域名。
+
+新 client secret 通过 `ExternalSecret/gitea-hydra-oidc` 从 OpenBao 投射。沿用
+preferred_username、已验证邮箱与 groups；当前仍映射 gitea-admins，不在本轮切换组模型。
+先部署并验证 Hydra discovery 后再接入本配置，避免 Gitea init 因上游不可达而失败。
+
+实际登录验收与部署状态见 wiki；依赖和回退见 [Hydra README](../hydra/README.md)。

apps/gitea/gitea-values.yaml

@@ -116,6 +116,13 @@ gitea:
       scopes: openid profile email groups
       groupClaimName: groups
       adminGroup: gitea-admins
+    - name: hydra
+      provider: openidConnect
+      existingSecret: gitea-hydra-oidc
+      autoDiscoverUrl: https://hydra.ad.ddupan.top/.well-known/openid-configuration
+      scopes: openid profile email groups
+      groupClaimName: groups
+      adminGroup: gitea-admins
 
 persistence:
   size: 20Gi

apps/gitea/hydra-external-secret.yaml

@@ -0,0 +1,22 @@
+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: gitea-hydra-oidc
+  namespace: gitea
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    kind: ClusterSecretStore
+    name: openbao
+  target:
+    name: gitea-hydra-oidc
+    creationPolicy: Owner
+    template:
+      data:
+        key: gitea
+        secret: "{{ .client_secret }}"
+  data:
+    - secretKey: client_secret
+      remoteRef:
+        key: k8s/hydra
+        property: gitea_client_secret

apps/gitea/kustomization.yaml

@@ -16,3 +16,4 @@ resources:
   - helmrepository.yaml
   - helmrelease.yaml
   - httproute.yaml
+  - hydra-external-secret.yaml