fix(backend): 移除对已删除 ports 包的依赖

适配 main 分支的 ports 目录删除重构:
- 将 ports 包中的接口移至 service 包
- 更新 repository 层的导入路径

backend/internal/service/gemini_messages_compat_service.go

@@ -21,7 +21,6 @@ import (
 	"github.com/Wei-Shaw/sub2api/internal/model"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/geminicli"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/googleapi"
-	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 
 	"github.com/gin-gonic/gin"
 )
@@ -35,19 +34,19 @@ const (
 )
 
 type GeminiMessagesCompatService struct {
-	accountRepo      ports.AccountRepository
-	cache            ports.GatewayCache
+	accountRepo      AccountRepository
+	cache            GatewayCache
 	tokenProvider    *GeminiTokenProvider
 	rateLimitService *RateLimitService
-	httpUpstream     ports.HTTPUpstream
+	httpUpstream     HTTPUpstream
 }
 
 func NewGeminiMessagesCompatService(
-	accountRepo ports.AccountRepository,
-	cache ports.GatewayCache,
+	accountRepo AccountRepository,
+	cache GatewayCache,
 	tokenProvider *GeminiTokenProvider,
 	rateLimitService *RateLimitService,
-	httpUpstream ports.HTTPUpstream,
+	httpUpstream HTTPUpstream,
 ) *GeminiMessagesCompatService {
 	return &GeminiMessagesCompatService{
 		accountRepo:      accountRepo,

backend/internal/service/gemini_oauth.go

@@ -1,4 +1,4 @@
-package ports
+package service
 
 import (
 	"context"

backend/internal/service/gemini_oauth_service.go

@@ -15,21 +15,20 @@ import (
 	"github.com/Wei-Shaw/sub2api/internal/config"
 	"github.com/Wei-Shaw/sub2api/internal/model"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/geminicli"
-	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 type GeminiOAuthService struct {
 	sessionStore *geminicli.SessionStore
-	proxyRepo    ports.ProxyRepository
-	oauthClient  ports.GeminiOAuthClient
-	codeAssist   ports.GeminiCliCodeAssistClient
+	proxyRepo    ProxyRepository
+	oauthClient  GeminiOAuthClient
+	codeAssist   GeminiCliCodeAssistClient
 	cfg          *config.Config
 }
 
 func NewGeminiOAuthService(
-	proxyRepo ports.ProxyRepository,
-	oauthClient ports.GeminiOAuthClient,
-	codeAssist ports.GeminiCliCodeAssistClient,
+	proxyRepo ProxyRepository,
+	oauthClient GeminiOAuthClient,
+	codeAssist GeminiCliCodeAssistClient,
 	cfg *config.Config,
 ) *GeminiOAuthService {
 	return &GeminiOAuthService{

backend/internal/service/gemini_token_cache.go

@@ -1,4 +1,4 @@
-package ports
+package service
 
 import (
 	"context"

backend/internal/service/gemini_token_provider.go

@@ -9,7 +9,6 @@ import (
 	"time"
 
 	"github.com/Wei-Shaw/sub2api/internal/model"
-	"github.com/Wei-Shaw/sub2api/internal/service/ports"
 )
 
 const (
@@ -18,14 +17,14 @@ const (
 )
 
 type GeminiTokenProvider struct {
-	accountRepo        ports.AccountRepository
-	tokenCache         ports.GeminiTokenCache
+	accountRepo        AccountRepository
+	tokenCache         GeminiTokenCache
 	geminiOAuthService *GeminiOAuthService
 }
 
 func NewGeminiTokenProvider(
-	accountRepo ports.AccountRepository,
-	tokenCache ports.GeminiTokenCache,
+	accountRepo AccountRepository,
+	tokenCache GeminiTokenCache,
 	geminiOAuthService *GeminiOAuthService,
 ) *GeminiTokenProvider {
 	return &GeminiTokenProvider{

backend/internal/service/geminicli_codeassist.go

@@ -1,4 +1,4 @@
-package ports
+package service
 
 import (
 	"context"