refactor: 彻底移除 Sora 视频生成模块（全栈清理）

## 后端变更
- 删除 21 个 sora_*.go 服务文件（service/handler/repository/routes）
- 删除 Sora 相关 migration 文件（046/047/063/090）
- 清理 config 中的 sora_* 配置项和平台常量
- 清理 wire 依赖注入中的 Sora 组件
- 修复 wire_gen.go 语法错误（缺少逗号和闭合括号）
- 移除 go.mod 中的 go-sora2api 依赖
- 更新 ent schema usage_log.go 注释

## 前端变更
- 删除 SoraView、SoraAdminView 及 8 个 Sora 子组件
- 删除 sora API 层和路由配置
- 清理 UserEditModal 中的 Sora 存储配额 UI
- 清理 types/index.ts 中 Sora 相关类型定义
- 清理 stores/app.ts 默认配置
- 清理 i18n 翻译文件 en.ts/zh.ts (~110 行)
- 更新相关测试文件

## 文档更新
- README.md / README_CN.md / README_JA.md: 移除 Sora 状态说明和配置段落
- PROJECT_DIFF.md: 移除 Sora 相关差异描述

## 验证结果
- ✅ Go 编译通过 (go build ./...)
- ✅ TypeScript 类型检查通过 (vue-tsc --noEmit)
- ✅ 后端测试全通过 (0 failures)
- ✅ 前端测试全通过 (59 files, 329 tests, 0 failures)
- ✅ 前端生产构建成功 (23.81s)

backend/internal/config/config.go

@@ -9,7 +9,7 @@
 //   - billing.go      — BillingConfig, PricingConfig
 //   - gateway.go      — GatewayConfig, UserMessageQueue, SchedulingConfig
 //   - gateway_sub.go  — OpenAIWS, UsageRecord, TLSFingerprint sub-structs
-//   - platforms.go    — Sora, Gemini, LinuxDo, OIDC, Update, Idempotency configs
+//   - platforms.go    — Gemini, LinuxDo, OIDC, Update, Idempotency configs
 //   - ops_and_cache.go— LogConfig, OpsConfig, Dashboard, Cache, Cleanup configs
 package config
 
@@ -79,7 +79,6 @@ type Config struct {
 	TokenRefresh            TokenRefreshConfig            `mapstructure:"token_refresh"`
 	RunMode                 string                        `mapstructure:"run_mode" yaml:"run_mode"`
 	Timezone                string                        `mapstructure:"timezone"`
-	Sora                    SoraConfig                    `mapstructure:"sora"`
 	Gemini                  GeminiConfig                  `mapstructure:"gemini"`
 	Update                  UpdateConfig                  `mapstructure:"update"`
 	Idempotency             IdempotencyConfig             `mapstructure:"idempotency"`

backend/internal/config/config_domain_test.go

@@ -49,7 +49,6 @@ func TestConfigStructIntegrity(t *testing.T) {
 	assert.IsType(t, GatewaySchedulingConfig{}, cfg.Gateway.Scheduling)
 	assert.IsType(t, GatewayOpenAIWSSchedulerScoreWeights{}, cfg.Gateway.OpenAIWS.SchedulerScoreWeights)
 
-	assert.IsType(t, SoraConfig{}, cfg.Sora)
 	assert.IsType(t, GeminiConfig{}, cfg.Gemini)
 	assert.IsType(t, UpdateConfig{}, cfg.Update)
 	assert.IsType(t, IdempotencyConfig{}, cfg.Idempotency)
@@ -168,14 +167,6 @@ func TestUserMessageQueueConfig_Methods(t *testing.T) {
 	if q.GetEffectiveMode() != "" { t.Error("disabled+empty → empty") }
 }
 
-func TestSoraConfigFields(t *testing.T) {
-	s := SoraConfig{
-		Client: SoraClientConfig{BaseURL: "https://sora.example.com"},
-		Storage: SoraStorageConfig{Type: "local"},
-	}
-	if s.Client.BaseURL != "https://sora.example.com" { t.Error("BaseURL mismatch") }
-}
-
 func TestGeminiConfigFields(t *testing.T) {
 	g := GeminiConfig{Quota: GeminiQuotaConfig{Policy: "conservative"}}
 	if g.Quota.Policy != "conservative" { t.Error("Policy mismatch") }

backend/internal/config/config_integration_test.go

@@ -322,7 +322,6 @@ func TestIntegration_AllDomainFiles_ContributeToFullConfig(t *testing.T) {
 		{"UsageCleanup/Enabled", func(c *Config) bool { return true }},
 		{"Concurrency/PingInterval", func(c *Config) bool { return c.Concurrency.PingInterval > 0 }},
 		{"TokenRefresh/Enabled", func(c *Config) bool { return true }},
-		{"Sora", func(c *Config) bool { return true }},
 		{"Gemini", func(c *Config) bool { return true }},
 		{"Update", func(c *Config) bool { return true }},
 		{"Idempotency/TTL", func(c *Config) bool { return c.Idempotency.DefaultTTLSeconds > 0 }},

backend/internal/config/config_validate_gateway.go

@@ -1,4 +1,4 @@
-package config
+package config
 
 import (
 	"fmt"

backend/internal/config/gateway.go

@@ -36,16 +36,6 @@ type GatewayConfig struct {
 	InjectBetaForAPIKey       bool `mapstructure:"inject_beta_for_apikey"`
 	FailoverOn400             bool `mapstructure:"failover_on_400"`
 
-	// Sora 专用配置
-	SoraMaxBodySize            int64  `mapstructure:"sora_max_body_size"`
-	SoraStreamTimeoutSeconds   int    `mapstructure:"sora_stream_timeout_seconds"`
-	SoraRequestTimeoutSeconds  int    `mapstructure:"sora_request_timeout_seconds"`
-	SoraStreamMode             string `mapstructure:"sora_stream_mode"`
-	SoraModelFilters           SoraModelFiltersConfig `mapstructure:"sora_model_filters"`
-	SoraMediaRequireAPIKey     bool   `mapstructure:"sora_media_require_api_key"`
-	SoraMediaSigningKey        string `mapstructure:"sora_media_signing_key"`
-	SoraMediaSignedURLTTLSeconds int  `mapstructure:"sora_media_signed_url_ttl_seconds"`
-
 	MaxAccountSwitches         int    `mapstructure:"max_account_switches"`
 	MaxAccountSwitchesGemini   int    `mapstructure:"max_account_switches_gemini"`
 	AntigravityFallbackCooldownMinutes int `mapstructure:"antigravity_fallback_cooldown_minutes"`

backend/internal/config/platforms.go

@@ -1,63 +1,5 @@
 package config
 
-// SoraConfig 直连 Sora 配置
-type SoraConfig struct {
-	Client  SoraClientConfig  `mapstructure:"client"`
-	Storage SoraStorageConfig `mapstructure:"storage"`
-}
-
-// SoraClientConfig Sora 客户端配置
-type SoraClientConfig struct {
-	BaseURL                            string                    `mapstructure:"base_url"`
-	TimeoutSeconds                     int                       `mapstructure:"timeout_seconds"`
-	MaxRetries                         int                       `mapstructure:"max_retries"`
-	CloudflareChallengeCooldownSeconds int                       `mapstructure:"cloudflare_challenge_cooldown_seconds"`
-	PollIntervalSeconds                int                       `mapstructure:"poll_interval_seconds"`
-	MaxPollAttempts                    int                       `mapstructure:"max_poll_attempts"`
-	RecentTaskLimit                    int                       `mapstructure:"recent_task_limit"`
-	RecentTaskLimitMax                 int                       `mapstructure:"recent_task_limit_max"`
-	Debug                              bool                      `mapstructure:"debug"`
-	UseOpenAITokenProvider             bool                      `mapstructure:"use_openai_token_provider"`
-	Headers                            map[string]string         `mapstructure:"headers"`
-	UserAgent                          string                    `mapstructure:"user_agent"`
-	DisableTLSFingerprint              bool                      `mapstructure:"disable_tls_fingerprint"`
-	CurlCFFISidecar                    SoraCurlCFFISidecarConfig `mapstructure:"curl_cffi_sidecar"`
-}
-
-// SoraCurlCFFISidecarConfig Sora curl_cffi sidecar 配置
-type SoraCurlCFFISidecarConfig struct {
-	Enabled             bool   `mapstructure:"enabled"`
-	BaseURL             string `mapstructure:"base_url"`
-	Impersonate         string `mapstructure:"impersonate"`
-	TimeoutSeconds      int    `mapstructure:"timeout_seconds"`
-	SessionReuseEnabled bool   `mapstructure:"session_reuse_enabled"`
-	SessionTTLSeconds   int    `mapstructure:"session_ttl_seconds"`
-}
-
-// SoraStorageConfig 媒体存储配置
-type SoraStorageConfig struct {
-	Type                   string                   `mapstructure:"type"`
-	LocalPath              string                   `mapstructure:"local_path"`
-	FallbackToUpstream     bool                     `mapstructure:"fallback_to_upstream"`
-	MaxConcurrentDownloads int                      `mapstructure:"max_concurrent_downloads"`
-	DownloadTimeoutSeconds int                      `mapstructure:"download_timeout_seconds"`
-	MaxDownloadBytes       int64                    `mapstructure:"max_download_bytes"`
-	Debug                  bool                     `mapstructure:"debug"`
-	Cleanup                SoraStorageCleanupConfig `mapstructure:"cleanup"`
-}
-
-// SoraStorageCleanupConfig 媒体清理配置
-type SoraStorageCleanupConfig struct {
-	Enabled       bool   `mapstructure:"enabled"`
-	Schedule      string `mapstructure:"schedule"`
-	RetentionDays int    `mapstructure:"retention_days"`
-}
-
-// SoraModelFiltersConfig Sora 模型过滤配置
-type SoraModelFiltersConfig struct {
-	HidePromptEnhance bool `mapstructure:"hide_prompt_envelope"`
-}
-
 // GeminiConfig Gemini 配置
 type GeminiConfig struct {
 	OAuth GeminiOAuthConfig `mapstructure:"oauth"`