feat(sub): add Happ client integration, routing presets, and app management (#6434)

* feat(sub): add Happ client integration, routing presets, and app management

Implement comprehensive Happ proxy client integration according to official developer specifications.

- Fix header emission on disabled routing and hidden settings to send explicit '0' headers rather than omitting, allowing Happ clients to reset cached settings.
- Add support for 'happ://routing/off' deeplink in routing validation.
- Preserve '?serverDescription=' query parameters in link fragments without escaping to support Happ server subtitles across VMess, VLESS, Trojan and SS.
- Add Happ application management headers: ProviderID, New-Url, Fallback-Url, Sub-Info banners, Sub-Expire notifications, No-Limit mode, hardware ID enforcement, TUN modes/types, route exclusions, APNS exclusions, and per-app proxy settings.
- Add curated routing presets (Iran Bypass, China Direct, AdBlock, Global) and interactive visual rule generator in frontend settings.
- Synchronize all 13 translation locales with native Persian, Russian, and Chinese translations.

* fix(sub): keep Happ header overrides behind the auto-detect opt-in

The Routing-Enable/Hide-Settings off values were emitted on the
User-Agent alone, so every panel that upgraded would push
"Routing-Enable: 0" — documented by happ.su as disabling routing
globally — to every Happ client without the operator enabling anything.
They now ride subHappAutoDetect like every other Happ header.

Two further mismatches against the vendor spec:

- serverDescription was written as a key of the VMess base64 JSON
  object. happ.su documents it as a "#Title?serverDescription=<base64>"
  link parameter or a JSON "meta" entry, so the caption never reached
  Happ while every other VMess consumer received an unknown key.
  Dropped rather than moved: emitting the documented form is unsafe
  here because our own parser base64-decodes the whole VMess body
  (internal/util/link/outbound.go).

- The TUN Mode dropdown stored the literal "default", forwarded as
  "Tun-Mode: default", where happ.su documents system|gvisor only. It
  now stores the unset value so no header is sent. TUN Type "default"
  is a documented value and is unchanged.

Each fix carries a test that fails without it.

internal/web/service/setting.go

@@ -102,6 +102,29 @@ var defaultValueMap = map[string]string{
 	"subEnableRouting":            "false",
 	"subRoutingRules":             "",
 	"subHideSettings":             "false",
+	"subHappAutoDetect":           "false",
+	"subHappProviderId":           "",
+	"subHappNewUrl":               "",
+	"subHappFallbackUrl":          "",
+	"subHappSubInfoColor":         "blue",
+	"subHappSubInfoText":          "",
+	"subHappSubInfoButtonText":    "",
+	"subHappSubInfoButtonLink":    "",
+	"subHappSubExpire":            "false",
+	"subHappSubExpireButtonLink":  "",
+	"subHappNotificationExpire":   "false",
+	"subHappNoLimit":              "false",
+	"subHappAlwaysHwid":           "false",
+	"subHappTunMode":              "",
+	"subHappTunType":              "",
+	"subHappExcludeRoutes":        "",
+	"subHappExcludeApns":          "false",
+	"subHappColorProfile":         "",
+	"subHappPingType":             "",
+	"subHappAutoConnect":          "false",
+	"subHappAutoConnectType":      "lowestdelay",
+	"subHappPerAppMode":           "off",
+	"subHappPerAppList":           "",
 	"subIncyEnableRouting":        "false",
 	"subIncyRoutingRules":         "",
 	"subListen":                   "",
@@ -820,6 +843,98 @@ func (s *SettingService) GetSubHideSettings() (bool, error) {
 	return s.getBool("subHideSettings")
 }
 
+func (s *SettingService) GetSubHappAutoDetect() (bool, error) {
+	return s.getBool("subHappAutoDetect")
+}
+
+func (s *SettingService) GetSubHappProviderId() (string, error) {
+	return s.getString("subHappProviderId")
+}
+
+func (s *SettingService) GetSubHappNewUrl() (string, error) {
+	return s.getString("subHappNewUrl")
+}
+
+func (s *SettingService) GetSubHappFallbackUrl() (string, error) {
+	return s.getString("subHappFallbackUrl")
+}
+
+func (s *SettingService) GetSubHappSubInfoColor() (string, error) {
+	return s.getString("subHappSubInfoColor")
+}
+
+func (s *SettingService) GetSubHappSubInfoText() (string, error) {
+	return s.getString("subHappSubInfoText")
+}
+
+func (s *SettingService) GetSubHappSubInfoButtonText() (string, error) {
+	return s.getString("subHappSubInfoButtonText")
+}
+
+func (s *SettingService) GetSubHappSubInfoButtonLink() (string, error) {
+	return s.getString("subHappSubInfoButtonLink")
+}
+
+func (s *SettingService) GetSubHappSubExpire() (bool, error) {
+	return s.getBool("subHappSubExpire")
+}
+
+func (s *SettingService) GetSubHappSubExpireButtonLink() (string, error) {
+	return s.getString("subHappSubExpireButtonLink")
+}
+
+func (s *SettingService) GetSubHappNotificationExpire() (bool, error) {
+	return s.getBool("subHappNotificationExpire")
+}
+
+func (s *SettingService) GetSubHappNoLimit() (bool, error) {
+	return s.getBool("subHappNoLimit")
+}
+
+func (s *SettingService) GetSubHappAlwaysHwid() (bool, error) {
+	return s.getBool("subHappAlwaysHwid")
+}
+
+func (s *SettingService) GetSubHappTunMode() (string, error) {
+	return s.getString("subHappTunMode")
+}
+
+func (s *SettingService) GetSubHappTunType() (string, error) {
+	return s.getString("subHappTunType")
+}
+
+func (s *SettingService) GetSubHappExcludeRoutes() (string, error) {
+	return s.getString("subHappExcludeRoutes")
+}
+
+func (s *SettingService) GetSubHappExcludeApns() (bool, error) {
+	return s.getBool("subHappExcludeApns")
+}
+
+func (s *SettingService) GetSubHappColorProfile() (string, error) {
+	return s.getString("subHappColorProfile")
+}
+
+func (s *SettingService) GetSubHappPingType() (string, error) {
+	return s.getString("subHappPingType")
+}
+
+func (s *SettingService) GetSubHappAutoConnect() (bool, error) {
+	return s.getBool("subHappAutoConnect")
+}
+
+func (s *SettingService) GetSubHappAutoConnectType() (string, error) {
+	return s.getString("subHappAutoConnectType")
+}
+
+func (s *SettingService) GetSubHappPerAppMode() (string, error) {
+	return s.getString("subHappPerAppMode")
+}
+
+func (s *SettingService) GetSubHappPerAppList() (string, error) {
+	return s.getString("subHappPerAppList")
+}
+
 func (s *SettingService) GetSubIncyEnableRouting() (bool, error) {
 	return s.getBool("subIncyEnableRouting")
 }
@@ -1363,6 +1478,16 @@ func validateSettingsURLs(allSetting *entity.AllSetting) error {
 	// the scheme instead of forcing SanitizeHTTPURL's http(s)-only rule.
 	allSetting.SubSupportUrl = common.EnsureURLScheme(allSetting.SubSupportUrl)
 	allSetting.SubProfileUrl = common.EnsureURLScheme(allSetting.SubProfileUrl)
+	for _, ptr := range []*string{
+		&allSetting.SubHappNewUrl,
+		&allSetting.SubHappFallbackUrl,
+		&allSetting.SubHappSubInfoButtonLink,
+		&allSetting.SubHappSubExpireButtonLink,
+	} {
+		if strings.TrimSpace(*ptr) != "" {
+			*ptr = common.EnsureURLScheme(strings.TrimSpace(*ptr))
+		}
+	}
 	for name, value := range map[string]*string{
 		"Happ routing source":         &allSetting.SubRoutingRules,
 		"Clash/Mihomo routing source": &allSetting.SubClashRules,