rebrand: Workavia Mail (tier 1+2+3+4)

Tier 1+2 - web/UI user-facing:
- Replace all visible "Twake Mail" / "Linagora" with "Workavia Mail"
- Swap 3 logo SVGs (icon kept, wordmark replaced via SVG <text>)
- Splash: replace icon_twp.png with HTML <div>Workavia</div>
- Remove power_by_linagora.svg, replace with AGPL SourceLinkWidget
- Patch web/index.html, manifest.json, login/logout-callback HTMLs
- Patch all 16 ARB locales + scribe ARB + app_localizations.dart
- Patch 4 web/i18n/*.json (FR/EN/DE/VI smart banner titles)
- App grid reduced to "Mail" + "Calendar"
- User-Agent: Twake-Mail -> Workavia-Mail

Tier 3+4 - mobile native:
- Bundle ID: com.linagora.{android,ios}.teammail -> com.workavia.mail
- URL schemes consolidated: teammail.mobile/twakemail.mobile -> workaviamail.mobile
- Android: applicationId, namespace, AndroidManifest, strings.xml
- Android: move Kotlin sources com.linagora.android.tmail -> com.workavia.mail
- Android: empty branding.xml + android12branding.xml (vector text not patchable)
- iOS: Info.plist (CFBundleDisplayName/Name, schemes), Runner.entitlements
- iOS: TwakeMailNSE + TeamMailShareExtension entitlements + Info.plist
- iOS: Runner.xcodeproj (12x PRODUCT_BUNDLE_IDENTIFIER, 9x APP_GROUP_ID)
- iOS: TokenRefreshManager.swift redirect URLs
- iOS: fastlane Appfile + Matchfile
- Dart: oidc_constant, app_config keychain, notification MethodChannel

Known follow-ups (require user action):
- Apple Team ID KUT463DS29 (still Linagora) -> needs Workavia team for App Store
- Android branding.xml emptied: need PNG/path-converted wordmark for splash
- iOS sub-bundle paths (TwakeMailNSE/, TeamMailShareExtension/) on disk unchanged
- iOS App Store URL emptied; Play Store ID points to com.workavia.mail

lib/l10n/intl_zh_Hans.arb

@@ -87,7 +87,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "login_text_slogan": "Twake Mail",
+  "login_text_slogan": "V-Mail",
   "@login_text_slogan": {
     "type": "text",
     "placeholders_order": [],
@@ -1235,7 +1235,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "bannerProgressingRecoveryMessage": "恢复正在进行中。您可以继续使用 Twake Mail",
+  "bannerProgressingRecoveryMessage": "恢复正在进行中。您可以继续使用 V-Mail",
   "@bannerProgressingRecoveryMessage": {
     "type": "text",
     "placeholders_order": [],
@@ -1621,7 +1621,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "page_name": "Twake Mail",
+  "page_name": "V-Mail",
   "@page_name": {
     "type": "text",
     "placeholders_order": [],
@@ -1733,7 +1733,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "app_name": "Twake Mail",
+  "app_name": "V-Mail",
   "@app_name": {
     "type": "text",
     "placeholders_order": [],
@@ -1999,7 +1999,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "languageSubtitle": "设置您在 Twake Mail 上使用的语言。",
+  "languageSubtitle": "设置您在 V-Mail 上使用的语言。",
   "@languageSubtitle": {
     "type": "text",
     "placeholders_order": [],
@@ -2137,13 +2137,13 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "pleaseAllowNotifications": "请在设备的设置中允许来自 Twake Mail 的通知",
+  "pleaseAllowNotifications": "请在设备的设置中允许来自 V-Mail 的通知",
   "@pleaseAllowNotifications": {
     "type": "text",
     "placeholders_order": [],
     "placeholders": {}
   },
-  "allowsTwakeMailToNotifyYouWhenANewMessageArrivesOnYourPhone": "允许 Twake Mail 在您的手机上收到新邮件时通知您",
+  "allowsTwakeMailToNotifyYouWhenANewMessageArrivesOnYourPhone": "允许 V-Mail 在您的手机上收到新邮件时通知您",
   "@allowsTwakeMailToNotifyYouWhenANewMessageArrivesOnYourPhone": {
     "type": "text",
     "placeholders_order": [],
@@ -2307,7 +2307,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "appTitlePushNotification": "Twake Mail",
+  "appTitlePushNotification": "V-Mail",
   "@appTitlePushNotification": {
     "type": "text",
     "placeholders_order": [],
@@ -3063,7 +3063,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "createTwakeIdFailed": "创建 Twake ID 失败，请重新检查。",
+  "createTwakeIdFailed": "创建 Workavia ID 失败，请重新检查。",
   "@createTwakeIdFailed": {
     "type": "text",
     "placeholders_order": [],
@@ -3147,7 +3147,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "createTwakeId": "创建 Twake ID",
+  "createTwakeId": "创建 Workavia ID",
   "@createTwakeId": {
     "type": "text",
     "placeholders_order": [],
@@ -4789,13 +4789,13 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "quotaBannerWarningSubtitleWithPremium": "要继续发送邮件并使用 Twake Mail 所有功能，请考虑清理或升级您的存储空间。",
+  "quotaBannerWarningSubtitleWithPremium": "要继续发送邮件并使用 V-Mail 所有功能，请考虑清理或升级您的存储空间。",
   "@quotaBannerWarningSubtitleWithPremium": {
     "type": "text",
     "placeholders_order": [],
     "placeholders": {}
   },
-  "quotaBannerWarningSubtitleWithoutPremium": "要继续发送邮件并使用 Twake Mail 所有功能，请考虑清理。",
+  "quotaBannerWarningSubtitleWithoutPremium": "要继续发送邮件并使用 V-Mail 所有功能，请考虑清理。",
   "@quotaBannerWarningSubtitleWithoutPremium": {
     "type": "text",
     "placeholders_order": [],
@@ -5227,7 +5227,7 @@
     "placeholders_order": [],
     "placeholders": {}
   },
-  "manageYourTwakeAccount": "管理您的 Twake 账号",
+  "manageYourTwakeAccount": "管理您的 Workavia 账号",
   "@manageYourTwakeAccount": {
     "type": "text",
     "placeholders_order": [],