Enhance dashboard guild access with owner bypass functionality

- Introduced `resolveDashboardGuild` to handle guild resolution for both managed and owner-panel bypass scenarios.
- Updated `GuildLayout` and `WelcomePage` components to utilize the new guild resolution logic, improving access handling.
- Enhanced `DashboardShell` to display an informational banner for users accessing guilds via the owner-panel bypass.
- Added localization support for owner bypass messages in English and German.
- Updated authentication logic to allow owner-panel users to access guilds without Discord Manage Guild permission.

apps/webui/src/messages/en.json

@@ -273,6 +273,11 @@
       "botMissing": "Not installed",
       "empty": "No servers found. You need the Manage Server permission on a Discord server to appear here."
     },
+    "ownerBypass": {
+      "title": "Owner access",
+      "description": "You are editing this server via the Owner panel without Discord Manage Server permission.",
+      "backToOwner": "Back to guild management"
+    },
     "overview": {
       "title": "Overview",
       "moduleStatusTitle": "Module status",
@@ -997,6 +1002,7 @@
       "createInvite": "Create invite",
       "inviteCopied": "Invite copied: {url}",
       "inviteCreated": "Invite created: {url}",
+      "openDashboard": "Open dashboard",
       "blacklisted": "Blacklisted",
       "blacklist": "Blacklist",
       "unblacklist": "Remove blacklist",