feat: update dependencies and improve dashboard functionality

- Added new dependencies for Next.js and lucide-react in pnpm-workspace.yaml.
- Refactored DashboardPage component to improve readability and error handling.
- Enhanced Header component to display error status with an alert icon.
- Updated MobileTabBar and Sidebar components to use a centralized tabs definition.
- Improved ChannelsView in dashboard-panel to handle channel fetching more cleanly.
- Fixed ActiveSpeaker type to use camelCase for userId.
- Updated MessagesPanel to handle guildId checks more gracefully.
- Adjusted API calls in dashboard and messages to align with backend expectations.
- Refined type definitions across various interfaces for consistency and clarity.

services/discord-gateway/src/modules/ai-moderation/mediaAnalysisClient.ts

@@ -550,7 +550,7 @@ async function downloadMediaCandidate(
   imageMap: Map<string, MessageImagePart[]>,
   mediaAnalysisMap: Map<string, string[]>,
 ): Promise<void> {
-  const log = createChildLogger("mediaAnalysis");
+  const _log = createChildLogger("mediaAnalysis");
   if ((imageMap.get(targetId)?.length ?? 0) >= 8) return;
 
   if (candidate.customEmojiId || candidate.stickerName) {
@@ -646,7 +646,7 @@ export async function prepareMediaMessage(
   target: MessageRecord,
   allAttachments: AttachmentRecord[] | undefined,
 ): Promise<PreparedMediaMessage> {
-  const log = createChildLogger("mediaAnalysis");
+  const _log = createChildLogger("mediaAnalysis");
   const targetId = target.id;
   const imageMap = new Map<string, MessageImagePart[]>();
   const webTextMap = new Map<string, string[]>();