Enhance Prisma schema and documentation for dashboard features

- Added new models for DashboardAccessRule and DashboardAuditLog to the Prisma schema, improving access control and logging capabilities.
- Updated GuildSettings model to include timezone support.
- Revised PHASE-TRACKING.md to reflect the completion of Phase 5 and outline upcoming Phase 6 features, including dashboard layout and settings framework.
- Exported new phase 6 features in shared index for better modularity.

apps/bot/prisma/schema.prisma

@@ -51,16 +51,47 @@ model Guild {
   socialFeeds SocialFeed[]
   scheduledMessages ScheduledMessage[]
   guildBackups GuildBackup[]
+  dashboardAccessRules DashboardAccessRule[]
+  dashboardAuditLogs DashboardAuditLog[]
 }
 
 model GuildSettings {
   id                String   @id @default(cuid())
   guildId           String   @unique
   locale            String   @default("de")
+  timezone          String   @default("Europe/Berlin")
   moderationEnabled Boolean  @default(true)
   guild             Guild    @relation(fields: [guildId], references: [id], onDelete: Cascade)
 }
 
+model DashboardAccessRule {
+  id        String   @id @default(cuid())
+  guildId   String
+  roleId    String
+  modules   Json
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  guild     Guild    @relation(fields: [guildId], references: [id], onDelete: Cascade)
+
+  @@unique([guildId, roleId])
+  @@index([guildId])
+}
+
+model DashboardAuditLog {
+  id          String   @id @default(cuid())
+  guildId     String?
+  actorUserId String
+  action      String
+  path        String?
+  before      Json?
+  after       Json?
+  createdAt   DateTime @default(now())
+  guild       Guild?   @relation(fields: [guildId], references: [id], onDelete: Cascade)
+
+  @@index([guildId, createdAt])
+  @@index([actorUserId, createdAt])
+}
+
 model User {
   id        String    @id
   createdAt DateTime  @default(now())