feat: migrate frontend to Astro + expand AI moderation + backend admin/runtime config

Frontend:
- migrate from Vite to Astro (astro.config.mjs, pages/, layouts/)
- add admin panel, settings page, command palette, error boundary
- refactor App.tsx, MascotChatbot, Sidebar, Header, DashboardLayout
- update API client, WebSocket, auth, dashboard features

Backend:
- add admin module and config routes
- refactor middlewares, Redis connection, WebSocket server/bridge
- add runtime config loader

Discord Gateway:
- refactor AI moderation: circuit breaker, concurrency limiter, fallback processor
- add media analysis client, Seaxng search, user profile learner
- add new drizzle migration

Shared:
- extend database schema, add new config fields

packages/shared/src/config/index.ts

@@ -59,7 +59,13 @@ export const configSchema = z
       .optional()
       .transform((v) => v === "true")
       .default(false),
-    ADMIN_PASSWORD: z.string().default("admin123"),
+    ADMIN_PASSWORD: z.string().min(1, "ADMIN_PASSWORD is required — set it in your .env file"),
+    DASHBOARD_IS_PUBLIC: z
+      .string()
+      .optional()
+      .transform((v) => v === "true")
+      .default(false),
+
     WEBHOOK_URLS: z
       .string()
       .default("")
@@ -122,7 +128,7 @@ export const configSchema = z
       .string()
       .url()
       .default("https://9router.asepharyana.my.id/v1"),
-    AI_LLM_MODEL: z.string().default("text"),
+    AI_LLM_MODEL: z.string().default("gpt-4o-mini"),
     AI_LLM_VISION_MODEL: z.string().optional(),
     AI_LLM_MAX_CONCURRENT: z.coerce.number().int().positive().default(5),
     AI_LLM_IMAGE_MAX_DIMENSION: z.coerce

packages/shared/src/database/schema.ts

@@ -95,6 +95,9 @@ export const pgMessagesTable = pgTable(
     threadAiStatusCreatedIdx: pgIndex(
       "idx_messages_thread_ai_status_created",
     ).on(table.thread_id, table.ai_status, table.created_at, table.id),
+    guildAiStatusAnalyzedIdx: pgIndex(
+      "idx_messages_guild_ai_status_analyzed",
+    ).on(table.guild_id, table.ai_status, table.ai_analyzed_at, table.id),
   }),
 );