Add AI agent capabilities and integrate with Anthropic and LNbits

Integrate Anthropic AI for agent capabilities, introduce database schemas for jobs and invoices, and set up LNbits for payment processing.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 418bf6f8-212b-4bb0-a7a5-8231a061da4e
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: cce28acc-aeac-46ff-80ec-af4ade39e30f
Replit-Helium-Checkpoint-Created: true

lib/db/src/schema/messages.ts

@@ -0,0 +1,23 @@
+import { integer, pgTable, serial, text, timestamp } from "drizzle-orm/pg-core";
+import { createInsertSchema } from "drizzle-zod";
+import { z } from "zod/v4";
+
+import { conversations } from "./conversations";
+
+export const messages = pgTable("messages", {
+  id: serial("id").primaryKey(),
+  conversationId: integer("conversation_id")
+    .notNull()
+    .references(() => conversations.id, { onDelete: "cascade" }),
+  role: text("role").notNull(),
+  content: text("content").notNull(),
+  createdAt: timestamp("created_at", { withTimezone: true }).defaultNow().notNull(),
+});
+
+export const insertMessageSchema = createInsertSchema(messages).omit({
+  id: true,
+  createdAt: true,
+});
+
+export type Message = typeof messages.$inferSelect;
+export type InsertMessage = z.infer<typeof insertMessageSchema>;