TypeScript/Bun project scaffold

- Stack: Bun, Hono, Drizzle ORM, Zod, Handlebars, Pino
- Models: ticket, queue, transaction, scrip, template, custom_field, user, lifecycle
- Scrip engine: prepare/commit two-phase dispatch, template rendering, mock actions
- Lifecycle validator: state machine transition validation with wildcard support
- Routes: health, tickets (full CRUD + preview + transactions), queues, scrips, custom-fields, lifecycles
- Middleware: Pino logging, error handler
- Database: Drizzle ORM schema + initial migration (10 tables)
- Type-check: passes (tsc --noEmit, zero errors)

src/scrip/templates.ts

@@ -0,0 +1,39 @@
+import Handlebars from 'handlebars';
+
+export class TemplateRenderer {
+  render(
+    subjectTemplate: string,
+    bodyTemplate: string,
+    context: TemplateContext,
+  ): { subject: string; body: string } {
+    const subjectCompiled = Handlebars.compile(subjectTemplate);
+    const bodyCompiled = Handlebars.compile(bodyTemplate);
+    return {
+      subject: subjectCompiled(context),
+      body: bodyCompiled(context),
+    };
+  }
+}
+
+export interface TemplateContext {
+  ticket: {
+    id: string;
+    subject: string;
+    status: string;
+    queue_id: string;
+    owner_id: string | null;
+    creator_id: string;
+    created_at: string;
+    updated_at: string;
+  };
+  queue: {
+    name: string;
+  };
+  transaction: {
+    type: string;
+    field: string | null;
+    old_value: string | null;
+    new_value: string | null;
+  };
+  custom_fields: Record<string, string>;
+}