feat(ms22-p2): add AgentTemplate admin CRUD endpoints (#678)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/api/src/agent-template/agent-template.service.ts

@@ -0,0 +1,57 @@
+import { Injectable, NotFoundException, ConflictException } from "@nestjs/common";
+import { PrismaService } from "../prisma/prisma.service";
+import { CreateAgentTemplateDto } from "./dto/create-agent-template.dto";
+import { UpdateAgentTemplateDto } from "./dto/update-agent-template.dto";
+
+@Injectable()
+export class AgentTemplateService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async findAll() {
+    return this.prisma.agentTemplate.findMany({
+      orderBy: { createdAt: "asc" },
+    });
+  }
+
+  async findOne(id: string) {
+    const template = await this.prisma.agentTemplate.findUnique({ where: { id } });
+    if (!template) throw new NotFoundException(`AgentTemplate ${id} not found`);
+    return template;
+  }
+
+  async findByName(name: string) {
+    const template = await this.prisma.agentTemplate.findUnique({ where: { name } });
+    if (!template) throw new NotFoundException(`AgentTemplate "${name}" not found`);
+    return template;
+  }
+
+  async create(dto: CreateAgentTemplateDto) {
+    const existing = await this.prisma.agentTemplate.findUnique({ where: { name: dto.name } });
+    if (existing) throw new ConflictException(`AgentTemplate "${dto.name}" already exists`);
+
+    return this.prisma.agentTemplate.create({
+      data: {
+        name: dto.name,
+        displayName: dto.displayName,
+        role: dto.role,
+        personality: dto.personality,
+        primaryModel: dto.primaryModel,
+        fallbackModels: dto.fallbackModels ?? ([] as string[]),
+        toolPermissions: dto.toolPermissions ?? ([] as string[]),
+        ...(dto.discordChannel !== undefined && { discordChannel: dto.discordChannel }),
+        isActive: dto.isActive ?? true,
+        isDefault: dto.isDefault ?? false,
+      },
+    });
+  }
+
+  async update(id: string, dto: UpdateAgentTemplateDto) {
+    await this.findOne(id);
+    return this.prisma.agentTemplate.update({ where: { id }, data: dto });
+  }
+
+  async remove(id: string) {
+    await this.findOne(id);
+    return this.prisma.agentTemplate.delete({ where: { id } });
+  }
+}