feat(admin-tags): POST /api/admin/tags to create craft/cooperative tags

Admin-only route that validates a label + pool via zod, slugifies the
label, returns the existing tag if the slug already exists, otherwise
creates a new active Tag document.

server/api/admin/tags/index.post.js

@@ -0,0 +1,40 @@
+import Tag from '../../../models/tag.js'
+import { adminTagCreateSchema } from '../../../utils/schemas.js'
+
+const slugify = (s) =>
+  s
+    .toLowerCase()
+    .trim()
+    .replace(/\s+/g, '-')
+    .replace(/[^a-z0-9-]/g, '')
+    .replace(/-+/g, '-')
+    .replace(/^-|-$/g, '')
+
+export default defineEventHandler(async (event) => {
+  await requireAdmin(event)
+  await connectDB()
+
+  const body = await validateBody(event, adminTagCreateSchema)
+  const slug = slugify(body.label)
+
+  if (!slug) {
+    throw createError({
+      statusCode: 400,
+      statusMessage: 'Tag label must contain at least one alphanumeric character'
+    })
+  }
+
+  const existing = await Tag.findOne({ slug })
+  if (existing) {
+    return { tag: { slug: existing.slug, label: existing.label, pool: existing.pool } }
+  }
+
+  const tag = await Tag.create({
+    slug,
+    label: body.label,
+    pool: body.pool,
+    active: true
+  })
+
+  return { tag: { slug: tag.slug, label: tag.label, pool: tag.pool } }
+})

server/utils/schemas.js

@@ -383,6 +383,11 @@ export const tagSuggestionSchema = z.object({
   pool: z.enum(['craft', 'cooperative'])
 })
 
+export const adminTagCreateSchema = z.object({
+  label: z.string().trim().min(1).max(100),
+  pool: z.enum(['craft', 'cooperative'])
+})
+
 // --- Board post / channel schemas ---
 
 export const boardPostCreateSchema = z.object({