ci: typecheck before Vercel build

Adds `pnpm typecheck` (tsc --noEmit) as a step before the Next build
in both deploy-dev.yml and deploy-prod.yml. next build runs its own
type check but only for files reachable from routes — this catches
type drift in shared utils, unused helpers, and MDX page scripts
that the route-traversal check doesn't touch.

Currently passes cleanly; future regressions fail the workflow
before Vercel does its own build.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Mlaz-code

.github/workflows/deploy-dev.yml

@@ -37,6 +37,9 @@ jobs:
 
       - run: pnpm install --frozen-lockfile
 
+      - name: Typecheck
+        run: pnpm typecheck
+
       - name: Build
         run: pnpm build
 

.github/workflows/deploy-prod.yml

@@ -48,6 +48,13 @@ jobs:
 
       - run: pnpm install --frozen-lockfile
 
+      - name: Typecheck
+        # `next build` performs its own tsc-equivalent pass, but only
+        # for files reachable from routes. This runs tsc against the
+        # whole repo so MDX page scripts, shared utils, and unused
+        # helpers don't drift types.
+        run: pnpm typecheck
+
       - name: Build
         run: pnpm build
 

package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "dev": "next dev -H 0.0.0.0 -p 3002",
     "build": "next build && node scripts/fix-locale-links.mjs && pagefind --site out --output-subdir _pagefind",
-    "start": "next start"
+    "start": "next start",
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "next": "^16.1.6",