ci: promote unit tests to a hard gate

108 deterministic pure-logic tests now block the build job (and thus deploy) on
failure, alongside the Build step. Moved out of the informational quality-checks
section and dropped continue-on-error.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -47,14 +47,13 @@ jobs:
           NODE_OPTIONS: '--max_old_space_size=4096'
           VITE_APP_VERSION: ${{ github.sha }}
 
-      # ── Quality checks (informational — pre-existing issues exist) ───────
-      # Unit tests run on Node's built-in runner via tsx (no vitest — Vite 8 is
-      # ahead of vitest's supported range). Informational for now to match the
-      # section's convention; promote to a hard gate by dropping continue-on-error.
+      # Unit tests are a hard gate too — deterministic pure-logic tests on Node's
+      # built-in runner via tsx (no vitest — Vite 8 is ahead of vitest's range).
+      # A failure blocks the deploy.
       - name: Unit tests
         run: npm test
-        continue-on-error: true
 
+      # ── Quality checks (informational — pre-existing issues exist) ───────
       - name: TypeScript
         run: npm run typecheck
         continue-on-error: true