perf(deploy): keep .next/cache while clearing stale generated types

Nuclear src replace already guarantees clean sources; restoring the build cache speeds deploys without reintroducing sticky typecheck ghosts.

Co-authored-by: Cursor <[email protected]>

.gitea/workflows/deploy.yaml

@@ -88,8 +88,9 @@ jobs:
           rm -f tsconfig.tsbuildinfo .tsbuildinfo
           find . -maxdepth 3 -name '*.tsbuildinfo' -delete 2>/dev/null || true
 
-          # Wipe .next entirely — partial cache has disagreed with clean sources.
-          rm -rf .output dist .next
+          # Clear generated Next types/dev dirs, but keep .next/cache for faster rebuilds.
+          # Full src/ nuclear replace above already guarantees sources match HEAD.
+          rm -rf .output dist .next/types .next/dev
 
           # Release tag for Sentry / logs (short git sha)
           export APP_VERSION="$(git rev-parse --short HEAD)"

src/lib/deploy-workflow-contract.test.ts

@@ -8,8 +8,10 @@ describe("production deploy workflow", () => {
 		"utf8",
 	);
 
-	it("wipes .next before build to avoid stale Next typecheck caches", () => {
-		expect(workflow).toContain("rm -rf .output dist .next");
+	it("preserves the Next.js incremental build cache", () => {
+		// May clear .next/types or .next/dev, but must not wipe the whole .next tree.
+		expect(workflow).not.toMatch(/rm\s+-rf\s+\.next(?:\s|$)/);
+		expect(workflow).toContain("rm -rf .output dist .next/types .next/dev");
 		expect(workflow).toContain("pnpm install --frozen-lockfile");
 		expect(workflow).toContain("SKIP_ENV_VALIDATION=1");
 	});