✨ Emit precompressed sidecars for served assets

Add scripts/precompress.ts, a dependency-free Node 26 tool that writes
.br/.gz/.zst sidecars next to every text asset and keeps the originals, so
static-web-server can serve the variant matching Accept-Encoding and fall
back to the original. The coverage publish step runs it on the copied report.

Wire scripts/*.ts into the toolchain: type-check (tsconfig include), lint and
fix (oxlint paths), knip entry (CI invokes the file rather than importing it),
and a narrow .oxlintrc override allowing node:* imports in Node CLI scripts.

.gitea/workflows/ci.yml

@@ -35,7 +35,10 @@ jobs:
             # served read-only at
             # https://pages.e1nsnull.de/<owner>/<repo>/<tag>/coverage/. Wipe only
             # this tag's `coverage/`, so sibling docs/landing trees and older
-            # tags survive; pruning stale tags is a manual chore.
+            # tags survive; pruning stale tags is a manual chore. The
+            # precompress pass emits `.br` / `.gz` / `.zst` sidecars next to
+            # every text asset, so `static-web-server` can serve the precompressed
+            # variant and keep the original as fallback.
             - name: Publish coverage to the pages server
               if: startsWith(gitea.ref, 'refs/tags/')
               env:
@@ -47,6 +50,7 @@ jobs:
                   rm -rf "${DEST}"
                   mkdir -p "${DEST}"
                   cp -R coverage/. "${DEST}/"
+                  node --strip-types scripts/precompress.ts "${DEST}"
                   echo "Coverage: https://pages.e1nsnull.de/${REPO}/${TAG}/coverage/"
             # Fast, offline packaging gate. `attw` stays in `publish` (it needs
             # a pack + full resolution matrix); `publint` packs too but is cheap