fix(localrepo): Exact local package match, no .old on medium, rebuild on bump

- tests: match localrepo packages by exact name (foo no longer satisfied
  by foo-bar-*.pkg.tar.zst).
- update.sh: copy the db/files by name so repo-add's *.old backups stay
  off the medium.
- build-end4-deps.sh: rebuild a local PKGBUILD when it is newer than the
  built package (a quickshell _commit bump used to be skipped).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

localrepo/build-end4-deps.sh

@@ -59,8 +59,12 @@ build_local_pkgbuild() {
   local pkg_name
   pkg_name=$(basename "${pkg_dir}")
 
-  if ls "${REPO_DIR}"/illogical-impulse-"${pkg_name}"-*.pkg.tar.zst 1>/dev/null 2>&1; then
-    info "Package already exists in localrepo, skipping: ${pkg_name}"
+  # Skip only while a built package is newer than its PKGBUILD - bumping
+  # e.g. quickshell's _commit must trigger a rebuild, not ship the old one.
+  if [[ -n "$(find "${REPO_DIR}" -maxdepth 1 \
+      -name "illogical-impulse-${pkg_name}-*.pkg.tar.zst" \
+      -newer "${pkg_dir}/PKGBUILD" -print -quit)" ]]; then
+    info "Package up to date in localrepo, skipping: ${pkg_name}"
     return 0
   fi