refactor(hooks): drop the pre-push spotless infra-skip

With the Gradle distribution now pre-seeded in the web sandbox
(session-start.sh) and dependencies resolving through the proxy, spotlessApply
no longer fails for infra reasons. Remove the network-error skip branch so any
spotlessApply failure blocks the push: a failure now means a real
formatting/compile error, and the narrow regex can no longer mask one.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A7bocRTSPyXwz6zVMzDbKR

.claude/hooks/pre-push-spotless.sh

@@ -63,15 +63,10 @@ before="$(git diff HEAD -- '*.kt' '*.kts' 2>/dev/null | sha1sum)"
 
 log="$(mktemp /tmp/spotless-gate.XXXXXX.log)"
 if ! ./gradlew spotlessApply >"$log" 2>&1; then
-  # Distinguish a formatting failure (block) from Gradle being unable to RUN —
-  # e.g. deps can't resolve in a restricted sandbox. An infra failure must not
-  # strand the agent; warn and let CI's spotlessCheck be the backstop.
-  if grep -qiE "could not resolve|could not (get|download)|handshake|connect timed out|no address|unable to (find|resolve) host|read timed out" "$log"; then
-    echo "WARN: could not run spotlessApply (Gradle infra/network failure), skipping the formatting gate." >&2
-    echo "      CI's spotlessCheck still enforces formatting on the PR." >&2
-    rm -f "$log"
-    exit 0
-  fi
+  # Any failure blocks. The web sandbox pre-seeds the Gradle distribution (see
+  # .claude/hooks/session-start.sh) and Gradle resolves deps through the proxy,
+  # so spotlessApply no longer fails for infra reasons — a failure here is a
+  # real formatting/compile error, not a restricted-sandbox hiccup.
   echo "BLOCKED: spotlessApply failed — fix the build/formatting error before pushing." >&2
   echo "----- gradle output (tail) -----" >&2
   tail -n 40 "$log" >&2