fix: listing review round + compose web build-timeout passthrough

- listing grid collapses at 900/620 (source-order fix), route-substring
  kind fallback gated to empty non-category listings, section-head shows
  item/page counts, Popular reads linked, category h1 assertions
- compose: SITEFORGE_BUILD_TIMEOUT_SECONDS now passed to web service
  (enqueue side reads it — upstream gap found during mirror builds)
- chore: ignore runtime state files

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

.gitignore

@@ -17,3 +17,10 @@ hesupipe_clean2.xml
 .s10_*
 .sf_*
 .s87_*
+.jobid.txt
+.w.json
+.pv.txt
+.mj*.json
+.st.json
+.full_results.txt
+.pristine_results.txt