fix: improve contributor mode + qa-quick E2E reliability

Contributor mode:
- Add "do not truncate" directive to template — agent was stopping
  after "My rating" without completing Steps/Raw output/What would
  make this a 10 sections
- Restore assertions for Steps to reproduce and Date footer

QA quick:
- Make test server URL prominent: top of prompt, explicit "already
  running" and "do NOT discover ports" instructions
- Bump session timeout 180s→240s and test timeout 240s→300s
- Set B= at top of prompt (was buried in prose)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/gen-skill-docs.ts

@@ -131,7 +131,7 @@ If \`_CONTRIB\` is \`true\`: you are in **contributor mode**. You're a gstack us
 
 **NOT worth filing:** user's app bugs, network errors to user's URL, auth failures on user's site, user's own JS logic bugs.
 
-**To file:** write \`~/.gstack/contributor-logs/{slug}.md\`:
+**To file:** write \`~/.gstack/contributor-logs/{slug}.md\` with **all sections below** (do not truncate — include every section through the Date/Version footer):
 
 \`\`\`
 # {Title}
@@ -146,7 +146,9 @@ Hey gstack team — ran into this while using /{skill-name}:
 1. {step}
 
 ## Raw output
-(error messages or unexpected output in a code block)
+\`\`\`
+{paste the actual error or unexpected output here}
+\`\`\`
 
 ## What would make this a 10
 {one sentence: what gstack should have done differently}