feat(prompts): enforce category domain matching and design-system-first workflow

Remove deep parallel delegation section from GPT-5.4 Sisyphus prompt since
it encouraged direct implementation over orchestration. Add zero-tolerance
category domain matching guide to all Sisyphus prompts with visual-engineering
examples. Rewrite visual-engineering category prompt with 4-phase mandatory
workflow (analyze design system, create if missing, build with system, verify)
targeting Gemini's tendency to skip foundational steps.

src/agents/sisyphus/gpt-5-4.ts

@@ -27,7 +27,6 @@ import {
   buildOracleSection,
   buildHardBlocksSection,
   buildAntiPatternsSection,
-  buildDeepParallelSection,
   buildNonClaudePlannerSection,
   categorizeTools,
 } from "../dynamic-agent-prompt-builder";
@@ -90,7 +89,6 @@ export function buildGpt54SisyphusPrompt(
   const oracleSection = buildOracleSection(availableAgents);
   const hardBlocks = buildHardBlocksSection();
   const antiPatterns = buildAntiPatternsSection();
-  const deepParallelSection = buildDeepParallelSection(model, availableCategories);
   const nonClaudePlannerSection = buildNonClaudePlannerSection(model);
   const taskManagementSection = buildGpt54TaskManagementSection(useTaskSystem);
   const todoHookNote = useTaskSystem
@@ -261,8 +259,6 @@ ${categorySkillsGuide}
 
 ${nonClaudePlannerSection}
 
-${deepParallelSection}
-
 ${delegationTable}
 
 ### Delegation prompt structure (all 6 sections required):