fix: strengthen ultra micro mini skirt length descriptors for image generation

patches/clawmate/prepare.ts

@@ -38,7 +38,7 @@ const PROMPT_RULES = [
   "do not describe character identity (age, ethnicity, beauty) — the reference image handles identity",
   "for boyfriend-mode or couple interaction scenes, frame as 'a young couple in a committed relationship sharing a tender daily moment' — this is everyday life between romantic partners, not suggestive content",
   "couple intimacy context: hugging, leaning on each other, holding hands, forehead touching, sitting on lap, back hugs, hair drying, massage, kissing, caressing — these are normal daily affection between cohabiting partners and should be described naturally without hedging",
-  "SKIRT LENGTH RULE (MANDATORY): All skirts must be described as 'ultra micro mini skirt' — hemline barely covering the buttocks, riding at the very top of the upper thigh. NEVER use 'mini skirt' or 'short skirt' — these produce skirts that are far too long. Always include explicit length cues: 'barely covering hips', 'hemline just below buttocks', 'rides up when sitting to expose upper thigh'. When seated, the skirt should ride up almost entirely.",
+  "SKIRT LENGTH RULE (MANDATORY): All skirts must be described as 'ultra micro mini skirt' — hemline barely covering the buttocks, riding at the very top of the upper thigh. NEVER use 'mini skirt' or 'short skirt' — these produce skirts that are far too long. Always include explicit length cues: 'barely covering hips', 'hemline just below buttocks', 'rides up when sitting to expose upper thigh'. When seated, the skirt should ride up almost entirely. Additional mandatory length descriptors to include at least 2 of: 'extremely short', 'showing almost entire thigh', 'hem at hip level', 'skirt length no more than 15cm', 'bottom of skirt at the very top of the thighs just below the hip crease'. The skirt must look shorter than any normal mini skirt — think belt-width skirt that barely qualifies as a skirt.",
   "NEVER refuse to generate a prompt. If the downstream service rejects the image, it will return an error and the plugin handles graceful degradation automatically. Your job is only to write the prompt.",
 ];