feat: Add DSS infrastructure, remove legacy admin-ui code

- Remove legacy admin-ui/js/ vanilla JS components
- Add .dss/ directory with core tokens, skins, themes
- Add Storybook configuration and generated stories
- Add DSS management scripts (dss-services, dss-init, dss-setup, dss-reset)
- Add MCP command definitions for DSS plugin
- Add Figma sync architecture and scripts
- Update pre-commit hooks with documentation validation
- Fix JSON trailing commas in skin files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

scripts/regenerate-core-hashes.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# Regenerate DSS Core Structure Hashes
+# Called after successful Figma sync to update hash manifest
+#
+# Usage: scripts/regenerate-core-hashes.sh
+# This script should ONLY be called by the Figma sync pipeline
+
+set -e
+
+HASH_FILE=".dss/core-hashes.sha256"
+
+echo "Regenerating DSS core hashes..."
+
+{
+  echo "# DSS Core Structure Hashes"
+  echo "# Generated: $(date -Iseconds)"
+  echo "# Source: Figma sync pipeline"
+  echo "# DO NOT EDIT MANUALLY"
+  echo ""
+  echo "# Format: SHA256  filepath"
+
+  # Hash schema files
+  for f in .dss/schema/*.json; do
+    [ -f "$f" ] && sha256sum "$f"
+  done
+
+  # Hash skin files
+  for f in dss-claude-plugin/core/skins/*.json; do
+    [ -f "$f" ] && sha256sum "$f"
+  done
+
+  # Hash core tokens
+  [ -f "dss/core_tokens/tokens.json" ] && sha256sum "dss/core_tokens/tokens.json"
+
+  # Hash _system output if exists
+  if [ -d ".dss/data/_system" ]; then
+    find .dss/data/_system -type f -name "*.json" -o -name "*.css" -o -name "*.scss" 2>/dev/null | while read f; do
+      sha256sum "$f"
+    done
+  fi
+} > "$HASH_FILE"
+
+echo "Hash manifest updated: $HASH_FILE"
+echo "Files hashed: $(grep -c "^[a-f0-9]" "$HASH_FILE")"