Changes

PR #2033 by dependabot and ksylvan: Web UI: Dependabot upgrades and bug fixes

• Update Svelte to version 5.53.5 and upgrade @sveltejs/vite-plugin-svelte to 4.0.0, keeping core dependencies current
• Upgrade Rollup to version 4.59.0 and lucide-svelte to version 0.575.0 for improved bundling and iconography support
• Replace custom npm and pnpm install scripts with a standardized postinstall script for svelte-kit sync, simplifying the setup process
• Fix self-closing tags in Svelte components and update transcript joining to use newlines, resolving rendering and formatting issues
• Make the cleanPatternOutput method public in ChatService and remove the svelte-markdown dependency, reducing bundle size and improving API accessibility

PR #2034 by konstantint and ksylvan: feat: add create_slides pattern

• Add new create_slides pattern for generating Reveal.js HTML slideshows
• Register create_slides across CONVERSION, VISUALIZE, and WRITING categories
• Add create_slides to the pattern explanations index and suggest_pattern user guide
• Insert create_slides entry into pattern_descriptions.json and pattern_extracts.json with relevant tags
• Shift pattern numbering from 97 onward to accommodate the new entry