feat: implement English Style Converter

- SvelteKit project scaffolded with TypeScript
- Type definitions for Style, StyleCategory, ConversionRequest, ConversionResponse, LLMConfig
- Style definitions with 6 categories and 25 sub-styles
- Intensity mapping (1-5) with prompt modifier placeholders
- LLM client using OpenAI-compatible API (Ollama default)
- POST /api/convert endpoint with input validation
- Animated loading modal with per-letter animations
- Main page UI with category/style selectors, intensity slider
- Copy to clipboard, collapsible prompt display
- Vitest tests for styles, LLM prompt building, and API validation
- Environment configuration for LLM settings

src/app.css

@@ -0,0 +1,27 @@
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
+
+:global(body) {
+	margin: 0;
+	padding: 0;
+	font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+	background: #f9fafb;
+	color: #1f2937;
+	-webkit-font-smoothing: antialiased;
+	-moz-osx-font-smoothing: grayscale;
+}
+
+:global(*) {
+	box-sizing: border-box;
+}
+
+:global(h1, h2, h3, h4, h5, h6) {
+	margin: 0;
+}
+
+:global(button) {
+	font-family: inherit;
+}
+
+:global(textarea) {
+	font-family: inherit;
+}