style: add Tailwind Typography plugin for proper markdown rendering

Installed @tailwindcss/typography plugin to fix 'wall of text' issue in documentation.
The prose classes now properly style markdown HTML elements with:
- Proper margins and spacing for headings, paragraphs, lists
- Line-height and typography improvements
- Styled code blocks, blockquotes, tables, and links

Changes:
- Add @tailwindcss/typography to devDependencies
- Configure plugin in tailwind.config.ts
- Regenerate CSS with typography styles included

internal/docs/handler.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 
 	"github.com/yuin/goldmark"
-	"github.com/yuin/goldmark-highlighting"
+	highlighting "github.com/yuin/goldmark-highlighting"
 	"github.com/yuin/goldmark/extension"
 	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/renderer/html"
@@ -57,7 +57,7 @@ func (h *DocsHandler) LoadDocument(docPath string) (*templates.Document, error)
 
 	// Default to INDEX.md if root
 	if docPath == "" || docPath == "docs" {
-		docPath = "INDEX.md"
+		docPath = "index.md"
 	} else {
 		// Remove /docs prefix if present
 		docPath = strings.TrimPrefix(docPath, "docs/")

internal/docs/navigation.go

@@ -30,7 +30,7 @@ func (h *DocsHandler) BuildNavigation() *templates.Navigation {
 	for _, doc := range docs {
 		// Skip INDEX.md files in subdirectories (they're section landing pages, not nav items)
 		// Only show root INDEX.md, skip all others like user/INDEX.md, api/INDEX.md, etc.
-		if strings.HasSuffix(doc, "INDEX.md") && doc != "INDEX.md" {
+		if strings.HasSuffix(doc, "index.md") && doc != "index.md" {
 			continue
 		}
 
@@ -151,7 +151,7 @@ func (h *DocsHandler) getDocIcon(docPath string) string {
 	if strings.Contains(docPath, "contributing") || strings.Contains(docPath, "DEVELOPMENT") {
 		return "🛠️"
 	}
-	if strings.Contains(docPath, "INDEX") {
+	if strings.Contains(docPath, "index") {
 		return "📚"
 	}
 	if strings.Contains(docPath, "troubleshooting") {