feat: miller column browser, offline cache, search, breadcrumbs

- Dynamic miller column sizing with flexbox layout
- Root column (160px), middle slices (48px), active column (flex)
- Auto-scroll browser to rightmost column on navigation
- Offline indicator UI and IndexedDB cache integration
- /api/documents endpoint for client-side document caching
- Breadcrumb navigation in document content area
- FTS5 search with SQLite virtual table
- Client-side Mermaid and KaTeX rendering via CDN
- Deep sample content (advanced-topics/raft-deep-dive)
- Border removal (only search button keeps radius)
- Full viewport layout with proper borders between sidebar/content

apps/server/internal/database/migrate.go

@@ -85,14 +85,53 @@ func migrationApplied(ctx context.Context, db *sql.DB, version string) (bool, er
 }
 
 func splitStatements(body string) []string {
-	raw := strings.Split(body, ";")
-	statements := make([]string, 0, len(raw))
-	for _, statement := range raw {
-		statement = strings.TrimSpace(statement)
-		if statement == "" {
+	var statements []string
+	var current strings.Builder
+	inTrigger := false
+	depth := 0
+
+	lines := strings.Split(body, "\n")
+	for _, line := range lines {
+		trimmed := strings.TrimSpace(line)
+		if trimmed == "" || strings.HasPrefix(trimmed, "--") {
 			continue
 		}
-		statements = append(statements, statement)
+
+		upper := strings.ToUpper(trimmed)
+		if strings.HasPrefix(upper, "CREATE TRIGGER") {
+			inTrigger = true
+		}
+
+		if inTrigger {
+			current.WriteString(line)
+			current.WriteString("\n")
+			if strings.HasPrefix(upper, "BEGIN") {
+				depth++
+			}
+			if strings.HasPrefix(upper, "END") {
+				depth--
+				if depth == 0 {
+					inTrigger = false
+					statements = append(statements, strings.TrimSpace(current.String()))
+					current.Reset()
+				}
+			}
+		} else {
+			current.WriteString(line)
+			current.WriteString("\n")
+			if strings.HasSuffix(trimmed, ";") {
+				statements = append(statements, strings.TrimSpace(current.String()))
+				current.Reset()
+			}
+		}
 	}
+
+	if current.Len() > 0 {
+		stmt := strings.TrimSpace(current.String())
+		if stmt != "" {
+			statements = append(statements, stmt)
+		}
+	}
+
 	return statements
 }