feat: add rendered notes view

notetaker/Views/RenderedNotesView.swift

@@ -0,0 +1,87 @@
+import SwiftUI
+
+struct RenderedNotesView: View {
+    let text: String
+    
+    var body: some View {
+        ScrollView {
+            VStack(alignment: .leading, spacing: 8) {
+                ForEach(text.split(separator: "\n"), id: \.self) { line in
+                    self.renderLine(String(line))
+                }
+            }
+            .padding()
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+    }
+    
+    @ViewBuilder
+    private func renderLine(_ line: String) -> some View {
+        let trimmed = line.trimmingCharacters(in: .whitespaces)
+        if trimmed.isEmpty {
+            EmptyView()
+        } else if let level = headingLevel(for: trimmed) {
+            let content = String(trimmed.dropFirst(level + 1)).trimmingCharacters(in: .whitespaces)
+            Text(content)
+                .font(.system(size: CGFloat(28 - level * 4), weight: .bold))
+                .foregroundColor(.white)
+                .frame(maxWidth: .infinity, alignment: .leading)
+        } else if let (indentLevel, bullet, content) = listItemInfo(for: line) {
+            HStack(alignment: .firstTextBaseline, spacing: 4) {
+                Text(bullet)
+                    .foregroundColor(.gray)
+                Text(content)
+                    .foregroundColor(.gray)
+            }
+            .padding(.leading, CGFloat(indentLevel * 15))
+        } else {
+            Text(trimmed)
+                .foregroundColor(.primary)
+        }
+    }
+    
+    private func headingLevel(for line: String) -> Int? {
+        guard line.hasPrefix("#") else { return nil }
+        var count = 0
+        for char in line {
+            if char == "#" {
+                count += 1
+            } else if char == " " {
+                return count
+            } else {
+                return nil
+            }
+        }
+        return nil
+    }
+    
+    private func listItemInfo(for line: String) -> (indentLevel: Int, bullet: String, content: String)? {
+        let leadingSpaces = line.prefix(while: { $0 == " " }).count
+        let indentLevel = leadingSpaces / 2
+        
+        let remaining = String(line.dropFirst(leadingSpaces))
+        
+        if remaining.hasPrefix("- ") {
+            return (indentLevel, getBullet(for: indentLevel), String(remaining.dropFirst(2)).trimmingCharacters(in: .whitespaces))
+        } else if remaining.hasPrefix("* ") {
+            return (indentLevel, getBullet(for: indentLevel), String(remaining.dropFirst(2)).trimmingCharacters(in: .whitespaces))
+        } else if let dotIndex = remaining.firstIndex(of: "."), let num = Int(remaining[remaining.startIndex..<dotIndex]), remaining[dotIndex..<remaining.endIndex].hasPrefix(". ") {
+            let contentStart = remaining.index(dotIndex, offsetBy: 2)
+            return (indentLevel, "\(num).", String(remaining[contentStart...]).trimmingCharacters(in: .whitespaces))
+        }
+        return nil
+    }
+    
+    private func getBullet(for level: Int) -> String {
+        switch level % 3 {
+        case 0: return "•"
+        case 1: return "◦"
+        case 2: return "▪︎"
+        default: return "-"
+        }
+    }
+}
+
+#Preview {
+    RenderedNotesView(text: "# Heading 1\n## Heading 2\n- List item\n  - Nested item\n    - Deeper item\n1. Ordered\n  1. Nested ordered\nNormal text")
+}