M8: clamp Dynamic Type at ScarfGo scene root

ScarfGo is a developer tool that benefits from tighter defaults
than Apple's spacious baseline, but shouldn't lock out users who
need accessibility sizes. `.dynamicTypeSize(.xSmall ... .accessibility2)`
at the WindowGroup gives both: compact-first layout, still scalable
to ~XL accessibility for low-vision users.

Going past .accessibility2 collapses multi-column rows and forces
text truncation in ScarfGo's dense list layouts — not a win for
anyone. Matches Use-Your-Loaf's "Restricting Dynamic Type Sizes"
guidance from the M8 density research.

One-line change ahead of the TabView migration (2.2) so every
subsequent UX-density decision factors in the clamped range.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scarf/Scarf iOS/App/ScarfIOSApp.swift

@@ -51,6 +51,17 @@ struct ScarfIOSApp: App {
         WindowGroup {
             RootView(model: root)
                 .task { await root.load() }
+                // Clamp Dynamic Type at the scene root. ScarfGo is a
+                // developer tool that needs more density than Apple's
+                // .xxxLarge default, but we still scale from .xSmall
+                // to .accessibility2 so users who need larger text can
+                // get it without breaking the layout. Going past
+                // .accessibility2 (~XL accessibility) collapses
+                // multi-column rows and forces text truncation — not
+                // a win for anyone. Cross-checked against
+                // Use-Your-Loaf's "Restricting Dynamic Type Sizes"
+                // guidance (M8 density research).
+                .dynamicTypeSize(.xSmall ... .accessibility2)
         }
     }
 }