Always show full model description instead of a fragile truncate/expand toggle

The description Text sits inside ModelInfoView's ScrollView, where
Text with a lineLimit doesn't reliably compute wrapping/truncation
(a documented SwiftUI/AppKit quirk). Without a fixedSize hint it
hard-clipped mid-word with no ellipsis; adding one fixed that but
silently broke the "More…" button below it in the same VStack.

Removed the whole toggle instead of chasing further edge cases — the
modal already scrolls, so a long description just means more
scrolling. Separately confirmed via OpenRouter's public API that at
least one model's description is truncated server-side with no fuller
version available through any endpoint, so this was never going to
fully solve "show the complete description" for every model regardless.

oAI/Views/Screens/ModelInfoView.swift

@@ -28,7 +28,6 @@ struct ModelInfoView: View {
 
     @Environment(\.dismiss) var dismiss
     @Bindable private var settings = SettingsService.shared
-    @State private var isDescriptionExpanded = false
 
     var body: some View {
         VStack(spacing: 0) {
@@ -73,6 +72,13 @@ struct ModelInfoView: View {
                         infoRow("Released", releaseDate.formatted(date: .abbreviated, time: .omitted))
                     }
                     if let desc = model.description {
+                        // Always shown in full, no truncate/expand toggle — Text with a lineLimit
+                        // nested inside this view's ScrollView doesn't reliably compute wrapping/
+                        // truncation (a well-documented SwiftUI/AppKit quirk: without a fixedSize
+                        // hint it hard-clips mid-word with no ellipsis; with one, sibling views in
+                        // the same VStack — like the former "More…" button — can silently fail to
+                        // lay out). The modal itself already scrolls, so a long description just
+                        // means more scrolling, which sidesteps the whole bug class.
                         VStack(alignment: .leading, spacing: 6) {
                             Text("Description")
                                 .font(.subheadline.weight(.medium))
@@ -80,18 +86,7 @@ struct ModelInfoView: View {
                             Text(desc)
                                 .font(.body)
                                 .foregroundColor(.primary)
-                                .lineLimit(isDescriptionExpanded ? nil : 4)
                                 .textSelection(.enabled)
-                            if desc.count > 250 {
-                                Button(isDescriptionExpanded ? "Less" : "More…") {
-                                    withAnimation(.easeInOut(duration: 0.2)) {
-                                        isDescriptionExpanded.toggle()
-                                    }
-                                }
-                                .font(.callout)
-                                .foregroundStyle(.blue)
-                                .buttonStyle(.plain)
-                            }
                         }
                         .padding(.leading, 4)
                     }