Fix comments pill showing disabled appearance in comments view

The comments pill was appearing disabled in the comments view because it had no action handler. Updated the pill rendering logic to show static content (instead of a disabled button) when enabled but with no action, preventing the disabled styling from being applied.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: weiran

DesignSystem/Sources/DesignSystem/Components/PostDisplayView.swift

@@ -189,6 +189,7 @@ public struct PostDisplayView: View {
             accessibilityLabel: "\(post.commentsCount) comments",
             isHighlighted: false,
             isLoading: false,
+            isEnabled: true,
             numericValue: post.commentsCount,
             action: onCommentsTap
         )
@@ -370,16 +371,27 @@ public struct PostDisplayView: View {
             }
         }
 
-        return Button(action: action ?? {}) {
+        let shouldDisable = !isEnabled || isLoading
+        let shouldBeInteractive = isEnabled && !isLoading && action != nil
+
+        // If enabled but no action, render as static view to avoid disabled styling
+        if isEnabled && !isLoading && action == nil {
             content
+                .accessibilityElement(children: .combine)
+                .accessibilityLabel(accessibilityLabel)
+                .accessibilityHint(accessibilityHint ?? "")
+        } else {
+            Button(action: action ?? {}) {
+                content
+            }
+            .buttonStyle(.plain)
+            .disabled(!shouldBeInteractive)
+            .allowsHitTesting(shouldBeInteractive)
+            .opacity(shouldDisable ? 0.6 : 1.0)
+            .accessibilityElement(children: .combine)
+            .accessibilityLabel(accessibilityLabel)
+            .accessibilityHint(accessibilityHint ?? "")
         }
-        .buttonStyle(.plain)
-        .disabled(!isEnabled || isLoading || action == nil)
-        .allowsHitTesting(isEnabled && !isLoading && action != nil)
-        .opacity(isEnabled && !isLoading ? 1.0 : 0.6)
-        .accessibilityElement(children: .combine)
-        .accessibilityLabel(accessibilityLabel)
-        .accessibilityHint(accessibilityHint ?? "")
     }
 }