fix(qt6): fix text clipping in badges, add hero spacing

- CText: use ProportionalHeight for all variants (FixedHeight with 1.0 = 1px, clips text)
- FrontPage: 8px top spacer, hero height 400px, content offset +16px for breathing room
- Text centered in badge circles no longer cut off

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontends/qt6/FrontPage.qml

@@ -85,12 +85,15 @@ Rectangle {
             width: parent.width
             spacing: 0
 
+            // Top breathing room
+            Item { Layout.preferredHeight: 8 }
+
             // ════════════════════════════════════════════════════════
             // HERO
             // ════════════════════════════════════════════════════════
             Rectangle {
                 Layout.fillWidth: true
-                Layout.preferredHeight: 380
+                Layout.preferredHeight: 400
                 color: "transparent"
 
                 // Blue gradient wash
@@ -104,7 +107,9 @@ Rectangle {
                 }
 
                 ColumnLayout {
-                    anchors.centerIn: parent
+                    anchors.horizontalCenter: parent.horizontalCenter
+                    anchors.verticalCenter: parent.verticalCenter
+                    anchors.verticalCenterOffset: 16
                     width: Math.min(parent.width - 80, 720)
                     spacing: 16
 

qml/components/atoms/CText.qml

@@ -73,9 +73,9 @@ Text {
 
     font.family: mono ? Theme.fontFamilyMono : Theme.fontFamily
 
-    // Only body1 gets expanded line height; everything else stays compact
+    // Only body1 gets expanded line height
     lineHeight: variant === "body1" ? 1.4 : 1.0
-    lineHeightMode: variant === "body1" ? Text.ProportionalHeight : Text.FixedHeight
+    lineHeightMode: Text.ProportionalHeight
 
     // Default to no wrap — callers opt in with wrapMode: Text.Wrap
     wrapMode: truncate ? Text.NoWrap : Text.NoWrap