fix(home): un-clip CoverTile overlay so play button isn't cut off (#1495)

The play button overlaid on artist circles sat under the circular frame:
CoverTile clipped the Box that held both the artwork and the overlay, so
a BottomEnd button on a CircleShape avatar — which falls in the square's
corner, outside the circle — got clipped away.

Draw the overlay on an outer un-clipped Box; clip only the inner artwork
+ background to `shape`. Corner-anchored overlays (play button, variant
pill) now sit on top of the frame. Bounds/alignment unchanged, so Album
and Playlist tiles keep their layout (pill is padding-inset; their play
buttons are simply no longer clipped at the corner radius).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

android/app/src/main/java/com/fabledsword/minstrel/shared/widgets/CoverTile.kt

@@ -23,8 +23,12 @@ import com.fabledsword.minstrel.theme.FabledSwordFlatTokens
  * ServerImage + fallback structure was identical at all three sites.
  *
  * [overlay] is a `BoxScope` slot for things drawn on top of the cover
- * (e.g. the `VariantPill` system-playlist label) — callers can use
- * `Modifier.align(...)` inside it.
+ * (e.g. the `VariantPill` system-playlist label, the play button) —
+ * callers can use `Modifier.align(...)` inside it. The overlay sits on
+ * an outer, UN-clipped box so corner-anchored widgets are not cut off by
+ * [shape]: a `BottomEnd` play button on a `CircleShape` avatar falls in
+ * the square's corner, outside the circle, and would otherwise be clipped
+ * away. Only the artwork + background are clipped to [shape].
  */
 @Composable
 fun CoverTile(
@@ -38,18 +42,23 @@ fun CoverTile(
     overlay: @Composable BoxScope.() -> Unit = {},
 ) {
     Box(
-        modifier = modifier
-            .size(size)
-            .clip(shape)
-            .background(background),
+        modifier = modifier.size(size),
         contentAlignment = Alignment.Center,
     ) {
-        ServerImage(
-            url = url,
-            contentDescription = contentDescription,
-            modifier = Modifier.fillMaxSize(),
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .clip(shape)
+                .background(background),
+            contentAlignment = Alignment.Center,
         ) {
-            fallback()
+            ServerImage(
+                url = url,
+                contentDescription = contentDescription,
+                modifier = Modifier.fillMaxSize(),
+            ) {
+                fallback()
+            }
         }
         overlay()
     }