Add game deletion with authorization check

- Add Delete method to GameStore and Persister interface
- Add delete button to game list on home page
- Verify user owns game before allowing deletion
- Use status constants instead of magic numbers
- Remove unused variable in persister

main.go

@@ -82,6 +82,18 @@ func main() {
 			c.Redirectf("/game/%s", gi.ID())
 		})
 
+		deleteGame := func(id string) h.H {
+			return c.Action(func() {
+				for _, g := range userGames {
+					if g.ID == id {
+						store.Delete(id)
+						break
+					}
+				}
+				c.Redirect("/")
+			}).OnClick()
+		}
+
 		c.View(func() h.H {
 			return ui.LobbyView(
 				nickname.Bind(),
@@ -91,6 +103,7 @@ func main() {
 				username,
 				logout.OnClick(),
 				userGames,
+				deleteGame,
 			)
 		})
 	})
@@ -527,13 +540,11 @@ const gameCSS = `
 
 	.game-entry {
 		display: flex;
-		justify-content: space-between;
 		align-items: center;
-		padding: 0.75rem 1rem;
+		gap: 0.5rem;
+		padding: 0.5rem;
 		background: var(--pico-muted-background);
 		border-radius: 8px;
-		text-decoration: none;
-		color: inherit;
 		transition: background 0.2s;
 	}
 
@@ -541,12 +552,41 @@ const gameCSS = `
 		background: var(--pico-secondary-background);
 	}
 
+	.game-entry-link {
+		flex: 1;
+		display: flex;
+		justify-content: space-between;
+		align-items: center;
+		padding: 0.25rem 0.5rem;
+		text-decoration: none;
+		color: inherit;
+	}
+
 	.game-entry-main {
 		display: flex;
 		flex-direction: column;
 		gap: 0.25rem;
 	}
 
+	.game-delete-btn {
+		width: 2rem;
+		height: 2rem;
+		padding: 0;
+		margin: 0;
+		border: none;
+		background: transparent;
+		color: var(--pico-muted-color);
+		font-size: 1.25rem;
+		cursor: pointer;
+		border-radius: 4px;
+		transition: background 0.2s, color 0.2s;
+	}
+
+	.game-delete-btn:hover {
+		background: #dc2626;
+		color: white;
+	}
+
 	.opponent-name {
 		font-weight: bold;
 	}