mod: adjust layout and style of widgets and header links

src/widget/Header.zig

@@ -66,6 +66,10 @@ fn fillView(this: *@This()) void {
         const cell: vaxis.Cell = .{
             .link = .{ .uri = "https://github.com/yves-biener" },
             .char = .{ .grapheme = "github" },
+            .style = .{
+                .fg = .{ .index = 3 },
+                .ul_style = .single,
+            },
         };
         this.view.?.writeCell(this.view.?.screen.width - 9, 0, cell);
     }
@@ -74,6 +78,10 @@ fn fillView(this: *@This()) void {
         const cell: vaxis.Cell = .{
             .link = .{ .uri = "mailto:yves.biener@gmx.de" },
             .char = .{ .grapheme = "mail" },
+            .style = .{
+                .fg = .{ .index = 3 },
+                .ul_style = .single,
+            },
         };
         this.view.?.writeCell(this.view.?.screen.width - 16, 0, cell);
     }