feat: binary glow effects, refined drawings and calls to action

Dark surfaces now carry light: frames glow along their edge and shed binary
digits (BitAura), dark sections open with a lit seam (BitSeam), the career
path is a line of light and "My work" became a dark stage. Buttons carry a
travelling light and a spot that follows the pointer (BitGlow).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/components/bits/BitSeam.tsx

@@ -0,0 +1,17 @@
+import * as React from "react";
+import { BitAura } from "./BitAura";
+
+/**
+ * BitSeam: a lit top edge for a dark section, with digits drifting down from it.
+ * The section needs `relative` and has to clip its overflow.
+ */
+export const BitSeam: React.FC<{ density?: number }> = ({ density = 0.4 }) => (
+  <div
+    className="pointer-events-none absolute inset-x-0 top-0"
+    aria-hidden="true"
+  >
+    <BitAura source="bottom" tone="dark" radius={0} density={density}>
+      <div className="h-0" />
+    </BitAura>
+  </div>
+);