Weapons built from traits, fashion, Hourglass, About tab, and Ithaca

- Every attack is now assembled from traits on its definition instead
  of per-weapon code: an anchor and path (thrusts, out-and-back, arcs),
  shared flight physics (gravity, drag, acceleration, homing, and one
  wall response: end, burst, stick, crawl, bounce, stop, pass, return,
  latch), and flags like bouncy, drifting, tethered, orbiting, instant
  and arming. Melee are projectiles too.
- Shots have a lifetime and a fade (when damage bottoms out). Range is
  speed times lifetime. Ricochets and the Vacuum wind lifetime back.
- The Vacuum pulls anyone's shots, and its airblast flips them out
  along the aim, claiming enemies' (fading into your colour).
- New trinket: Hourglass, longer projectile lifetime and range. Ropes
  and chains lengthen with it and the Accelerator.
- Fashion: 23 items worn on the head, face or torso, chosen in Profile.
- Flamethrower flames hit continuously, the whip coils and sweeps,
  bouncing shots roll over ramps, and Ricochet relights grenade fuses.
- Profile tab, colour tooltips, option hints on every setting, an
  About tab with credits and links, and the Ithaca font.
- Loadouts lock once readied, tomatoes clear with the match, and the
  round-over pause is 4 seconds.
- CC0 license. Tools and CLAUDE.md are no longer tracked, and the web
  shell moves to web/.

web/web_shell.html

@@ -0,0 +1,29 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>Smack a Brother</title>
+<style>
+    html, body { margin: 0; height: 100%; background: #000; overflow: hidden; }
+    canvas { display: block; width: 100%; height: 100%; image-rendering: pixelated; outline: none; }
+    #status { position: fixed; inset: 0; display: grid; place-items: center; color: #fff; font: 16px monospace; }
+</style>
+</head>
+<body>
+<div id="status">Loading...</div>
+<canvas id="canvas" tabindex="-1" oncontextmenu="event.preventDefault()"></canvas>
+<script>
+    var Module = {
+        canvas: document.getElementById("canvas"),
+        setStatus: function (text) {
+            var status = document.getElementById("status");
+            status.textContent = text;
+            status.style.display = text ? "grid" : "none";
+        },
+    };
+    Module.setStatus("Loading...");
+</script>
+{{{ SCRIPT }}}
+</body>
+</html>