Round two of the outside eye: contrast, scale, and travel

The whiff darkens to slate and sweeps longer; the portal-cell opens
a dark void behind its collapsing rings — an opening in space, not a
selected square; the tacks grow half again and recoil harder; the
streak's reveal slows so the travel reads even in a sampled frame;
dust lifts its contrast a step without turning heavy. The sector
ghosts stay board-machinery on purpose — the reviewer allowed it,
and the maze grinding IS an operation, not a spell.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/web/src/fx-sprites/TacksOw.svelte

@@ -14,8 +14,8 @@
 {#each TACKS as t (t.cls)}
   <g transform={`translate(${c.x + t.x} ${c.y + t.y}) rotate(${t.rot})`}>
     <g class={`tack ${t.cls}`}>
-      <circle cx="0" cy="2.5" r="2.6" class="head" />
-      <path d="M -1.4 1 L 0 -5 L 1.4 1 z" class="spike" />
+      <circle cx="0" cy="3.8" r="3.9" class="head" />
+      <path d="M -2.1 1.5 L 0 -7.5 L 2.1 1.5 z" class="spike" />
     </g>
   </g>
 {/each}
@@ -34,10 +34,10 @@
   .tack.late { animation-delay: 0.1s; }
   .tack.later { animation-delay: 0.2s; }
   @keyframes tack-hop {
-    0% { opacity: 0; transform: translateY(3px); }
-    25% { opacity: 1; transform: translateY(-6px); }
-    55% { transform: translateY(-1px); }
-    75% { transform: translateY(-4px); }
-    100% { opacity: 0; transform: translateY(-1px); }
+    0% { opacity: 0; transform: translateY(4px); }
+    22% { opacity: 1; transform: translateY(-10px); }
+    50% { transform: translateY(-2px); }
+    72% { transform: translateY(-7px); }
+    100% { opacity: 0; transform: translateY(-2px); }
   }
 </style>