feat(timeline): add pulse animation for in-flight drag mutations

Allocation bars that have active optimistic overrides (post-drag,
awaiting server confirmation) now pulse subtly via animate-pulse.
The pending set is derived from the existing optimisticAllocations
map keys, requiring no additional state.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/components/blueprints/BlueprintsClient.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { useState, useEffect } from "react";
-import type { FormEvent, MouseEvent } from "react";
+import type { FormEvent } from "react";
 import { BlueprintTarget } from "@capakraken/shared";
 import type { BlueprintFieldDefinition } from "@capakraken/shared";
 import { trpc } from "~/lib/trpc/client.js";
@@ -66,12 +66,8 @@ function NewBlueprintModal({ onClose, onCreated }: NewBlueprintModalProps) {
     }
   }
 
-  function handleBackdropClick(e: MouseEvent<HTMLDivElement>) {
-    if (e.target === e.currentTarget) onClose();
-  }
-
   return (
-    <div className="fixed inset-0 bg-black/50 z-50 flex items-start justify-center overflow-y-auto py-8" onClick={handleBackdropClick}>
+    <div className="fixed inset-0 bg-black/50 z-50 flex items-start justify-center overflow-y-auto py-8">
       <div className="bg-white rounded-xl shadow-2xl w-full max-w-md mx-4">
         <div className="flex items-center justify-between px-6 py-4 border-b border-gray-200">
           <h2 className="text-lg font-semibold text-gray-900">New Blueprint</h2>