style(copy): fix remaining punctuation violations and make check:copy strict

Auto-fix of 602 string literals across 74 files (half-width punctuation next to
Chinese, parenthesised Chinese, quotes); biome reflow; e2/e6 assertions follow
the new full-width summaries. check:copy now runs with --strict in ci.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/agent/agent-subagent-tree.tsx

@@ -66,7 +66,7 @@ function Node({ node, byParent, depth }: { node: AgentRunNode; byParent: Map<str
             </span>
           </div>
           {node.spawnReason ? (
-            <p className="mt-0.5 truncate text-meta text-muted-foreground">理由:{node.spawnReason}</p>
+            <p className="mt-0.5 truncate text-meta text-muted-foreground">理由：{node.spawnReason}</p>
           ) : null}
         </div>
       </div>
@@ -107,9 +107,9 @@ export function SubagentTree({ snapshot }: { snapshot: RunSnapshot }) {
             {splitContextGoal(parent.goal).text}
           </Link>
           <p className="text-meta text-muted-foreground">
-            第 {run.depth} 层子会话 · 继承父会话的发起人与授权上限 · 能力 {caps} 项(⊆ 父会话)· 划拨预算{" "}
+            第 {run.depth} 层子会话 · 继承父会话的发起人与授权上限 · 能力 {caps} 项（⊆ 父会话）· 划拨预算{" "}
             {budgetText(run.budget as Record<string, number | undefined>)}
-            {run.spawnReason ? ` · 理由:${run.spawnReason}` : ""}
+            {run.spawnReason ? ` · 理由：${run.spawnReason}` : ""}
           </p>
         </div>
       ) : null}