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]>

packages/contracts/src/policy.ts

@@ -807,7 +807,7 @@ export const RuleExpr = z
     args: z.array(JsonObject).optional(),
   })
   .refine(isRuleExpr, {
-    message: "条件表达式结构不对:{op:atom,id} / {op:not,arg} / {op:and|or,args[]}",
+    message: "条件表达式结构不对：{op:atom,id} / {op:not,arg} / {op:and|or,args[]}",
   }) as unknown as z.ZodType<RuleExpr>;
 
 /** 优先级阶梯的一层;第 k 层(0 起)命中 pri = 100 - k */