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]>

deno.json

@@ -83,7 +83,7 @@
     "check:tokens": "cd apps/web && deno task check:tokens",
     "check:copy": {
       "description": "文案标点检查(规范见 docs/design/glossary.md「标点」);--fix 自动修正,--strict 有违规即失败",
-      "command": "deno run -A scripts/check-copy-punctuation.mjs"
+      "command": "deno run -A scripts/check-copy-punctuation.mjs --strict"
     },
     "build": "cd apps/web && deno task build && cd ../server && deno task compile",
     "ci": "deno task typecheck && deno task lint && deno task test && deno task check:tokens && deno task check:copy && deno task build",