{"id":"ad300a51-2ec9-41ff-bcba-b08d148ef3e7","version_id":"56dd8045-06cf-46d2-84a7-8440d8793a9f","reporter":"mathviz-bug-archive","bug_summary":"[bug-2] 沙箱 UX 差: 用户写 0.5 报 '函数包含非法字符'","root_cause":"_safeCompile 白名单禁所有 '.'，用户写裸数字小数 (0.5, -0.5, 3.14) 都被拒","fix_plan":"✓ 已修 (commit 54b8b80): 沙箱分两步 — 1) Math.X 替换为占位符 2) 数字字面量中的小数点替换为占位符；白名单过；编译时恢复。29/29 unit + 10/10 E2E 全过。","severity":"medium","status":"fixed","decision":"keep_as_is","reused_in_projects":[],"decided_at":"2026-06-22T02:02:22.043517","created_at":"2026-06-22T02:00:05.534208","requirement_id":null}