🐛 fix(tsl-syntax-reference): repair routing for colloquial queries

- split 03's overloaded 字符串边界规则: substring read/replace/delete/insert
  now sit in 字符串子串读写 with their own tags, so `截取子串` / `子串` /
  `字符串区间` stop returning only weak candidates, which SKILL.md tells the
  agent to treat as a fact gap even though the fact is on the page
- tag the remaining 03 section for wide strings, encoding conversion and
  binary buffers; those queries used to land on the neighbouring concat
  section, or on 23's binary-function overload
- add 异常处理 to 07's try-except and rename 21's H3 to 无效输入替换参数: the
  matrix ErrDefine section owned that phrase and outranked try-except by
  92 to a weak 11, while its own text says NAN is not an error position
- tag 03's like section for 正则表达式 and 08 for 调用父类方法 / 定义类; all
  three reached the wrong section on the right page, and 定义类 could not
  reach 最小类与声明位置 at all because the per-page cap was already full
- drop the redundant 可直接照写示例 under 03's 禁止项 and state the closed
  interval rule as a bullet instead; a positive example does not belong in
  the prohibition list

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

skills/tsl-syntax-reference/references/07_control_flow.md

@@ -305,7 +305,7 @@ mid
 
 ### `try ... except`
 
-<!-- tags: 捕获异常, 出错处理, 抓错误, 异常不中断 -->
+<!-- tags: 捕获异常, 异常处理, 出错处理, 抓错误, 异常不中断 -->
 
 代码块身份：可直接照写示例