fix: localEcho exclude program config type defense

[life2015]

Types

Fix: 某些奇怪的情况下 用户会无意中把这个字段设置成字符串 导致终端crash

• 🐛 Bug Fixes

Background or solution

用户反馈终端不可用，排查发现是 localEchoExcludePrograms.map 不可用导致的。然后发现设置中此项变成了字符串，因此需要做个防御。

Changelog

• add localEcho exclude program config type defense

[codecov]

Codecov Report

Base: 57.62% // Head: 57.61% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (0b5d1e2) compared to base (742d745).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1800      +/-   ##
==========================================
- Coverage   57.62%   57.61%   -0.01%     
==========================================
  Files        1285     1285              
  Lines       80171    80175       +4     
  Branches    16793    16796       +3     
==========================================
- Hits        46198    46195       -3     
- Misses      30903    30909       +6     
- Partials     3070     3071       +1     

Flag	Coverage Δ
jsdom	52.36% <0.00%> (-0.01%)	⬇️
node	15.90% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...kages/terminal-next/src/browser/terminal.client.ts	72.77% <0.00%> (-0.85%)	⬇️
packages/utils/src/buffer.ts	33.13% <0.00%> (-1.75%)	⬇️

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