fix(sandbox): support conditional request injections

[miclle]

Summary

• add sandbox request injection types for baseUrl, ifHeaders, and ifQueries
• normalize camelCase conditional injection fields before sending API requests
• fix Qiniu-auth GET signing for bodyless sandbox requests by aligning the default content type
• update injection examples, changelog, and type/unit coverage

Validation

• npm run test:sandbox
• npm run check-type
• npx eslint qiniu/sandbox/client.js test/sandbox_client.test.js examples/sandbox_injection_rules.js examples/sandbox_request_injections.js
• NODE_ENV=test npx mocha -t 600000 --retries 0 test/sandbox_integration.test.js
• node examples/sandbox_request_injections.js
• node examples/sandbox_injection_rules.js

[gemini-code-assist]

Code Review

This pull request adds support for baseUrl path prefix matching, as well as ifHeaders and ifQueries condition matching for sandbox request injections. It updates the TypeScript type definitions, client normalization logic, examples, and test coverage. It also ensures that the Content-Type header is removed for GET and HEAD requests without a body to allow correct default signing. There are no review comments, and I have no additional feedback to provide.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.44%. Comparing base (32685e9) to head (e543aa8).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #452      +/-   ##
==========================================
+ Coverage   93.41%   93.44%   +0.02%     
==========================================
  Files          14       14              
  Lines        2006     2014       +8     
==========================================
+ Hits         1874     1882       +8     
  Misses        132      132              

Files with missing lines	Coverage Δ
qiniu/sandbox/client.js	97.09% <100.00%> (+0.09%)	⬆️

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[fennoai]

No issues found in this review.

Local verification note: npm run check-type could not run because tsc is not executable in this workspace, and the focused mocha command could not run because node_modules/.bin/mocha is absent.