fix(tools): correct lightdom css routing, improve trailing slash behavior #10653

Job	Run time
Unit Tests (Web Test Runner)	1m 37s
Lint files	37s
SSR Tests (Playwright)	1m 26s
Compile project (24)	58s
Verify that build runs on Windows	1m 31s
Compile project (22)	1m 4s
Publish Playwright Report	59s
Validate successful build on main	3s
	8m 15s

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