Fix double write when refusing hidden files in contents handler #1585
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Fix double write when refusing hidden files in contents handler
When a request targets a hidden file or directory and
allow_hiddenis false,the contents handler finishes a 404 response but continues execution and later
attempts to write again. This results in a secondary
RuntimeError: Cannot write() after finish().This change adds an early return after finishing the error response, preventing
further processing and avoiding the double write, without changing behavior.
Fixes #1563