fix(decode): prevent infinite recursion and add test #75
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The 'decode' function in 'src/js/util.js' was vulnerable to infinite recursion with certain malformed URI strings. It also failed to decode some valid URI-encoded strings.
This commit replaces the recursive implementation with an iterative 'while' loop. This is a more robust way to handle repeated decoding and prevents stack overflow errors.
A new test case has been added to 'tools/test_decode.js' to verify the fix. The test fails before the fix and passes after, proving the bug is resolved.