Handle Unicode control characters in JSON strings

[deonx03]

Description

Bruno's JSON response preview decoded \u0022 escape sequences to a literal " but didn't re-escape it when rendering, producing output that looked like invalid JSON (e.g. "say "hello"") even though the underlying server response was valid.

This PR re-escapes embedded double quotes during rendering so the preview stays valid JSON.

Changes Made

• decode-escaped-unicode.js: Re-escape double quotes produced by decoding \u0022, so the output stays valid JSON.
• escaped.spec.js: Added test for adding escape when \u0022 is encountered

Fixes

#6

[deonx03]

Added safeUnicodeDecode to generalise the earlier quote-escaping fix into full JSON-safe output. Previously, decoding sequences like \u0008 or \u000a inserted raw control bytes (backspace, newline, etc.) into the output, producing invalid JSON. This now re-escapes all of JSON's mandatory escapes — ", \ , and the named control chars ( \b \f \n \r \t ) — and falls back to \uXXXX for any other control character (U+0000–U+001F).

AI used:

• Claude Code

A feedback is welcome @helloanoop. (I am new to this Creating a pull request for a repo I don't own or control)