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fix/6116-javascript-application-fs-errors
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morluto b27e1a74c9 docs(i18n): complete Malayalam locale registration and links 
Resolve eight nested README links from their owning directory. Preserve the
shared README/website inventory contract by registering Malayalam with an
explicitly untranslated catalog and the existing visible, noindex English
fallback. Regenerate the shared website navigation and catalog references.
Existing parsed translations remain unchanged.

Validation: docs check, full website check (401 HTML pages, 27790 local
references, 19 tests), all 19 generated Malayalam fallback pages, and two
source reviews. No Malayalam website translation or browser layout claim.

Fixes #4821
2026-10-17 23:39:40 +08:00

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<h1>REA case studies.</h1>
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Android, games, Electron and a CTF challenge, with code, figures and
checked results.
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<div class="guide-index">
<section class="guide-entry">
<p class="eyebrow">Android · APK analysis</p>
<div>
<h2>How an authenticator generates a login code</h2>
<p>
Find Aegis's six-digit code calculation in its released APK. Trace
the generating methods with REA, then move a demo clock to see why
the code changes every 30 seconds.
</p>
<div class="guide-route">
<span>APK</span> <b aria-hidden="true">→</b>
<span>Generating code</span> <b aria-hidden="true">→</b>
<span>Recovered rule</span> <b aria-hidden="true">→</b>
<span>Adjustable clock</span>
</div>
<a class="text-link" href="aegis/">Read the Android case study</a>
</div>
</section>
<section class="guide-entry">
<p class="eyebrow">CTF · Native analysis</p>
<div>
<h2>Solve a CTF flag checker</h2>
<p>
Inspect an easy DownUnderCTF challenge with REA. Find its checking
functions, turn masks and sums into equations, then verify the
solved flag with the original program.
</p>
<div class="guide-route">
<span>Binary</span> <b aria-hidden="true">→</b>
<span>Checking code</span> <b aria-hidden="true">→</b>
<span>Equations</span> <b aria-hidden="true">→</b>
<span>Correct!</span>
</div>
<a class="text-link" href="ctf/">Read the CTF case study</a>
</div>
</section>
<section class="guide-entry">
<p class="eyebrow">Native · Reconstruction</p>
<div>
<h2>DX-Ball's sound-pan calculation</h2>
<p>
Recover a sound-pan calculation from a 1996 Windows game. REA's
instructions, caller references and numeric constants lead to a
small C function, checked against the original behavior and all 63
compiled bytes.
</p>
<div class="guide-route">
<span>Executable</span> <b aria-hidden="true">→</b>
<span>REA findings</span> <b aria-hidden="true">→</b>
<span>Recovered C</span> <b aria-hidden="true">→</b>
<span>Validation</span>
</div>
<a class="text-link" href="dx-ball/">Read the DX-Ball case study</a>
</div>
</section>
<section class="guide-entry">
<p class="eyebrow">Electron · Feature tracing</p>
<div>
<h2>How Notion copies text and HTML</h2>
<p>
Trace a page-facing API through Notion's packaged JavaScript.
Follow its IPC wrappers to the system clipboard, then see how a
small HTML marker keeps rich block data connected to a copy.
</p>
<div class="guide-route">
<span>Packaged app</span> <b aria-hidden="true">→</b>
<span>Exposed API</span> <b aria-hidden="true">→</b>
<span>IPC wrappers</span> <b aria-hidden="true">→</b>
<span>Clipboard</span>
</div>
<a class="text-link" href="notion/">Read the Notion case study</a>
</div>
</section>
<section class="guide-entry">
<p class="eyebrow">PC-98 DOS · Reconstruction</p>
<div>
<h2>How TH04 aims a ring of bullets</h2>
<p>
Inspect the original 16-bit angle helper with REA. Match its
multiply, divide and coordinate operations to readable C++, then
see how they produce a ring aimed at the player.
</p>
<div class="guide-route">
<span>Original DOS code</span> <b aria-hidden="true">→</b>
<span>REA instructions</span> <b aria-hidden="true">→</b>
<span>Angle calculation</span> <b aria-hidden="true">→</b>
<span>Bullet ring</span>
</div>
<a class="text-link" href="th04/">Read the TH04 case study</a>
</div>
</section>
</div>
<section class="article-section">
<h2>Step-by-step guides</h2>
<p>
The guides walk through a native calculation, an Electron export and a
browser request. Each starts with a prompt and a concrete target.
</p>
<a class="text-link" href="../guides/">Read the guides</a>
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