## Summary
* **What is the goal of this PR?** Prevent heap memory exhaustion caused
by thousands of machine-generated anchor IDs injected by epub converters
like Kobo KePub.
* Fix#2292.
* **What changes are included?**
* **Element-type filter (Layer 1):** Introduced the
`isNonNavigableInlineElement()` function in `ChapterHtmlSlimParser.cpp`
to automatically skip recording IDs on `<span>` elements, as they are
purely inline wrappers used for tracking and lack navigable meaning.
* **Hard cap (Layer 2):** Added the `MAX_ANCHORS_PER_CHAPTER = 1024`
constant to act as a fallback safety net against unbounded heap growth
from unknown future ID-injection patterns on non-span elements.
* **TOC Safety net:** Ensured that IDs matching known Table of Contents
(TOC) entries explicitly bypass both the `<span>` filter and the
1024-anchor cap, guaranteeing that chapter page-break and core
navigation logic are never compromised.
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### AI Usage
While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.
Did you use AI tools to help write this code? _**< PARTIALLY >**_
Uri Tauber
2ea042a68a