fix: correctly parse and route absolute anchor URLs in Interactive Book

[RAJEEVTIWARI8052]

Fixes #556

###changes made in this PR:

• Replaced the string-based prefix comparison logic (startsWith) with robust Uri parsing and path normalization in lib/ui/views/ib/ib_page_view.dart.
• Accurately implemented Uri.decodeComponent extraction for internal Markdown anchor fragments (#) instead of incorrectly truncating the absolute URL string (href.substring(1)).
• Prevented double-launching and unhandled external navigation of URLs by appropriately using isSameDocument checks and explicitly returning out of the logic blocks to satisfy static analysis and automated PR bot feedback.

Why these changes were necessary:

The previous Interactive Book routing logic incorrectly assumed that any absolute URL corresponding to the current document could simply have its first character stripped (href.substring(1)). This meant any internal same-page anchor link would be resolved to an invalid slug (e.g., ttps://learn.circuitverse...) and fail to scroll. Furthermore, the startsWith logic suffered from prefix fallback errors (where /chapter-1 could incorrectly flag /chapter-10 as a self-link). By parsing the exact URI schemes, paths, and fragment identifiers, all Interactive Book navigation correctly scopes and scrolls precisely to specific headings.

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[coderabbitai]

Walkthrough

The change updates _onTapLink to parse both the current page URL and the tapped href as Uri, normalizing trailing slashes, and to distinguish same-document anchor navigation from other IB base-URL links. It adds a direct equality guard (href == _model.pageData!.pageUrl) to no-op, decodes non-empty fragments and scrolls to matching anchors when scheme/host/path match, and preserves scrolling for href values starting with #. The prior startsWith-based base-URL scroll fallback and its substring-based scrolling behavior were removed; non-matching base-URL taps call launchURL(href).

Suggested labels

potential-ai-slop

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change in the pull request, which involves fixing the parsing and routing of anchor URLs in the Interactive Book feature by updating the _onTapLink method.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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[coderabbitai]

Actionable comments posted: 1

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ℹ️ Review info

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• lib/ui/views/ib/ib_page_view.dart

[RAJEEVTIWARI8052]

i have resolved the issue raised

[coderabbitai]

Actionable comments posted: 1

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• lib/ui/views/ib/ib_page_view.dart
• pubspec.yaml

✅ Files skipped from review due to trivial changes (1)

• pubspec.yaml

[RAJEEVTIWARI8052]

Hey @JatsuAkaYashvant I have pushed the fixes for this issue. Could you please take a look when you have a free moment? Thanks!