fix: resolve 8 bugs + bump version to 1.2.2

Android build (#5):
- Add subprojects compileSdk=35 override in example/android/build.gradle.kts
  to fix irondash_engine_context vs androidx.fragment:1.7.1 mismatch

SVG invisible with sanitize:true (html_sanitizer.dart):
- Add atomic SVG sanitization path (_sanitizeSvgElement, _sanitizeSvgAttributes)
  preserving structural elements while stripping scripts/dangerous attrs

HyperRenderConfig equality (hyper_render_config.dart):
- Add operator== and hashCode to prevent identity-compare re-layouts on
  every frame when _effectiveConfig merges keyframes into a new object

selectable toggle ignored after build (hyper_viewer.dart):
- Create/dispose VirtualizedSelectionController in didUpdateWidget when
  selectable prop changes

Deep-link tap silently blocked (hyper_viewer.dart):
- _safeOnLinkTap now checks both allowedCustomSchemes AND
  renderConfig.extraLinkSchemes

CSS change did not invalidate section cache (hyper_viewer.dart):
- Reset _sectionHashes in didUpdateWidget when customCss changes

Markdown/Delta single-section in virtualized/paged mode (hyper_viewer.dart):
- Add _splitIntoSections() helper; sync fallback now chunks at block boundaries

renderConfig change only partially detected (hyper_viewer.dart):
- didUpdateWidget uses full renderConfig != instead of only virtualizationChunkSize

CSS float class names not detected (html_adapter.dart):
- _containsFloatChild now recognises Bootstrap/Tailwind float class patterns

Misc:
- Fix unused element _containsPositionAbsoluteOrFixed in html_heuristics.dart
- Add .pubignore entries for archive/, coverage/, .metadata, pubspec_dev.yaml
- dart format all changed files

Author: vietnguyentuan2019

.pubignore

@@ -43,6 +43,16 @@ scripts/
 # Internal publish helpers
 pubspec.yaml.backup
 pubspec_publish_ready.yaml
+pubspec_dev.yaml
+
+# Flutter .metadata files (auto-generated, not useful to consumers)
+.metadata
+
+# Internal archive / historical comparison docs
+archive/
+
+# Coverage artifacts
+coverage/
 
 # IDE files
 *.iml

CHANGELOG.md

@@ -1,10 +1,17 @@
 # Changelog
 
-## [1.2.2] - 2026-04-01
+## [1.2.2] - 2026-04-02
 
 ### 🐛 Bug Fixes
 
 - **Android build failure with modern compileSdk** (`example/android/build.gradle.kts`): `irondash_engine_context 0.5.5` was compiled against android-31 but its transitive `androidx.fragment:1.7.1` dependency has `minCompileSdk=34`, causing AGP 8's `checkAarMetadata` to block the build. Added a `subprojects { afterEvaluate { compileSdk = 35 } }` override in the example's root Gradle file. README now documents the same one-line workaround for app-level projects. ([#5](https://github.com/brewkits/hyper_render/issues/5))
+- **SVG invisible with `sanitize: true`** (`html_sanitizer.dart`): `<svg>` was not in `defaultAllowedTags` so the sanitizer unwrapped it, destroying the SVG structure. Added an atomic SVG sanitization path that strips `<script>` and dangerous attributes while preserving all structural SVG elements (`path`, `circle`, `g`, `use`, etc.).
+- **`selectable` toggle ignored after build** (`hyper_viewer.dart`): Toggling `selectable` from `false` → `true` never created `VirtualizedSelectionController`, and `true` → `false` never disposed it. Fixed in `didUpdateWidget`.
+- **Deep-link tap silently blocked** (`hyper_viewer.dart`): `_safeOnLinkTap` only checked `widget.allowedCustomSchemes` but ignored `renderConfig.extraLinkSchemes`, causing deep-links registered via `HyperRenderConfig` to be silently dropped. Both sources are now consulted.
+- **CSS change didn't invalidate section cache** (`hyper_viewer.dart`): `_hashSection` hashes only text content, so a `customCss` change that alters layout/appearance would incorrectly reuse cached sections. `_sectionHashes` is now reset whenever `customCss` changes in `didUpdateWidget`.
+- **Markdown/Delta virtualized/paged mode rendered as single section** (`hyper_viewer.dart`): The sync fallback path wrapped the entire parsed document as one section, defeating virtualization. Added `_splitIntoSections()` to chunk Markdown/Delta documents at block boundaries, matching the HTML isolate path.
+- **`renderConfig` change only partially detected** (`hyper_viewer.dart`): `didUpdateWidget` compared only `virtualizationChunkSize` instead of the full `HyperRenderConfig`. Now uses full value equality (available since the `operator==` fix) so any config change triggers a re-parse.
+- **CSS float class names not detected** (`html_adapter.dart`): `_containsFloatChild` missed Bootstrap/Tailwind float class names (`float-left`, `pull-right`, `alignleft`, etc.), causing premature section splits after float-containing blocks. Common class patterns are now detected heuristically.
 
 ## [1.2.1] - 2026-03-31
 

example/lib/reader_app/book_model.dart

@@ -9,9 +9,9 @@ class Book {
   final BookType type;
   final String? description;
 
-  // New persistent fields
-  int lastPage;
-  bool isBookmarked;
+  // Persistent fields - marked as final for immutability where possible
+  final int lastPage;
+  final bool isBookmarked;
 
   Book({
     required this.id,
@@ -24,6 +24,23 @@ class Book {
     this.lastPage = 0,
     this.isBookmarked = false,
   });
+
+  Book copyWith({
+    int? lastPage,
+    bool? isBookmarked,
+  }) {
+    return Book(
+      id: id,
+      title: title,
+      author: author,
+      coverUrl: coverUrl,
+      content: content,
+      type: type,
+      description: description,
+      lastPage: lastPage ?? this.lastPage,
+      isBookmarked: isBookmarked ?? this.isBookmarked,
+    );
+  }
 }
 
 class MockLibrary {