General fixes (#102)

* Improved PDF embedded annotation hit detection logic

* Updated EPUB and PDF reader logic to improve position tracking and TTS stability.

Key changes:
- Refined CFI and locator handling in `EpubReaderScreen` with improved initialization.
- Updated `BookPaginator` to more accurately calculate text offsets in chunks and improve CFI matching logic.
- Modified `TtsPlaybackManager` to insert media items at the correct index, ensuring proper playback order.
- Simplified `EpubReaderTts` page scrolling by removing conditional checks for backward jumps.
- Disabled OCR fallback in `PdfViewerScreen` during text extraction for TTS.

* Updated extractTextWithCfiFromTop to use getBoundingClientRect for identifying the starting block

app/src/main/java/com/aryan/reader/epubreader/ChapterWebView.kt

@@ -720,9 +720,7 @@ fun ChapterWebView(
 
                             if (!initialCfi.isNullOrBlank()) {
                                 val cfiJsCommand = "javascript:window.scrollToCfi('$initialCfi');"
-                                Timber.d(
-                                    "WebView onPageFinished: Executing initial scroll to CFI: $initialCfi"
-                                )
+                                Timber.tag("POS_DIAG").d("WebView onPageFinished: Triggering scroll to initialCfi: $initialCfi")
                                 view?.evaluateJavascript(cfiJsCommand) {
                                     onChapterInitiallyScrolled()
                                     scrollActionTaken = true