Remove all RDEPUBBackgroundTrace.log and bare print diagnostic calls

Keep only the evaluateFullPageMapTakeover: fullReplace diagnostic log
in RDEPUBPageMapReconciliationCoordinator.swift for future debugging.

Simplified RDEPUBBackgroundTrace to just the log method (removed measure
and debug gating). Removed all [EPUB][...], [ReadViewDemo], and
[EPUB][Pagination] print statements across the project.

Also includes earlier bug fixes:
- Fix stale currentPageNumber in extendPartial commit
- Fix pageCurl rebindVisiblePage during transition
- Fix keepCurrentWindow not removing pending update from queue
- Fix right-aligned text (巫鸿 bug) via avoidPageBreakInside,
  tail merger, and continuation paragraph normalization
- Add text-indent reset for aligned blocks in CSS compatibility layer

Co-Authored-By: Claude <noreply@anthropic.com>

Sources/RDReaderView/EPUBUI/ReaderController/RDEPUBBackgroundCoverageStore.swift

@@ -69,10 +69,6 @@ final class RDEPUBBackgroundCoverageStore {
                     segments[index] = mergedSegment
                     currentMemoryBytes = currentMemoryBytes - existing.estimatedMemoryBytes + mergedSegment.estimatedMemoryBytes
                     merged = true
-                    RDEPUBBackgroundTrace.log(
-                        "CoverageStore",
-                        "merged segments: \(existing.lowerSpineIndex)-\(existing.upperSpineIndex) + \(segment.lowerSpineIndex)-\(segment.upperSpineIndex)"
-                    )
                     break
                 }
             }
@@ -84,11 +80,6 @@ final class RDEPUBBackgroundCoverageStore {
         }
 
         lastAccessTime[segment.lowerSpineIndex] = CFAbsoluteTimeGetCurrent()
-
-        RDEPUBBackgroundTrace.log(
-            "CoverageStore",
-            "added segment \(segment.lowerSpineIndex)-\(segment.upperSpineIndex) total=\(segments.count) memory=\(currentMemoryBytes)B"
-        )
     }
 
     func findSegment(containing spineIndex: Int) -> RDEPUBBackgroundCoverageSegment? {
@@ -138,10 +129,6 @@ final class RDEPUBBackgroundCoverageStore {
         activeWindowSpineIndices: Set<Int>,
         protectedSpineIndices: Set<Int>
     ) {
-        RDEPUBBackgroundTrace.log(
-            "CoverageStore",
-            "memory warning: clearing cold segments, current=\(currentMemoryBytes)B"
-        )
 
         clearColdSegments(
             activeWindowSpineIndices: activeWindowSpineIndices,
@@ -167,11 +154,6 @@ final class RDEPUBBackgroundCoverageStore {
                 segments.removeAll { $0.lowerSpineIndex == segment.lowerSpineIndex }
             }
         }
-
-        RDEPUBBackgroundTrace.log(
-            "CoverageStore",
-            "after cleanup: segments=\(segments.count) memory=\(currentMemoryBytes)B"
-        )
     }
 
     private func evictIfNeeded(forNewSegment newSegment: RDEPUBBackgroundCoverageSegment) {
@@ -201,11 +183,6 @@ final class RDEPUBBackgroundCoverageStore {
         let evicted = segments.remove(at: oldestIndex)
         currentMemoryBytes -= evicted.estimatedMemoryBytes
         lastAccessTime.removeValue(forKey: evicted.lowerSpineIndex)
-
-        RDEPUBBackgroundTrace.log(
-            "CoverageStore",
-            "evicted segment \(evicted.lowerSpineIndex)-\(evicted.upperSpineIndex)"
-        )
     }
 
     private func canMerge(_ lhs: RDEPUBBackgroundCoverageSegment, _ rhs: RDEPUBBackgroundCoverageSegment) -> Bool {