3 Commits

Author	SHA1	Message	Date
cottongin	4db384edb6	fix: prevent Serial.printf from blocking when USB disconnected ... On ESP32-C3 with USB CDC, Serial.printf() blocks indefinitely when USB is not connected. This caused device freezes when booted without USB. Solution: Call Serial.setTxTimeoutMs(0) after Serial.begin() to make all Serial output non-blocking. Also added if (Serial) guards to high-traffic logging paths in EpubReaderActivity as belt-and-suspenders protection. Includes documentation of the debugging process and Serial call inventory. Also applies clang-format to fix pre-existing formatting issues.	2026-01-28 16:16:11 -05:00
cottongin	c2a966a6ea	refactor: Memory optimization and XTC format removal ... Memory optimization: - Add LOG_STACK_WATERMARK macro for task stack monitoring - Add freeCoverBufferIfAllocated() and preloadCoverBuffer() for memory management - Improve cover buffer reuse to reduce heap fragmentation - Add grayscale buffer cleanup safety in GfxRenderer - Make grayscale rendering conditional on successful buffer allocation - Add detailed heap fragmentation logging with ESP-IDF API - Add CSS parser memory usage estimation XTC format removal: - Remove entire lib/Xtc library (XTC parser and types) - Remove XtcReaderActivity and XtcReaderChapterSelectionActivity - Remove XTC file handling from HomeActivity, SleepActivity, ReaderActivity - Remove .xtc/.xtch from supported extensions in BookManager - Remove XTC cache prefix from Md5Utils - Update web server and file browser to exclude XTC format - Clear in-memory caches when disk cache is cleared	2026-01-27 20:35:32 -05:00
cottongin	d5a9873bd7	adds delete and archive abilities	2026-01-22 15:45:07 -05:00