feat: responsive compact mail view + folder unread badges

- CompactMailDelegate: card-based view for narrow panels (<420px)
  * Avatar with hash-based color, sender + date (relative format)
  * Subject line with attachment icon
  * Action buttons: flag, delete, category, more (context menu)
  * Unread highlight with light blue background + bold sender
- MailListView: automatic switch between tree/table (wide) and list/cards (narrow)
  * QStackedWidget with QTreeView + QListView sharing same proxy model
  * resizeEvent threshold at 420px
  * Signals forwarded to MainMainWindow for actions
- FolderTreeDelegate: custom paint for folder tree
  * Unread count badge (blue pill) right-aligned on folder nodes
  * Account nodes bold, folder nodes normal weight
  * Proper indentation per depth level
- MailItemDao::countUnreadByFolderId() for real-time unread counts
- MainMainWindow handlers for compact actions (flag, delete, category, more menu)

build/CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/build.make

@@ -0,0 +1,86 @@
+# CMAKE generated file: DO NOT EDIT!
+# Generated by "Unix Makefiles" Generator, CMake Version 4.2
+
+# Delete rule output on recipe failure.
+.DELETE_ON_ERROR:
+
+#=============================================================================
+# Special targets provided by cmake.
+
+# Disable implicit rules so canonical targets will work.
+.SUFFIXES:
+
+# Disable VCS-based implicit rules.
+% : %,v
+
+# Disable VCS-based implicit rules.
+% : RCS/%
+
+# Disable VCS-based implicit rules.
+% : RCS/%,v
+
+# Disable VCS-based implicit rules.
+% : SCCS/s.%
+
+# Disable VCS-based implicit rules.
+% : s.%
+
+.SUFFIXES: .hpux_make_needs_suffix_list
+
+# Command-line flag to silence nested $(MAKE).
+$(VERBOSE)MAKESILENT = -s
+
+#Suppress display of executed commands.
+$(VERBOSE).SILENT:
+
+# A target that is always out of date.
+cmake_force:
+.PHONY : cmake_force
+
+#=============================================================================
+# Set environment variables for the build.
+
+# The shell in which to execute make rules.
+SHELL = /bin/sh
+
+# The CMake executable.
+CMAKE_COMMAND = /usr/bin/cmake
+
+# The command to remove a file.
+RM = /usr/bin/cmake -E rm -f
+
+# Escaping for special characters.
+EQUALS = =
+
+# The top-level source directory on which CMake was run.
+CMAKE_SOURCE_DIR = /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt
+
+# The top-level build directory on which CMake was run.
+CMAKE_BINARY_DIR = /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt/build
+
+# Utility rule file for test_mimestorage_autogen_timestamp_deps.
+
+# Include any custom commands dependencies for this target.
+include CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/compiler_depend.make
+
+# Include the progress variables for this target.
+include CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/progress.make
+
+CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/codegen:
+.PHONY : CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/codegen
+
+test_mimestorage_autogen_timestamp_deps: CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/build.make
+.PHONY : test_mimestorage_autogen_timestamp_deps
+
+# Rule to build all files generated by this target.
+CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/build: test_mimestorage_autogen_timestamp_deps
+.PHONY : CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/build
+
+CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/clean:
+	$(CMAKE_COMMAND) -P CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/cmake_clean.cmake
+.PHONY : CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/clean
+
+CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/depend:
+	cd /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt/build && $(CMAKE_COMMAND) -E cmake_depends "Unix Makefiles" /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt/build /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt/build /mnt/c/Users/javie/Documents/Codex/2026-08-11/revisar-2/wino-mail-dtkqt/build/CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/DependInfo.cmake "--color=$(COLOR)" test_mimestorage_autogen_timestamp_deps
+.PHONY : CMakeFiles/test_mimestorage_autogen_timestamp_deps.dir/depend
+