feat: comprehensive Wino Mail updates

- ReaderView: complete rewrite with CSS styling, headers, attachments, zoom, find, dark mode, image blocking
- Categories: DAO + UI tree widget with colors, nested categories, assignment
- Rules engine: DAO + evaluation + actions (move, mark read, flag, delete, category, forward)
- Templates: DAO + editor + manager with variables support
- Signatures: DAO + manager + auto-per-account + manual selector in compose
- ComposeView: signature combo, template selector, auto-signature on new email
- MainWindow: frameless with rounded corners, 1px border, resize from edges, no status bar
- Database: new tables (Category, MailCategory, Rule, Template, Signature) with indexes

CMakeLists.txt

@@ -8,25 +8,17 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 include(FetchContent)
 
 # Option to use mailio-based IMAP (OFF by default to avoid Boost dependency issues)
-option(USE_MAILIO_IMAP "Use mailio-based IMAP synchronizer (requires Boost)" OFF)
+option(USE_MAILIO_IMAP "Use mailio-based IMAP synchronizer (requires Boost)" ON)
 
 if (USE_MAILIO_IMAP)
-    # Fetch Boost first (required by mailio)
-    FetchContent_Declare(
-        Boost
-        GIT_REPOSITORY https://github.com/boostorg/boost.git
-        GIT_TAG        boost-1.85.0
-        GIT_SHALLOW    TRUE
-    )
-    FetchContent_MakeAvailable(Boost)
-
-    FetchContent_Declare(
-        mailio
-        GIT_REPOSITORY https://github.com/karastojko/mailio
-        GIT_TAG        master
-        GIT_SHALLOW    TRUE
-    )
-    FetchContent_MakeAvailable(mailio)
+    # Use pre-built mailio and Boost from thirdparty/
+    list(APPEND CMAKE_PREFIX_PATH "${PROJECT_SOURCE_DIR}/thirdparty/boost" "${PROJECT_SOURCE_DIR}/thirdparty/mailio")
+    
+    # Find Boost components
+    find_package(Boost 1.90.0 EXACT COMPONENTS date_time regex REQUIRED CONFIG)
+    
+    # Find mailio
+    find_package(mailio REQUIRED CONFIG)
 endif()
 
 find_package(Qt6 COMPONENTS Core Gui Widgets Network Sql Test Concurrent REQUIRED)
@@ -72,6 +64,7 @@ set(SRC_FILES
     src/services/mimestorage.cpp
     src/services/folderservice.cpp
     src/services/synchronizer.cpp
+    src/services/rulesengine.cpp
     src/services/imap/imapsynchronizer.cpp
     src/services/imap/imapconnection.cpp
     src/services/outlook/outlooksynchronizer.cpp
@@ -81,6 +74,9 @@ set(SRC_FILES
     src/db/dao/accountdao.cpp
     src/db/dao/folderdao.cpp
     src/db/dao/mailitemdao.cpp
+    src/db/dao/categorydao.cpp
+    src/db/dao/ruledao.cpp
+    src/db/dao/templatedao.cpp
     src/db/dbchangeprocessor.cpp
     src/core/eventbus.cpp
     src/utils/notificationmanager.cpp
@@ -117,6 +113,18 @@ set(SRC_FILES
     src/ui/calendarview.h
     src/ui/connectionwizard.cpp
     src/ui/connectionwizard.h
+    src/ui/categorytreewidget.cpp
+    src/ui/categorytreewidget.h
+    src/ui/rulesmanagerdialog.cpp
+    src/ui/rulesmanagerdialog.h
+    src/ui/ruleditordialog.cpp
+    src/ui/ruleditordialog.h
+    src/ui/templateeditordialog.cpp
+    src/ui/templateeditordialog.h
+    src/ui/templatesmanagerdialog.cpp
+    src/ui/templatesmanagerdialog.h
+    src/ui/signaturemanagerdialog.cpp
+    src/ui/signaturemanagerdialog.h
     src/syncscheduler.cpp
     thirdparty/tags/src/tags_line_edit.cpp
     thirdparty/tags/src/tags_edit.cpp