fix(qt6): build errors from a11y pass + AUTOMOC hpp fix

Three QML syntax errors introduced by the a11y agents:
- CommentsDBAL.js:25 — string literal split across lines by line-wrapper
- LuaEditor.qml:50 — semicolon between sibling QML elements (invalid)
- SMTPConfigEditor.qml:48 — same semicolon issue

generate_cmake.py: list .hpp files in qt_add_executable so AUTOMOC
scans them for Q_OBJECT — required for header-only Qt classes to link
(signals/vtable are generated by moc, not the compiler).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontends/qt6/CMakeLists.txt

@@ -1,5 +1,5 @@
 # AUTO-GENERATED by generate_cmake.py — do not edit manually
-# Generated from cmake_config.json | 296 QML files, 3 C++ sources, 22 SVGs, 1 audio assets
+# Generated from cmake_config.json | 296 QML files, 8 C++ sources, 22 SVGs, 1 audio assets
 #
 # Discovered packages:
 #   analytics            v1.0.0 - Analytics Studio
@@ -47,6 +47,11 @@ qt_add_executable(dbal-qml
     main.cpp
     src/DBALClient.cpp
     src/PackageLoader.cpp
+    src/DBALRequest.hpp
+    src/DBALTypes.hpp
+    src/ModPlayer.hpp
+    src/NodeRegistry.hpp
+    src/PackageRegistry.hpp
 )
 
 target_compile_definitions(dbal-qml PRIVATE SRCDIR="${CMAKE_CURRENT_SOURCE_DIR}")

frontends/qt6/generate_cmake.py

@@ -211,7 +211,9 @@ def generate_cmake(config: dict, root_dir: Path) -> str:
     qt_components_str = " ".join(all_components)
 
     # Build source files list
-    source_files = ["main.cpp"] + cpp_sources["cpp"]
+    # .hpp files with Q_OBJECT must be listed so AUTOMOC scans them
+    hpp_headers = [h for h in cpp_sources["h"] if h.endswith(".hpp")]
+    source_files = ["main.cpp"] + cpp_sources["cpp"] + hpp_headers
 
     # Collect all QML files: (path, alias_or_None)
     all_qml: list[tuple[str, Optional[str]]] = []