build: embed ui.toml and banlist with INCBIN instead of a configure loop

ui.toml and the default banlist were embedded by a CMake function that
read each file and emitted a C array header one byte at a time in a
configure-time loop. That is slow to configure, and because the result
is a header, editing either resource recompiled every translation unit
that included it.

- Both files are now embedded with INCBIN from a small generated
  translation unit, the same pattern already used for the fonts. There
  is no generated header, so editing a resource re-assembles one tiny
  object file instead of triggering a wide recompile, and configure does
  no per-byte work.
- Consumers include a hand-written header declaring the symbols and
  always use the embedded data (the __has_include fallback is gone). The
  data is not NUL-terminated, so every consumer passes an explicit size.
- The old EmbedResources.cmake script is removed, and the generated unit
  is added to the app and test builds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CMakeLists.txt

@@ -820,9 +820,21 @@ ${CMAKE_SOURCE_DIR}/res/fonts/NotoEmoji-Subset.ttf;\
 ${CMAKE_SOURCE_DIR}/res/fonts/TwemojiMozilla-Color.ttf"
 )
 
+# Embed ui.toml + default_banlist via INCBIN (same pattern as fonts) - zero configure cost, no
+# generated header, so editing them re-assembles one tiny TU instead of recompiling every includer.
+configure_file(
+    ${CMAKE_SOURCE_DIR}/src/embedded/embedded_text.cpp.in
+    ${CMAKE_BINARY_DIR}/generated/embedded_text.cpp
+    @ONLY)
+set_source_files_properties(
+    ${CMAKE_BINARY_DIR}/generated/embedded_text.cpp
+    PROPERTIES OBJECT_DEPENDS
+    "${CMAKE_SOURCE_DIR}/res/themes/ui.toml;${CMAKE_SOURCE_DIR}/res/default_banlist.txt")
+
 add_executable(ObsidianDragon
     ${APP_SOURCES}
     ${CMAKE_BINARY_DIR}/generated/embedded_fonts.cpp
+    ${CMAKE_BINARY_DIR}/generated/embedded_text.cpp
     ${IMGUI_SOURCES}
     ${QRCODE_SOURCES}
     ${GLAD_SOURCES}
@@ -1045,20 +1057,6 @@ if(LANG_FILES)
     message(STATUS "  Language files: ${LANG_FILES}")
 endif()
 
-# Embed ui.toml into the binary so it's always available at runtime
-include(${CMAKE_SOURCE_DIR}/cmake/EmbedResources.cmake)
-file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/generated)
-embed_resource(
-    ${CMAKE_SOURCE_DIR}/res/themes/ui.toml
-    ${CMAKE_BINARY_DIR}/generated/ui_toml_embedded.h
-    ui_toml
-)
-embed_resource(
-    ${CMAKE_SOURCE_DIR}/res/default_banlist.txt
-    ${CMAKE_BINARY_DIR}/generated/default_banlist_embedded.h
-    default_banlist
-)
-
 # Note: xmrig is embedded via build.sh (embedded_data.h) for Windows builds,
 # following the same pattern as daemon embedding.
 
@@ -1276,6 +1274,7 @@ if(BUILD_TESTING)
         src/resources/embedded_resources.cpp
         src/util/secure_vault.cpp
         src/util/platform.cpp
+        ${CMAKE_BINARY_DIR}/generated/embedded_text.cpp
         src/util/coalescing_writer.cpp
         src/util/logger.cpp
         src/util/lite_server_probe.cpp