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>

src/util/platform.cpp

@@ -15,13 +15,8 @@
 #include <system_error>
 #include <thread>
 
-// Embedded ui.toml (generated at build time)
-#if __has_include("ui_toml_embedded.h")
-#include "ui_toml_embedded.h"
-#define HAS_EMBEDDED_UI_TOML 1
-#else
-#define HAS_EMBEDDED_UI_TOML 0
-#endif
+// Embedded ui.toml (INCBIN)
+#include "embedded/embedded_text.h"
 #include <sys/stat.h>
 
 #ifdef _WIN32
@@ -562,20 +557,7 @@ void Platform::ensureObsidianDragonSetup()
             // Use the build-time embedded copy first; fall back to the
             // bundled file on disk.
             std::string content;
-#if HAS_EMBEDDED_UI_TOML
-            content.assign(reinterpret_cast<const char*>(embedded::ui_toml_data),
-                           embedded::ui_toml_size);
-#else
-            {
-                fs::path bundled = fs::path(getExecutableDirectory()) / "res" / "themes" / "ui.toml";
-                std::ifstream src(bundled);
-                if (src.is_open()) {
-                    std::ostringstream ss;
-                    ss << src.rdbuf();
-                    content = ss.str();
-                }
-            }
-#endif
+            content.assign(reinterpret_cast<const char*>(g_ui_toml_data), g_ui_toml_size);
 
             if (!content.empty()) {
                 // Patch the theme metadata so the example is clearly