feat(addresses): improve address labeling and view-only handling

- Add expanded address icon picker with search, bottom-aligned actions, and improved modal sizing
- Embed a pickaxe icon font subset and wire it into typography/address icon rendering
- Track view-only shielded addresses and prevent sends from non-spendable z-addresses
- Improve address transfer dialog sizing, max amount handling, and text clipping
- Tune main header layout values in ui.toml
- Update README, codebase overview, and third-party license documentation

src/embedded/embedded_fonts.cpp.in

@@ -12,4 +12,5 @@ INCBIN(ubuntu_regular,  "@CMAKE_SOURCE_DIR@/res/fonts/Ubuntu-R.ttf");
 INCBIN(ubuntu_light,    "@CMAKE_SOURCE_DIR@/res/fonts/Ubuntu-Light.ttf");
 INCBIN(ubuntu_medium,   "@CMAKE_SOURCE_DIR@/res/fonts/Ubuntu-Medium.ttf");
 INCBIN(material_icons,  "@CMAKE_SOURCE_DIR@/res/fonts/MaterialIcons-Regular.ttf");
+INCBIN(mdi_pickaxe_subset, "@CMAKE_SOURCE_DIR@/res/fonts/MaterialDesignIcons-Pickaxe-Subset.ttf");
 INCBIN(noto_cjk_subset, "@CMAKE_SOURCE_DIR@/res/fonts/NotoSansCJK-Subset.ttf");

src/embedded/embedded_fonts.h

@@ -27,6 +27,9 @@ extern "C" {
     extern const unsigned char g_material_icons_data[];
     extern const unsigned int  g_material_icons_size;
 
+    extern const unsigned char g_mdi_pickaxe_subset_data[];
+    extern const unsigned int  g_mdi_pickaxe_subset_size;
+
     extern const unsigned char g_noto_cjk_subset_data[];
     extern const unsigned int  g_noto_cjk_subset_size;
 }