feat(fonts): deinterlace GIF i font ari-w9500 per placeholders

Fix: gif.cpp no desfeia l'interlace, trinxava qualsevol GIF entrellaçat
(tota la sortida de Pillow). Afegeix Defaults::UI::Font per centralitzar
noms/rutes i mou data/font → data/fonts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

source/core/rendering/gif.cpp

@@ -198,10 +198,33 @@ namespace GIF {
         readBytes(buffer, &lzw_code_size, sizeof(uint8_t));
 
         std::vector<uint8_t> compressed_data = readSubBlocks(buffer);
-        int uncompressed_data_length = image_descriptor.image_width * image_descriptor.image_height;
-        std::vector<uint8_t> uncompressed_data(uncompressed_data_length);
+        const int IMG_W = image_descriptor.image_width;
+        const int IMG_H = image_descriptor.image_height;
+        std::vector<uint8_t> uncompressed_data(static_cast<std::size_t>(IMG_W) * IMG_H);
 
         decompress(lzw_code_size, compressed_data.data(), static_cast<int>(compressed_data.size()), uncompressed_data.data());
+
+        // Interlaced GIF (flag 0x40 al byte de fields): les files no arriben
+        // en ordre lineal, sinó en 4 passades (8:0, 8:4, 4:2, 2:1). Reordena
+        // al buffer lineal que espera Surface. Sense aquest pas, les fuentes
+        // i qualsevol GIF entrellaçat es veien completament trinxats.
+        constexpr uint8_t INTERLACE_FLAG = 0x40;
+        if ((image_descriptor.fields & INTERLACE_FLAG) != 0) {
+            constexpr int PASS_START[4] = {0, 4, 2, 1};
+            constexpr int PASS_STEP[4] = {8, 8, 4, 2};
+            std::vector<uint8_t> deinterlaced(static_cast<std::size_t>(IMG_W) * IMG_H);
+            int src_row = 0;
+            for (int pass = 0; pass < 4; ++pass) {
+                for (int dst_row = PASS_START[pass]; dst_row < IMG_H; dst_row += PASS_STEP[pass]) {
+                    std::memcpy(deinterlaced.data() + (static_cast<std::size_t>(dst_row) * IMG_W),
+                        uncompressed_data.data() + (static_cast<std::size_t>(src_row) * IMG_W),
+                        IMG_W);
+                    ++src_row;
+                }
+            }
+            return deinterlaced;
+        }
+
         return uncompressed_data;
     }