style(grid): IBM Plex Sans font, increased cell padding

- Replace Fira Code with IBM Plex Sans for cleaner data display
- Use regular weight for grid data cells, bold for headers
- Increase cell padding to (12, 6) for better visual separation
- Add font index 2 for regular weight grid cells

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: singaraiona

Makefile

@@ -170,7 +170,7 @@ endif
 default: $(TARGET)
 debug: $(TARGET)
 
-EMBED_ASSETS = assets/fonts/FiraCode-Bold.ttf assets/fonts/fa-solid-900.otf assets/images/logo.svg assets/images/icon.svg
+EMBED_ASSETS = assets/fonts/IBMPlexSans-Bold.ttf assets/fonts/IBMPlexSans-Regular.ttf assets/fonts/fa-solid-900.otf assets/images/logo.svg assets/images/icon.svg
 
 src/embed_assets.h: $(EMBED_ASSETS) scripts/embed.sh
 	sh scripts/embed.sh $(EMBED_ASSETS) > $@
@@ -246,11 +246,17 @@ deps:
 EXT_DIR = deps/rayforce/ext
 EXT_RAYKX = $(EXT_DIR)/raykx
 
-# Build extensions and copy to ext/
+# Build extensions and copy to ext/ (skip on Windows - raykx uses POSIX sockets)
+ifneq (,$(IS_WINDOWS))
+ext:
+	@echo "Skipping extensions on Windows (raykx requires POSIX sockets)"
+	@mkdir -p ext
+else
 ext:
 	$(MAKE) -C $(EXT_RAYKX) release
 	@mkdir -p ext
 	@cp $(EXT_RAYKX)/libraykx.so ext/ 2>/dev/null || cp $(EXT_RAYKX)/libraykx.dylib ext/ 2>/dev/null || true
+endif
 
 clean:
 	rm -f src/embed_assets.h

assets/fonts/FiraCode-Bold.ttf

@@ -439,6 +439,9 @@ nil_t rfui_render_grid(rfui_widget_t* widget) {
     // Use available content region for table
     ImVec2 outer_size = ImVec2(0.0f, 0.0f);
 
+    // Increase cell padding for better data separation
+    ImGui::PushStyleVar(ImGuiStyleVar_CellPadding, ImVec2(12.0f, 6.0f));
+
     if (ImGui::BeginTable("##grid", (int)ncols, table_flags, outer_size)) {
         // Setup columns with headers
         for (i64_t col_idx = 0; col_idx < ncols; col_idx++) {
@@ -520,6 +523,12 @@ nil_t rfui_render_grid(rfui_widget_t* widget) {
         // Cache column pointers for performance (avoid repeated AS_LIST dereference)
         obj_p* cols = AS_LIST(vals);
 
+        // Use regular (non-bold) font for data cells
+        ImGuiIO& io = ImGui::GetIO();
+        if (io.Fonts->Fonts.Size > 2) {
+            ImGui::PushFont(io.Fonts->Fonts[2]);
+        }
+
         while (clipper.Step()) {
             for (int row = clipper.DisplayStart; row < clipper.DisplayEnd; row++) {
                 ImGui::TableNextRow();
@@ -634,8 +643,16 @@ nil_t rfui_render_grid(rfui_widget_t* widget) {
         }
 
         clipper.End();
+
+        // Pop regular font
+        ImGuiIO& io_pop = ImGui::GetIO();
+        if (io_pop.Fonts->Fonts.Size > 2) {
+            ImGui::PopFont();
+        }
+
         ImGui::EndTable();
     }
+    ImGui::PopStyleVar();  // CellPadding
 
     // Column dropdown popup — opened once on click frame
     if (ui_state && ui_state->menu_open_request) {

assets/fonts/IBMPlexSans-Bold.ttf

@@ -177,11 +177,11 @@ i32_t rfui_ui_init(nil_t) {
     // Apply dashboard theme (replaces StyleColorsDark)
     rfui_theme_apply();
 
-    // Load Fira Code + FontAwesome as the single UI font (index 0)
+    // Load IBM Plex Sans Bold + FontAwesome as the main UI font (index 0)
     float font_size = 30.0f;
     ImFontConfig font_cfg;
     font_cfg.FontDataOwnedByAtlas = false;
-    io.Fonts->AddFontFromMemoryTTF((void*)embed_FiraCode_Bold_ttf, embed_FiraCode_Bold_ttf_len, font_size, &font_cfg);
+    io.Fonts->AddFontFromMemoryTTF((void*)embed_IBMPlexSans_Bold_ttf, embed_IBMPlexSans_Bold_ttf_len, font_size, &font_cfg);
 
     static const ImWchar icon_ranges[] = { 0xf000, 0xf8ff, 0 };
     float icon_size = font_size * 0.75f;
@@ -193,11 +193,16 @@ i32_t rfui_ui_init(nil_t) {
     icon_cfg.FontDataOwnedByAtlas = false;
     io.Fonts->AddFontFromMemoryTTF((void*)embed_fa_solid_900_otf, embed_fa_solid_900_otf_len, icon_size, &icon_cfg, icon_ranges);
 
-    // Large Fira Code for text/label widgets (index 1)
+    // Large IBM Plex Sans for text/label widgets (index 1)
     float large_font_size = 64.0f;
     ImFontConfig large_cfg;
     large_cfg.FontDataOwnedByAtlas = false;
-    io.Fonts->AddFontFromMemoryTTF((void*)embed_FiraCode_Bold_ttf, embed_FiraCode_Bold_ttf_len, large_font_size, &large_cfg);
+    io.Fonts->AddFontFromMemoryTTF((void*)embed_IBMPlexSans_Bold_ttf, embed_IBMPlexSans_Bold_ttf_len, large_font_size, &large_cfg);
+
+    // Regular IBM Plex Sans for grid data cells (index 2)
+    ImFontConfig regular_cfg;
+    regular_cfg.FontDataOwnedByAtlas = false;
+    io.Fonts->AddFontFromMemoryTTF((void*)embed_IBMPlexSans_Regular_ttf, embed_IBMPlexSans_Regular_ttf_len, font_size, &regular_cfg);
 
     // Setup Platform/Renderer backends
     ImGui_ImplGlfw_InitForOpenGL(g_window, true);