feat: Centrado vertical texto y x_offset para botones

Cambios:
- base.zig: Añadido x_offset a ActionButtonsOpts y NavButtonsOpts
- text_input.zig: char_height 8→16 para fuente 8x16
- table/render.zig: char_height 8→16 (header y celdas)

El centrado vertical del texto ahora funciona correctamente
con fuentes 8x16 (VGA standard).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/panels/detail/base.zig

@@ -76,6 +76,8 @@ pub const ActionButtonsOpts = struct {
     button_height: u32 = 28,
     /// Espacio entre botones
     spacing: i32 = 8,
+    /// Offset X desde el borde izquierdo del panel
+    x_offset: i32 = 8,
 };
 
 /// Opciones para botones de navegacion
@@ -96,6 +98,8 @@ pub const NavButtonsOpts = struct {
     button_width: u32 = 40,
     /// Alto de cada boton
     button_height: u32 = 28,
+    /// Offset X desde el borde izquierdo del panel
+    x_offset: i32 = 8,
 };
 
 // =============================================================================
@@ -266,7 +270,7 @@ pub const DetailPanelBase = struct {
         _ = self;
         var result = ActionButtonsResult{};
 
-        const x = rect.x + 8;
+        const x = rect.x + opts.x_offset;
         const bw = opts.button_width;
         const bh = opts.button_height;
         const sp = opts.spacing;
@@ -321,7 +325,7 @@ pub const DetailPanelBase = struct {
         _ = self;
         var result = NavButtonsResult{};
 
-        const x = rect.x + 8;
+        const x = rect.x + opts.x_offset;
         const bw = opts.button_width;
         const bh = opts.button_height;
 

src/widgets/table/render.zig

@@ -68,7 +68,8 @@ pub fn drawHeader(
     var col_x = bounds.x + @as(i32, @intCast(state_col_w));
 
     // Draw column headers
-    const char_height: u32 = 8;
+    // Use 16 for 8x16 fonts (VGA standard, better readability)
+    const char_height: u32 = 16;
     const text_y = header_bounds.y + @as(i32, @intCast((config.header_height -| char_height) / 2));
 
     for (columns, 0..) |col, col_idx| {
@@ -191,7 +192,8 @@ pub fn drawRow(
 
     // Draw cells
     var col_x = row_bounds.x + @as(i32, @intCast(state_col_w));
-    const char_height: u32 = 8;
+    // Use 16 for 8x16 fonts (VGA standard, better readability)
+    const char_height: u32 = 16;
     const text_y = row_bounds.y + @as(i32, @intCast((config.row_height -| char_height) / 2));
 
     for (columns, 0..) |col, col_idx| {

src/widgets/text_input.zig

@@ -338,7 +338,8 @@ pub fn textInputRect(
     const display_color = if (state.len == 0) placeholder_color else text_color;
 
     // Calculate text position (left-aligned, vertically centered)
-    const char_height: u32 = 8;
+    // Use 16 for 8x16 fonts (VGA standard, better readability)
+    const char_height: u32 = 16;
     const text_y = inner.y + @as(i32, @intCast((inner.h -| char_height) / 2));
 
     if (config.password and state.len > 0) {