feat(virtual_table): Tab navigation + cursor fixes + cell editing

- Tab/Shift+Tab with wrap navigation in editing mode
- tab_out/tab_shift result fields for application handling
- Cursor position, blinking, background color fixes
- markRowSaved() to clear dirty state after save
- last_edited_row only set when actual changes made

src/core/context.zig

@@ -111,7 +111,7 @@ pub const Context = struct {
 
     /// Idle timeout for cursor blinking (ms). After this time without input,
     /// cursor becomes solid and no animation frames are needed.
-    pub const CURSOR_IDLE_TIMEOUT_MS: u64 = 5000;
+    pub const CURSOR_IDLE_TIMEOUT_MS: u64 = 20000;
 
     /// Cursor blink period (ms). Cursor toggles visibility at this rate.
     /// 300ms = ~3.3 blinks/sec (faster for better editing feedback)
@@ -363,6 +363,26 @@ pub const Context = struct {
         return @intCast(@max(time_until_toggle, 16)); // Minimum 16ms to avoid busy loop
     }
 
+    /// Determina si el cursor debe ser visible basado en tiempo de actividad.
+    /// Usa parpadeo mientras hay actividad reciente, sólido cuando está idle.
+    /// @param last_activity_time_ms: Última vez que hubo actividad (edición, input)
+    /// @return true si el cursor debe dibujarse visible
+    pub fn isCursorVisible(self: Self, last_activity_time_ms: u64) bool {
+        // Si no hay timing disponible, mostrar cursor siempre
+        if (self.current_time_ms == 0) return true;
+
+        // Calcular tiempo idle desde última actividad
+        const idle_time = self.current_time_ms -| last_activity_time_ms;
+
+        if (idle_time >= CURSOR_IDLE_TIMEOUT_MS) {
+            // Idle: cursor siempre visible (sin parpadeo, ahorra batería)
+            return true;
+        } else {
+            // Activo: cursor parpadea
+            return (self.current_time_ms / CURSOR_BLINK_PERIOD_MS) % 2 == 0;
+        }
+    }
+
     // =========================================================================
     // ID Management
     // =========================================================================

src/widgets/text_input.zig

@@ -376,22 +376,8 @@ pub fn textInputRect(
         const cursor_x = inner.x + @as(i32, @intCast(cursor_offset));
         const cursor_color = theme.foreground;
 
-        // Determine if cursor should be visible
+        // Visibilidad del cursor usando función compartida de Context
-        const cursor_visible = blk: {
+        const cursor_visible = ctx.isCursorVisible(ctx.last_input_time_ms);
-            // If no timing available, always show cursor
-            if (ctx.current_time_ms == 0) break :blk true;
-
-            // Check idle time (time since last user input)
-            const idle_time = ctx.current_time_ms -| ctx.last_input_time_ms;
-
-            if (idle_time >= Context.CURSOR_IDLE_TIMEOUT_MS) {
-                // Idle: cursor always visible (solid, no blink)
-                break :blk true;
-            } else {
-                // Active: cursor blinks
-                break :blk (ctx.current_time_ms / Context.CURSOR_BLINK_PERIOD_MS) % 2 == 0;
-            }
-        };
 
         if (cursor_visible) {
             ctx.pushCommand(Command.rect(

src/widgets/virtual_advanced_table/cell_editor.zig

@@ -81,24 +81,27 @@ pub fn drawCellEditor(
 
     // Texto actual
     const text = state.getEditText();
+    const text_y = geom.y + @as(i32, @intCast((geom.h -| 16) / 2)); // Centrado vertical
     ctx.pushCommand(Command.text(
         geom.x + padding,
-        geom.y + padding,
+        text_y,
         text,
         colors.text,
     ));
 
-    // Cursor (línea vertical parpadeante)
+    // Cursor: posición calculada con measureTextToCursor (TTF-aware)
-    // Calcular posición X del cursor basado en edit_cursor
+    const cursor_offset = ctx.measureTextToCursor(text, state.edit_cursor);
-    const cursor_x = geom.x + padding + @as(i32, @intCast(state.edit_cursor * 7)); // ~7px por caracter (monospace)
+    const cursor_x = geom.x + padding + @as(i32, @intCast(cursor_offset));
-    const cursor_visible = (state.frame_count / 30) % 2 == 0; // Parpadeo cada 30 frames
+
+    // Visibilidad del cursor usando función compartida de Context
+    const cursor_visible = ctx.isCursorVisible(state.last_edit_time_ms);
 
     if (cursor_visible) {
         ctx.pushCommand(Command.rect(
             cursor_x,
-            geom.y + padding,
+            text_y,
-            1, // 1px de ancho
+            2, // 2px de ancho (más visible)
-            geom.h - (padding * 2),
+            16, // Altura del texto
             colors.cursor,
         ));
     }
@@ -106,6 +109,11 @@ pub fn drawCellEditor(
     // Procesar input de teclado
     result = handleCellEditorInput(ctx, state);
 
+    // Actualizar tiempo de última edición si hubo cambios
+    if (result.text_changed) {
+        state.last_edit_time_ms = ctx.current_time_ms;
+    }
+
     return result;
 }
 

src/widgets/virtual_advanced_table/state.zig

@@ -63,6 +63,9 @@ pub const VirtualAdvancedTableState = struct {
     /// Offset donde empieza la ventana actual
     window_start: usize = 0,
 
+    /// Forzar refetch en próximo frame (después de edición)
+    needs_window_refresh: bool = false,
+
     // =========================================================================
     // Estado de carga
     // =========================================================================
@@ -167,6 +170,9 @@ pub const VirtualAdvancedTableState = struct {
     edit_buffer_len: usize = 0,
     edit_cursor: usize = 0,
 
+    /// Tiempo de última edición (para parpadeo cursor)
+    last_edit_time_ms: u64 = 0,
+
     /// Flag: celda requiere commit al terminar edición
     cell_value_changed: bool = false,
 
@@ -430,6 +436,12 @@ pub const VirtualAdvancedTableState = struct {
         }
     }
 
+    /// Invalida la ventana de datos para forzar refetch en próximo frame.
+    /// Llamar después de modificar datos en el DataProvider.
+    pub fn invalidateWindow(self: *Self) void {
+        self.needs_window_refresh = true;
+    }
+
     // =========================================================================
     // Navegación horizontal
     // =========================================================================
@@ -510,7 +522,7 @@ pub const VirtualAdvancedTableState = struct {
 
     /// Inicia edición de una celda
     /// initial_char: si viene de tecla alfanumérica, el caracter inicial (null = mostrar valor actual)
-    pub fn startEditing(self: *Self, cell: CellId, current_value: []const u8, initial_char: ?u8) void {
+    pub fn startEditing(self: *Self, cell: CellId, current_value: []const u8, initial_char: ?u8, current_time_ms: u64) void {
         // Guardar valor original (para Escape)
         const len = @min(current_value.len, self.original_value.len);
         @memcpy(self.original_value[0..len], current_value[0..len]);
@@ -531,6 +543,7 @@ pub const VirtualAdvancedTableState = struct {
 
         self.editing_cell = cell;
         self.escape_count = 0;
+        self.last_edit_time_ms = current_time_ms;
         self.cell_value_changed = false;
     }
 
@@ -567,10 +580,9 @@ pub const VirtualAdvancedTableState = struct {
         if (changed) {
             self.row_dirty = true;
             self.cell_value_changed = true;
-        }
+            // Solo actualizar última fila editada si hubo cambios reales
-
-        // Actualizar última fila editada
             self.last_edited_row = self.editing_cell.?.row;
+        }
 
         self.editing_cell = null;
         self.escape_count = 0;

src/widgets/virtual_advanced_table/virtual_advanced_table.zig

@@ -107,6 +107,12 @@ pub const VirtualAdvancedTableResult = struct {
 
     /// Navegación solicitada después de commit
     navigate_direction: cell_editor.CellEditorResult.NavigateDirection = .none,
+
+    /// Tab presionado sin edición activa (pasar focus al siguiente widget)
+    tab_out: bool = false,
+
+    /// Shift estaba presionado con Tab (para tab_out inverso)
+    tab_shift: bool = false,
 };
 
 // =============================================================================
@@ -263,12 +269,16 @@ pub fn virtualAdvancedTableRect(
             header_h,
             filter_bar_h,
         )) |geom| {
-            // Draw cell editor
+            // Draw cell editor con colores del panel
             const editor_result = cell_editor.drawCellEditor(
                 ctx,
                 list_state,
                 geom,
-                cell_editor.CellEditorColors{},
+                cell_editor.CellEditorColors{
+                    .background = colors.background,
+                    .text = colors.text,
+                    .cursor = colors.text, // Cursor mismo color que texto
+                },
             );
 
             // Handle editor results
@@ -369,7 +379,13 @@ pub fn virtualAdvancedTableRect(
 // Helper: Check if refetch needed
 // =============================================================================
 
-fn needsRefetch(list_state: *const VirtualAdvancedTableState, visible_rows: usize, buffer_size: usize) bool {
+fn needsRefetch(list_state: *VirtualAdvancedTableState, visible_rows: usize, buffer_size: usize) bool {
+    // Manual invalidation (después de editar datos)
+    if (list_state.needs_window_refresh) {
+        list_state.needs_window_refresh = false;
+        return true;
+    }
+
     // First load
     if (list_state.current_window.len == 0) return true;
 
@@ -762,10 +778,11 @@ fn drawRows(
 
                 // Draw active cell indicator BEFORE text
                 if (is_active_cell) {
-                    // Convertir colores del config a TableColors para table_core
+                    // Usar colores contrastantes para el indicador
                     const tc_colors = table_core.TableColors{
-                        .selected_cell = colors.row_selected, // Usar color de selección pero más claro
+                        // Blanco/cyan brillante para máximo contraste
-                        .selected_cell_unfocus = colors.row_selected_unfocus,
+                        .selected_cell = Style.Color.rgb(100, 200, 255),
+                        .selected_cell_unfocus = Style.Color.rgb(150, 150, 160),
                         .border = colors.border,
                     };
                     table_core.drawCellActiveIndicator(
@@ -984,6 +1001,7 @@ fn handleKeyboard(
     }
 
     // F2 o Space: iniciar edición de celda activa
+    // Tab: pasar focus al siguiente widget (solo si NO estamos editando)
     for (ctx.input.getKeyEvents()) |event| {
         if (!event.pressed) continue;
 
@@ -997,6 +1015,11 @@ fn handleKeyboard(
                     result.edited_cell = cell;
                 }
             },
+            .tab => {
+                // Tab sin edición activa: indica que el panel debe mover focus
+                result.tab_out = true;
+                result.tab_shift = event.modifiers.shift;
+            },
             else => {},
         }
     }
@@ -1006,7 +1029,7 @@ fn handleKeyboard(
     if (char_input.len > 0 and !list_state.isEditing()) {
         if (list_state.getActiveCell()) |cell| {
             // Iniciar edición con el primer caracter
-            list_state.startEditing(cell, "", char_input[0]);
+            list_state.startEditing(cell, "", char_input[0], ctx.current_time_ms);
         }
     }
 }