fix: next button disabled when user form is incomplete

- gradient_button now accepts enabled parameter; uses Sense::hover() and muted colors when disabled
- Added primary_button_enabled, secondary_button_enabled, danger_button_enabled variants
- main.rs: next button uses primary_button_enabled(..., is_valid) so it's grayed out and non-clickable when form incomplete

src/main.rs

@@ -455,11 +455,7 @@ impl eframe::App for YaliApp {
                                 // if !is_exec && !is_finish && ui::theme::danger_button(ui, &t!("cancel")).clicked() {
                                 //     self.show_cancel_dialog = true;
                                 // };
-                                let next_clicked = if is_valid {
+                                let next_clicked = ui::theme::primary_button_enabled(ui, &next_label, is_valid).clicked();
-                                    ui::theme::primary_button(ui, &next_label).clicked()
-                                } else {
-                                    ui::theme::secondary_button(ui, &next_label).clicked()
-                                };
                                 if next_clicked {
                                     self.state.current_step += 1;
                                 }

src/ui/buttons.rs

@@ -9,7 +9,7 @@ fn lerp_color(a: Color32, b: Color32, t: f32) -> Color32 {
     )
 }
 
-fn gradient_button(ui: &mut egui::Ui, text: &str, top_color: Color32, bottom_color: Color32, text_color: Color32, hover_top: Color32, hover_bottom: Color32, border_color: Color32) -> egui::Response {
+fn gradient_button(ui: &mut egui::Ui, text: &str, top_color: Color32, bottom_color: Color32, text_color: Color32, hover_top: Color32, hover_bottom: Color32, border_color: Color32, enabled: bool) -> egui::Response {
     let rounding = Rounding::same(6.0);
     let min_size = Vec2::new(100.0, 32.0);
     let padding = Vec2::new(12.0, 6.0);
@@ -27,13 +27,26 @@ fn gradient_button(ui: &mut egui::Ui, text: &str, top_color: Color32, bottom_col
         min_size.y.max(galley.size().y + 2.0 * padding.y),
     );
 
-    let (rect, response) = ui.allocate_exact_size(size, egui::Sense::click());
+    let sense = if enabled { egui::Sense::click() } else { egui::Sense::hover() };
+    let (rect, response) = ui.allocate_exact_size(size, sense);
+
+    let (actual_top, actual_bottom, actual_text, actual_border) = if enabled {
+        let hover_gradient = if response.hovered() {
+            (hover_top, hover_bottom)
+        } else {
+            (top_color, bottom_color)
+        };
+        (hover_gradient.0, hover_gradient.1, text_color, border_color)
+    } else {
+        let disabled = lerp_color(top_color, Color32::from_rgb(80, 80, 80), 0.5);
+        (disabled, disabled, Color32::from_gray(160), Color32::from_gray(100))
+    };
 
     let n_strips = 16;
     for i in 0..n_strips {
         let t = i as f32 / n_strips as f32;
         let t2 = (i + 1) as f32 / n_strips as f32;
-        let c = lerp_color(top_color, bottom_color, (t + t2) * 0.5);
+        let c = lerp_color(actual_top, actual_bottom, (t + t2) * 0.5);
         let y0 = rect.top() + rect.height() * t;
         let y1 = rect.top() + rect.height() * t2;
         let strip_rect = egui::Rect::from_min_max(
@@ -43,27 +56,12 @@ fn gradient_button(ui: &mut egui::Ui, text: &str, top_color: Color32, bottom_col
         ui.painter().rect(strip_rect, Rounding::ZERO, c, Stroke::NONE);
     }
 
-    if response.hovered() {
+    ui.painter().rect(rect, rounding, Color32::TRANSPARENT, Stroke::new(1.0, actual_border));
-        for i in 0..n_strips {
-            let t = i as f32 / n_strips as f32;
-            let t2 = (i + 1) as f32 / n_strips as f32;
-            let c = lerp_color(hover_top, hover_bottom, (t + t2) * 0.5);
-            let y0 = rect.top() + rect.height() * t;
-            let y1 = rect.top() + rect.height() * t2;
-            let strip_rect = egui::Rect::from_min_max(
-                egui::pos2(rect.left(), y0),
-                egui::pos2(rect.right(), y1),
-            );
-            ui.painter().rect(strip_rect, Rounding::ZERO, c, Stroke::NONE);
-        }
-    }
-
-    ui.painter().rect(rect, rounding, Color32::TRANSPARENT, Stroke::new(1.0, border_color));
 
     ui.painter().galley(
         egui::pos2(rect.center().x - galley.size().x / 2.0, rect.center().y - galley.size().y / 2.0),
         galley,
-        text_color,
+        actual_text,
     );
 
     if let Some(cursor) = ui.visuals().interact_cursor {
@@ -76,34 +74,48 @@ fn gradient_button(ui: &mut egui::Ui, text: &str, top_color: Color32, bottom_col
 }
 
 pub fn primary_button(ui: &mut egui::Ui, text: &str) -> egui::Response {
+    primary_button_enabled(ui, text, true)
+}
+
+pub fn primary_button_enabled(ui: &mut egui::Ui, text: &str, enabled: bool) -> egui::Response {
     gradient_button(ui, text,
         Color32::from_rgb(50, 130, 255),
         Color32::from_rgb(13, 110, 253),
         Color32::WHITE,
         Color32::from_rgb(70, 150, 255),
         Color32::from_rgb(30, 130, 255),
-        Color32::from_rgb(13, 110, 253))
+        Color32::from_rgb(13, 110, 253),
+        enabled)
 }
 
 pub fn secondary_button(ui: &mut egui::Ui, text: &str) -> egui::Response {
+    secondary_button_enabled(ui, text, true)
+}
+
+pub fn secondary_button_enabled(ui: &mut egui::Ui, text: &str, enabled: bool) -> egui::Response {
     gradient_button(ui, text,
         Color32::from_rgb(130, 140, 150), // top
         Color32::from_rgb(100, 110, 120), // bottom
         Color32::from_rgb(255, 255, 255), // text color32
         Color32::from_rgb(150, 160, 170), // hover top
         Color32::from_rgb(120, 130, 140), // hover bottom
-        Color32::from_rgb(100, 110, 120)  // border
+        Color32::from_rgb(100, 110, 120), // border
-    )
+        enabled)
 }
 
 pub fn danger_button(ui: &mut egui::Ui, text: &str) -> egui::Response {
+    danger_button_enabled(ui, text, true)
+}
+
+pub fn danger_button_enabled(ui: &mut egui::Ui, text: &str, enabled: bool) -> egui::Response {
     gradient_button(ui, text,
         Color32::from_rgb(240, 83, 99),
         Color32::from_rgb(200, 40, 60),
         Color32::WHITE,
         Color32::from_rgb(255, 100, 120),
         Color32::from_rgb(220, 60, 80),
-        Color32::from_rgb(200, 40, 60))
+        Color32::from_rgb(200, 40, 60),
+        enabled)
 }
 
 #[allow(dead_code)]
@@ -114,7 +126,8 @@ pub fn white_grd_btn(ui: &mut egui::Ui, text: &str) -> egui::Response {
         Color32::from_rgb(102, 102, 102),
         Color32::from_rgb(246, 246, 246),
         Color32::from_rgb(255, 255, 255),
-        Color32::from_rgb(177, 177, 177))
+        Color32::from_rgb(177, 177, 177),
+        true)
 }
 #[allow(dead_code)]
 pub fn btn_dark_blue(ui: &mut egui::Ui, text: &str) -> egui::Response {
@@ -124,7 +137,8 @@ pub fn btn_dark_blue(ui: &mut egui::Ui, text: &str) -> egui::Response {
         Color32::WHITE,
         Color32::from_rgb(70, 140, 207),
         Color32::from_rgb(99, 184, 238),
-        Color32::from_rgb(56, 102, 163))
+        Color32::from_rgb(56, 102, 163),
+        true)
 }
 
 #[allow(dead_code)]
@@ -135,5 +149,6 @@ pub fn light_gray_btn(ui: &mut egui::Ui, text: &str) -> egui::Response {
         Color32::from_rgb(102, 102, 102),  // metin: #666666
         Color32::from_rgb(233, 233, 233),  // hover üst (ters)
         Color32::from_rgb(249, 249, 249),  // hover alt (ters)
-        Color32::from_rgb(227, 195, 227))  // border: #e3c7e3
+        Color32::from_rgb(227, 195, 227),  // border: #e3c7e3
+        true)
 }