feat: add breath colors

app/dashboard/breathing/page.tsx

@@ -26,6 +26,29 @@ interface BreathingTemplate {
   duration?: number;
   description?: string;
   image_id?: number;
+  breathing_color_id?: number | null;
+  breathing_color?: BreathingColor | null;
+}
+
+interface BreathingColor {
+  id: number;
+  name?: string | null;
+  colors: string[];
+}
+
+// "#AARRGGBB" (ARGB) or "#RRGGBB" → a CSS color string.
+function cssColor(c?: string): string {
+  if (!c) return "transparent";
+  const hex = c.replace("#", "");
+  if (hex.length === 8) return `#${hex.slice(2)}${hex.slice(0, 2)}`; // ARGB→RGB(drop alpha)
+  return `#${hex}`;
+}
+
+// Linear gradient (or solid) preview for a list of colors.
+function gradientStyle(colors: string[]): React.CSSProperties {
+  const cs = (colors.length ? colors : ["#00000000"]).map(cssColor);
+  if (cs.length === 1) return { background: cs[0] };
+  return { background: `linear-gradient(135deg, ${cs.join(", ")})` };
 }
 
 interface BreathingForm {
@@ -57,11 +80,13 @@ function numOrUndefined(v: string): number | undefined {
 export default function BreathingPage() {
   const { data, loading, error, reload } =
     useList<BreathingTemplate>("/breathing-templates");
+  const { data: palette } = useList<BreathingColor>("/breathing-colors");
   const toast = useToast();
 
   const [editing, setEditing] = useState<BreathingTemplate | null>(null);
   const [open, setOpen] = useState(false);
   const [form, setForm] = useState<BreathingForm>(emptyForm);
+  const [breathingColorId, setBreathingColorId] = useState<number | null>(null);
   const [saving, setSaving] = useState(false);
 
   const [deleting, setDeleting] = useState<BreathingTemplate | null>(null);
@@ -74,6 +99,7 @@ export default function BreathingPage() {
   function openCreate() {
     setEditing(null);
     setForm(emptyForm);
+    setBreathingColorId(null);
     setOpen(true);
   }
   function openEdit(row: BreathingTemplate) {
@@ -87,6 +113,7 @@ export default function BreathingPage() {
       description: row.description ?? "",
       image_id: row.image_id != null ? String(row.image_id) : "",
     });
+    setBreathingColorId(row.breathing_color_id ?? null);
     setOpen(true);
   }
 
@@ -102,6 +129,7 @@ export default function BreathingPage() {
         duration: numOrUndefined(form.duration),
         description: form.description,
         image_id: numOrUndefined(form.image_id),
+        breathing_color_id: breathingColorId ?? undefined,
       };
       if (editing) {
         // Update is JSON on /breathing-templates/:id
@@ -167,6 +195,21 @@ export default function BreathingPage() {
       header: "مدت زمان",
       render: (r) => (r.duration != null ? formatDuration(r.duration) : "—"),
     },
+    {
+      key: "color",
+      header: "رنگ",
+      className: "w-20",
+      render: (r) =>
+        r.breathing_color?.colors?.length ? (
+          <span
+            className="inline-block h-6 w-10 rounded-md border border-border"
+            style={gradientStyle(r.breathing_color.colors)}
+            title={r.breathing_color.name ?? ""}
+          />
+        ) : (
+          "—"
+        ),
+    },
   ];
 
   return (
@@ -288,6 +331,44 @@ export default function BreathingPage() {
               placeholder="توضیح کوتاه درباره قالب"
             />
           </Field>
+
+          <Field
+            label="رنگ تمرین"
+            hint={
+              palette.length
+                ? "یک رنگ از پالت انتخاب کنید (در «رنگ‌های تنفس» مدیریت می‌شود)."
+                : "هنوز رنگی در «رنگ‌های تنفس» تعریف نشده است."
+            }
+          >
+            <div className="flex flex-wrap items-center gap-2">
+              {/* "no color" option */}
+              <button
+                type="button"
+                title="بدون رنگ"
+                onClick={() => setBreathingColorId(null)}
+                className={`flex h-9 w-9 items-center justify-center rounded-full border-2 text-muted ${
+                  breathingColorId === null ? "border-primary ring-2 ring-primary/40" : "border-border"
+                }`}
+              >
+                ✕
+              </button>
+              {palette.map((p) => {
+                const selected = breathingColorId === p.id;
+                return (
+                  <button
+                    key={p.id}
+                    type="button"
+                    title={p.name ?? ""}
+                    onClick={() => setBreathingColorId(p.id)}
+                    style={gradientStyle(p.colors)}
+                    className={`h-9 w-9 rounded-full border-2 transition ${
+                      selected ? "border-primary ring-2 ring-primary/40" : "border-border"
+                    }`}
+                  />
+                );
+              })}
+            </div>
+          </Field>
         </form>
       </Modal>