refine(cycle): consolidate disclaimer, align columns, unify tiles

Move the non-medical disclaimer to the cycle-tracking on-ramp and drop it
from the repeating in-feature surfaces (calendar tab, predictions panel);
delete the now-unused disclaimer component. Align the left ring column with
the tab content rather than the tab strip. Raise the settings subheading
sizes to the standard card-description scale. Reflow the reminder rows so a
wrapping label no longer collides with its button at narrow widths. Unify
the wheel and phase-education tile padding. Cite the symptothermal
double-check primary source under the second fertility sign.

src/components/settings/cycle-tracking-card.tsx

@@ -2,7 +2,7 @@
 
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import Link from "next/link";
-import { CalendarHeart } from "lucide-react";
+import { CalendarHeart, Info } from "lucide-react";
 
 import { Button } from "@/components/ui/button";
 import { Label } from "@/components/ui/label";
@@ -79,6 +79,21 @@ export function CycleTrackingCard({
             className="mt-0.5 shrink-0"
           />
         </div>
+        {/* The single, prominent non-medical disclaimer for the whole cycle
+            vertical. It lives here at the on-ramp — where expectations are
+            set — instead of repeating beneath every prediction surface. */}
+        <div
+          data-slot="cycle-tracking-disclaimer"
+          className="border-border bg-muted/40 flex items-start gap-2.5 rounded-lg border-l-2 p-3"
+        >
+          <Info
+            className="text-muted-foreground mt-0.5 h-4 w-4 shrink-0"
+            aria-hidden="true"
+          />
+          <p className="text-foreground/80 text-xs leading-relaxed">
+            {t("settings.cycleTracking.disclaimer")}
+          </p>
+        </div>
         {enabled ? (
           <Button
             variant="outline"