simplify: zakat yes/no per campaign, remove 5 fund types, add I've Donated button for external pledges

- Event.zakatEligible (boolean) replaces Organization.zakatEnabled + 5 fund types
- Pledge.isZakat (boolean) replaces Pledge.fundType enum
- Removed fundAllocation from Event (campaign IS the allocation)
- Identity step: simple checkbox instead of 5-option grid
- Campaign creation: Zakat toggle + optional external URL for self-payment
- External redirect step: 'I've Donated' button calls /api/pledges/[id]/mark-initiated
- Landing page: simplified Zakat section (toggle preview, not 5 fund descriptions)
- Settings: removed org-level Zakat toggle (it's per campaign now)
- Migration: ALTER TABLE adds zakatEligible/isZakat, drops fundAllocation

pledge-now-pay-later/src/app/dashboard/settings/page.tsx

@@ -22,7 +22,6 @@ interface OrgSettings {
   gcAccessToken: string
   gcEnvironment: string
   orgType: string
-  zakatEnabled: boolean
 }
 
 export default function SettingsPage() {
@@ -118,42 +117,6 @@ export default function SettingsPage() {
         </CardContent>
       </Card>
 
-      {/* Zakat & Fund Types */}
-      <Card>
-        <CardHeader>
-          <CardTitle className="text-base flex items-center gap-2">☪️ Zakat & Fund Types</CardTitle>
-          <CardDescription className="text-xs">Let donors specify their donation type (Zakat, Sadaqah, Lillah, Fitrana)</CardDescription>
-        </CardHeader>
-        <CardContent className="space-y-4">
-          <button
-            onClick={() => {
-              setSettings(s => s ? { ...s, zakatEnabled: !s.zakatEnabled } : s)
-              fetch("/api/settings", { method: "PATCH", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ zakatEnabled: !settings.zakatEnabled }) }).then(() => { setSaved("zakat"); setTimeout(() => setSaved(null), 2000) }).catch(() => {})
-            }}
-            className={`w-full flex items-center justify-between rounded-xl border-2 p-4 transition-all ${
-              settings.zakatEnabled ? "border-trust-blue bg-trust-blue/5" : "border-gray-200"
-            }`}
-          >
-            <div className="text-left">
-              <p className="text-sm font-bold">{settings.zakatEnabled ? "Fund types enabled" : "Enable fund types"}</p>
-              <p className="text-xs text-muted-foreground mt-0.5">Donors can choose: Zakat · Sadaqah · Lillah · Fitrana · General</p>
-            </div>
-            <div className={`w-11 h-6 rounded-full transition-colors ${settings.zakatEnabled ? "bg-trust-blue" : "bg-gray-200"}`}>
-              <div className={`w-5 h-5 bg-white rounded-full shadow-sm mt-0.5 transition-transform ${settings.zakatEnabled ? "translate-x-5.5 ml-[22px]" : "translate-x-0.5 ml-[2px]"}`} />
-            </div>
-          </button>
-          {settings.zakatEnabled && (
-            <div className="rounded-xl bg-trust-blue/5 border border-trust-blue/10 p-3 space-y-1.5 text-xs text-muted-foreground animate-fade-in">
-              <p>🌙 <strong>Zakat</strong> — Obligatory 2.5% annual charity</p>
-              <p>🤲 <strong>Sadaqah / General</strong> — Voluntary donations</p>
-              <p>🌱 <strong>Sadaqah Jariyah</strong> — Ongoing charity (buildings, wells)</p>
-              <p>🕌 <strong>Lillah</strong> — For the mosque / institution</p>
-              <p>🍽️ <strong>Fitrana</strong> — Zakat al-Fitr (before Eid)</p>
-            </div>
-          )}
-        </CardContent>
-      </Card>
-
       {/* Branding */}
       <Card>
         <CardHeader>