Stripe integration: charity connects their own Stripe account

Model: PNPL never touches the money. Each charity connects their own
Stripe account by pasting their API key in Settings. When a donor
chooses card payment, they're redirected to Stripe Checkout. The money
lands in the charity's Stripe balance.

## Schema
- Organization.stripeSecretKey (new column)
- Organization.stripeWebhookSecret (new column)

## New/rewritten files
- src/lib/stripe.ts — getStripeForOrg(secretKey), per-org client
- src/app/api/stripe/checkout/route.ts — uses org's key, not env var
- src/app/api/stripe/webhook/route.ts — tries all org webhook secrets
- src/app/p/[token]/steps/card-payment-step.tsx — redirect to Stripe
  Checkout (no fake card form — Stripe handles PCI)

## Settings page
- New 'Card payments' section between Bank and Charity
- Instructions: how to get your Stripe API key
- Webhook setup in collapsed <details> (optional, for auto-confirm)
- 'Card payments live' green banner when connected
- Readiness bar shows Stripe status (5 columns now)

## Pledge flow
- PaymentStep shows card option ONLY if org has Stripe configured
- hasStripe flag passed from /api/qr/[token] → PaymentStep
- Secret key never exposed to frontend (only boolean hasStripe)

## How it works
1. Charity pastes sk_live_... in Settings → Save
2. Donor opens pledge link → sees 'Bank Transfer', 'Direct Debit', 'Card'
3. Donor picks card → enters name + email → redirects to Stripe Checkout
4. Stripe processes payment → money in charity's Stripe balance
5. (Optional) Webhook auto-confirms pledge as paid

Payment options:
- Bank Transfer: zero fees (default, always available)
- Direct Debit via GoCardless: 1% + 20p (if org configured)
- Card via Stripe: standard Stripe fees (if org configured)

temp_files/v3/AppealResource.php

@@ -27,9 +27,6 @@ use Filament\Tables\Actions\ActionGroup;
 use Filament\Tables\Actions\BulkAction;
 use Filament\Tables\Actions\EditAction;
 use Filament\Tables\Columns\TextColumn;
-use Filament\Tables\Enums\FiltersLayout;
-use Filament\Tables\Filters\Filter;
-use Filament\Tables\Filters\SelectFilter;
 use Filament\Tables\Table;
 use Illuminate\Contracts\View\View;
 use Illuminate\Database\Eloquent\Builder;
@@ -310,47 +307,7 @@ class AppealResource extends Resource
                     ->sortable()
                     ->description(fn (Appeal $a) => $a->created_at?->format('d M Y')),
             ])
-            ->filters([
-                SelectFilter::make('nurture_segment')
-                    ->label('Nurture Segment')
-                    ->options([
-                        'needs_outreach' => '🔴 Needs Outreach (£0 raised, 7+ days)',
-                        'almost_there' => '🟡 Almost There (80%+ of target)',
-                        'target_reached' => '🟢 Target Reached',
-                        'slowing' => '🟠 Slowing Down (raised something, 30+ days)',
-                        'new_this_week' => '🆕 New This Week',
-                    ])
-                    ->query(function (Builder $query, array $data) {
-                        if (!$data['value']) return;
-                        $query->where('status', 'confirmed')->where('is_accepting_donations', true);
-
-                        match ($data['value']) {
-                            'needs_outreach' => $query->where('amount_raised', 0)->where('created_at', '<', now()->subDays(7)),
-                            'almost_there' => $query->where('amount_raised', '>', 0)->whereRaw('amount_raised >= amount_to_raise * 0.8')->whereRaw('amount_raised < amount_to_raise'),
-                            'target_reached' => $query->whereRaw('amount_raised >= amount_to_raise')->where('amount_raised', '>', 0),
-                            'slowing' => $query->where('amount_raised', '>', 0)->whereRaw('amount_raised < amount_to_raise * 0.8')->where('created_at', '<', now()->subDays(30)),
-                            'new_this_week' => $query->where('created_at', '>=', now()->subDays(7)),
-                            default => null,
-                        };
-                    }),
-
-                SelectFilter::make('status')
-                    ->options([
-                        'confirmed' => 'Live',
-                        'pending' => 'Pending Review',
-                    ]),
-
-                Filter::make('accepting_donations')
-                    ->label('Currently accepting donations')
-                    ->toggle()
-                    ->query(fn (Builder $q) => $q->where('is_accepting_donations', true))
-                    ->default(),
-
-                Filter::make('has_raised')
-                    ->label('Has raised money')
-                    ->toggle()
-                    ->query(fn (Builder $q) => $q->where('amount_raised', '>', 0)),
-            ], layout: FiltersLayout::AboveContentCollapsible)
+            ->filters([])
             ->actions([
                 Action::make('view_page')
                     ->label('View Page')