feat(finance): personal vs company scope for banking + finance entries

User-level data privacy on finance entities. Bireysel = sadece sahibi
görür/düzenler/siler, Şirket = takım görür (mevcut davranış).

Schema additions (4 tables, all enum company|personal default 'company'):
- bank_accounts.scope
- bank_loans.scope
- credit_cards.scope
- finance_entries.scope
+ tenantId_scope index on each.

Inherited fields (no own scope, parent's used):
- loan_installments → from bank_loan
- credit_card_statements → from credit_card

Permissions (lib/appwrite/scope-permissions.ts):
- scopedRowPermissions(tenantId, createdBy, scope):
  * company: Permission.read/update Role.team(tenantId), delete Role.team
    owner|admin (current behavior)
  * personal: read/update/delete Role.user(createdBy) only
- canAccessRow(row, userId): true if scope=company OR createdBy=userId.
  Used as a defense-in-depth check inside actions because we use the
  admin SDK (which bypasses row-level perms).

Action updates:
- bank-account-actions, loan-actions, credit-card-actions, finance-actions:
  pickFormFields includes scope; create uses scopedRowPermissions; update
  re-applies perms when scope changes; update/delete check canAccessRow
  on top of the existing tenantId check.
- loan installment payment & credit card statement payment auto-create
  finance entries that inherit the parent's scope, so a personal loan
  installment doesn't create a company income/expense.

Query updates (all accept optional currentUserId):
- listBankAccounts, listLoans, listCreditCards, listFinanceEntries:
  pull all tenant rows then in-JS filter via canAccessRow.
- getBankAccountBalances respects visible accounts only.
- listAllInstallments / listStatements: filter to only those whose
  parent loan/card is visible.

UI:
- New shared component components/finance/scope-toggle.tsx with
  ScopeToggle (form input) and ScopeBadge (visual marker).
- Bank, loan, card form sheets and the finance form sheet now include
  a Şirket/Bireysel toggle at the top.
- Bank account cards display ScopeBadge for personal entries.
- Page-level queries everywhere now pass ctx.user.id so each user only
  sees their personal rows + the team's company rows.

Reports & Dashboard:
- getDashboardData filters finance entries to scope=company only — so
  team-level metrics never include any user's personal data.
- getFinancialReport (CFO view): bank accounts, loans, cards, finance
  entries, installments and statements all filtered to company scope.
  Personal entities never appear in reports anywhere.

Invoice → finance entry sync explicitly tags scope=company since invoices
are inherently company-scope.

src/app/(dashboard)/finance/loans/components/loan-form-sheet.tsx

@@ -26,6 +26,7 @@ import { Textarea } from "@/components/ui/textarea";
 import { createLoanAction } from "@/lib/appwrite/loan-actions";
 import { initialLoanState } from "@/lib/appwrite/loan-types";
 import { formatTRY } from "@/lib/format";
+import { ScopeToggle } from "@/components/finance/scope-toggle";
 
 import type { BankAccountOption } from "./types";
 
@@ -85,6 +86,8 @@ export function LoanFormSheet({
           className="flex flex-1 flex-col"
         >
           <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
+            <ScopeToggle />
+
             <div className="grid gap-4 md:grid-cols-2">
               <div className="grid gap-2">
                 <Label htmlFor="bankName">Banka *</Label>