feat(settlement): add receipt handling and detail view for settlements

src/Settlement/Entity/Settlement.php

@@ -40,6 +40,9 @@ class Settlement
     #[ORM\Column(name: 'admin_note', type: 'string', length: 500, nullable: true)]
     private ?string $adminNote = null;
 
+    #[ORM\Column(name: 'receipt', type: 'string', length: 500, nullable: true)]
+    private ?string $receipt = null;
+
     #[ORM\Column(name: 'reviewed_by', type: 'integer', nullable: true)]
     private ?int $reviewedBy = null;
 
@@ -69,6 +72,7 @@ class Settlement
     public function getStatus(): string      { return $this->status; }
     public function getBankAccount(): ?array { return $this->bankAccount; }
     public function getAdminNote(): ?string  { return $this->adminNote; }
+    public function getReceipt(): ?string    { return $this->receipt; }
 
     public function approve(int $adminUserId, ?string $note = null): self
     {
@@ -90,9 +94,10 @@ class Settlement
         return $this;
     }
 
-    public function markPaid(): self
+    public function markPaid(?string $receipt = null): self
     {
         $this->status    = self::STATUS_PAID;
+        if ($receipt !== null) $this->receipt = $receipt;
         $this->updatedAt = time();
         return $this;
     }
@@ -105,6 +110,7 @@ class Settlement
             'status'       => $this->status,
             'bank_account' => $this->bankAccount,
             'admin_note'   => $this->adminNote,
+            'receipt'      => $this->receipt,
             'reviewed_at'  => $this->reviewedAt,
             'created_at'   => $this->createdAt,
         ];