feat: tambah budget kegiatan dengan alur threshold approval/voting

app/Models/Activity.php

@@ -9,7 +9,7 @@ use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 class Activity extends Model
 {
     protected $fillable = [
-        'title', 'description', 'start_date', 'end_date',
+        'title', 'description', 'budget', 'start_date', 'end_date',
         'created_by', 'status', 'approved_by', 'approved_at',
         'executed_at', 'execution_notes',
     ];
@@ -44,4 +44,9 @@ class Activity extends Model
         return $this->belongsToMany(User::class, 'activity_member')
             ->withPivot('status', 'notes');
     }
+
+    public function cashRecords(): \Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(CashRecord::class);
+    }
 }

app/Models/CashRecord.php

@@ -4,11 +4,12 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use App\Models\Activity;
 
 class CashRecord extends Model
 {
     protected $fillable = [
-        'amount', 'category_id', 'description',
+        'amount', 'category_id', 'activity_id', 'description',
         'date', 'created_by', 'verified_by', 'verified_at',
     ];
 
@@ -29,6 +30,11 @@ class CashRecord extends Model
         return $this->belongsTo(CashCategory::class, 'category_id');
     }
 
+    public function activity(): BelongsTo
+    {
+        return $this->belongsTo(Activity::class);
+    }
+
     public function creator(): BelongsTo
     {
         return $this->belongsTo(User::class, 'created_by');