fix: partner system bugs - commission field, withdrawal UX, admin amount

1. Add desired commission percent field to partner application form
   and admin review page (Bug 1)
2. Add prominent "Requested Amount" row in admin withdrawal detail (Bug 2)
3. Switch withdrawal input from kopecks to rubles with auto-conversion
   on submit (Bug 3)

Includes i18n updates for all 4 locales (ru, en, zh, fa).

src/locales/en.json

@@ -755,7 +755,9 @@
         "description": "Description",
         "descriptionPlaceholder": "Tell us about your audience and how you plan to promote...",
         "expectedReferrals": "Expected Monthly Referrals",
-        "expectedReferralsPlaceholder": "Estimated number per month"
+        "expectedReferralsPlaceholder": "Estimated number per month",
+        "desiredCommission": "Desired Commission (%)",
+        "desiredCommissionPlaceholder": "From 1 to 100%"
       }
     },
     "withdrawal": {
@@ -776,9 +778,9 @@
       "submitRequest": "Submit Request",
       "requestError": "Failed to create withdrawal request. Please try again.",
       "fields": {
-        "amount": "Amount (kopeks)",
-        "amountPlaceholder": "Enter amount in kopeks",
-        "amountHint": "Enter the amount in kopeks (100 kopeks = 1 {{currency}})",
+        "amount": "Amount",
+        "amountPlaceholder": "Enter amount in {{currency}}",
+        "amountHint": "Minimum: {{min}} {{currency}}",
         "paymentDetails": "Payment Details",
         "paymentDetailsPlaceholder": "Card number, wallet address, or other payment info..."
       },
@@ -2046,6 +2048,7 @@
         "balance": "Balance",
         "totalReferrals": "Total referrals",
         "totalEarnings": "Total earnings",
+        "requestedAmount": "Requested Amount",
         "createdAt": "Created",
         "paymentDetails": "Payment Details",
         "noPaymentDetails": "No payment details provided",
@@ -2101,7 +2104,8 @@
         "website": "Website",
         "channel": "Channel",
         "description": "Description",
-        "expectedReferrals": "Expected referrals/mo"
+        "expectedReferrals": "Expected referrals/mo",
+        "desiredCommission": "Desired commission"
       },
       "approveDialog": {
         "title": "Approve Application",