feat(dashboard): doctor/clinic dashboard matching Figma layout

Restructure to Figma: 4 stat cards (today appts, today/week payments,
total patients) -> two charts (revenue area + patient-count vertical
bars) -> today appointments table. Add today/week payments, total
patients, and 7-day revenue/appointments series to doctor + clinic
dashboard endpoints. Add SvgVBars chart. Update dashboard.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/api/dashboard.md

@@ -36,7 +36,18 @@ Returns stats and today's schedule for the authenticated clinic owner.
       "pending_invitations": 2,
       "sms_wallet_balance": 50000,
       "unique_patients_count": 34,
-      "revenue_period_rials": 12500000
+      "total_patients": 210,
+      "revenue_period_rials": 12500000,
+      "today_payments_rials": 5225000,
+      "week_payments_rials": 560000200
+    },
+    "charts": {
+      "revenue_by_day": [
+        { "label": "۷ خرداد", "amount_rials": 3200000 }
+      ],
+      "appointments_by_day": [
+        { "label": "۷ خرداد", "count": 9 }
+      ]
     },
     "period": { "from": 1717200000, "to": 1719792000 },
     "today_appointments": [
@@ -62,7 +73,10 @@ Returns stats and today's schedule for the authenticated clinic owner.
 **Field notes:**
 - `sms_wallet_balance` — current SMS wallet balance in Rials (0 if wallet not yet created)
 - `unique_patients_count` — distinct patients with at least one session in the `from`–`to` period
+- `total_patients` — distinct patients ever (no period filter)
 - `revenue_period_rials` — sum of `final_price_rials` from all patient sessions in the period
+- `today_payments_rials` / `week_payments_rials` — revenue for today / the last 7 days
+- `charts.revenue_by_day` / `charts.appointments_by_day` — last 7 days series (Jalali day label); revenue drives the «میزان درآمد» area chart, appointments the «نمودار تعداد مراجعین» bar chart
 - `today_appointments` — up to 5 records, ordered by `slot_start ASC`
 - `doctors` — all doctors belonging to this clinic; each includes their appointment count for today
 
@@ -106,7 +120,14 @@ Returns stats and today's schedule for the authenticated doctor.
       "total_ratings": 34,
       "sms_wallet_balance": 25000,
       "unique_patients_count": 18,
-      "revenue_period_rials": 6800000
+      "total_patients": 140,
+      "revenue_period_rials": 6800000,
+      "today_payments_rials": 5225000,
+      "week_payments_rials": 42000000
+    },
+    "charts": {
+      "revenue_by_day": [ { "label": "۷ خرداد", "amount_rials": 3200000 } ],
+      "appointments_by_day": [ { "label": "۷ خرداد", "count": 4 } ]
     },
     "period": { "from": 1717200000, "to": 1719792000 },
     "today_appointments": [