feat(inbounds): clearer client validation errors on save

When an inbound save fails Zod validation, the toast previously showed a
raw path like `settings.clients.494.tgId: Invalid input`, which gave no
hint which of hundreds of clients was at fault. Resolve the client array
index back to the client email, name the field, and append a "(+N more)"
count when several fields fail. console.error now logs a readable list of
every issue instead of dumping the whole form.

Adds the invalidClientField/invalidField/moreIssues toast strings across
all 13 translations.

web/translation/fa-IR.json

@@ -442,7 +442,10 @@
         "trafficGetError": "خطا در دریافت ترافیک‌ها",
         "getNewX25519CertError": "خطا در دریافت گواهی X25519.",
         "getNewmldsa65Error": "خطا در دریافت گواهی mldsa65.",
-        "getNewVlessEncError": "خطا در دریافت گواهی VlessEnc."
+        "getNewVlessEncError": "خطا در دریافت گواهی VlessEnc.",
+        "invalidClientField": "کلاینت {client}: فیلد {field} — {reason}",
+        "invalidField": "{field} — {reason}",
+        "moreIssues": "{message}  (+{count} مورد دیگر)"
       },
       "form": {
         "moveUp": "بالا",