Add starter, gift, and fossil encounters to seed data

Define special encounter data (starters, gifts, fossils) in a new
special_encounters module and merge them into route seed JSON during
generation. Add new route locations to ROUTE_ORDER for cities that
previously had no wild encounters (Saffron City, Pewter City, etc.).
Show colored method badges in the EncounterModal UI for special
encounter types.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/EncounterModal.tsx

@@ -52,6 +52,40 @@ const statusOptions: { value: EncounterStatus; label: string; color: string }[]
     },
   ]
 
+const specialMethodStyles: Record<string, { label: string; color: string }> = {
+  starter: {
+    label: 'Starter',
+    color:
+      'bg-yellow-100 text-yellow-800 dark:bg-yellow-900/40 dark:text-yellow-300',
+  },
+  gift: {
+    label: 'Gift',
+    color: 'bg-pink-100 text-pink-800 dark:bg-pink-900/40 dark:text-pink-300',
+  },
+  fossil: {
+    label: 'Fossil',
+    color:
+      'bg-amber-100 text-amber-800 dark:bg-amber-900/40 dark:text-amber-300',
+  },
+  trade: {
+    label: 'Trade',
+    color:
+      'bg-emerald-100 text-emerald-800 dark:bg-emerald-900/40 dark:text-emerald-300',
+  },
+}
+
+function EncounterMethodBadge({ method }: { method: string }) {
+  const config = specialMethodStyles[method]
+  if (!config) return null
+  return (
+    <span
+      className={`text-[9px] font-medium px-1.5 py-0.5 rounded-full ${config.color}`}
+    >
+      {config.label}
+    </span>
+  )
+}
+
 export function EncounterModal({
   route,
   existing,
@@ -198,6 +232,7 @@ export function EncounterModal({
                         <span className="text-xs text-gray-700 dark:text-gray-300 mt-1 capitalize">
                           {rp.pokemon.name}
                         </span>
+                        <EncounterMethodBadge method={rp.encounterMethod} />
                         <span className="text-[10px] text-gray-400">
                           Lv. {rp.minLevel}
                           {rp.maxLevel !== rp.minLevel && `–${rp.maxLevel}`}