fix: parse composite auth keys correctly in provider list and load apikeys

providers.ts:
- Use lastIndexOf + slice instead of split(':') for profile parsing

provider.ts:
- Extract base provider ID from composite auth keys (e.g., 'minimax-coding-plan:personal' → 'minimax-coding-plan')
- This fixes the issue where providers weren't recognized when using profile-based auth keys

packages/opencode/src/cli/cmd/providers.ts

@@ -228,7 +228,9 @@ export const ProvidersListCommand = cmd({
 
     const byProvider: Record<string, Array<{ profile: string; type: string }>> = {}
     for (const [compositeKey, result] of results) {
-      const [baseProvider, profile] = compositeKey.includes(":") ? compositeKey.split(":") : [compositeKey, "default"]
+      const lastColon = compositeKey.lastIndexOf(":")
+      const baseProvider = lastColon === -1 ? compositeKey : compositeKey.slice(0, lastColon)
+      const profile = lastColon === -1 ? "default" : compositeKey.slice(lastColon + 1)
       if (!byProvider[baseProvider]) byProvider[baseProvider] = []
       byProvider[baseProvider]!.push({ profile, type: result.type })
     }

packages/opencode/src/provider/provider.ts

@@ -1192,7 +1192,10 @@ export namespace Provider {
           // load apikeys
           const auths = yield* auth.all().pipe(Effect.orDie)
           for (const [id, provider] of Object.entries(auths)) {
-            const providerID = ProviderID.make(id)
+            // Extract base provider from composite keys (e.g., "minimax-coding-plan:personal" → "minimax-coding-plan")
+            const lastColon = id.lastIndexOf(":")
+            const baseProvider = lastColon === -1 ? id : id.slice(0, lastColon)
+            const providerID = ProviderID.make(baseProvider)
             if (disabled.has(providerID)) continue
             if (provider.type === "api") {
               mergeProvider(providerID, {