feat: remove legacy OpenCode runtime

Cut product flows over to Coding/Pi and retain only the migration-owned v1 boundary. Promote supported native optional packages because electron-builder omitted pnpm transitive optional closure from the packaged ASAR.

src/lib/model-options.ts

@@ -1,6 +1,4 @@
 import type { ProviderAccount, ProviderVendorInfo, ProviderWithKeyInfo } from '@/lib/providers';
-import type { OpencodeRuntimeConfigSummary } from '@/types/opencode';
-import { resolveOpencodeProviderId } from '../../shared/opencode-provider-id';
 import {
   getKnownModelCapabilityKind,
   getModelCapabilityLabel,
@@ -29,7 +27,7 @@ export interface RuntimeProviderOption {
 }
 
 export function resolveRuntimeProviderKey(account: ProviderAccount): string {
-  return resolveOpencodeProviderId(account);
+  return account.id;
 }
 
 export function splitModelRef(modelRef: string | null | undefined): { providerKey: string; modelId: string } | null {
@@ -54,18 +52,14 @@ export function toModelOptionTestId(label: string): string {
 
 export function getConfiguredModelCapability(
   option: ConfiguredModelOption,
-  runtimeSummary?: OpencodeRuntimeConfigSummary | null,
 ): ModelCapabilityKind {
-  const provider = runtimeSummary?.providers?.find((item) => item.id === option.runtimeProviderKey);
-  if (!provider || !Array.isArray(provider.imageInputModelIds)) return option.capability;
-  return provider.imageInputModelIds.includes(option.label) ? 'multimodal' : 'text';
+  return option.capability;
 }
 
 export function getConfiguredModelCapabilityLabel(
   option: ConfiguredModelOption,
-  runtimeSummary?: OpencodeRuntimeConfigSummary | null,
 ): string {
-  return getModelCapabilityLabel(getConfiguredModelCapability(option, runtimeSummary));
+  return getModelCapabilityLabel(getConfiguredModelCapability(option));
 }
 
 export function hasConfiguredProviderCredentials(