Effect Migration for Kilo callsites (follow-up) (#10587)

* refactor(opencode): migrate ModelCache and Config to effect-native services

Remove legacy async wrapper functions from Config module and convert
ModelCache from a stateful namespace with module-level Maps into a
proper Effect service with Context/Layer semantics.

Key changes:
- Delete Config's `makeRuntime`-based async wrappers (get, getGlobal,
  update, warnings, etc.) — all callsites now use
  `Config.Service.use(...)` through AppRuntime
- Rewrite ModelCache as an Effect service with HttpClient dependency
  injection, replacing imperative Map-based caching with Effect-native
  Ref cells and TTL logic
- Convert KiloSessions.init and KilocodeBootstrap.init into proper
  Effect services with Layer-based dependency injection
- Wire ModelCache.Service into AppLayer, ProviderAuth, ModelsDev, and
  HTTP API handler layers
- Update Permission.layer to depend on Config.Service directly instead
  of calling Config async wrappers
- Add new test files for KiloSessions and ModelCache Effect integration
- Remove stale Config.get spyOn mocks from tests that no longer need
  them (experimental-session-list, recall)
- Fix indexing-auth to use typed IndexingConfig parameter instead of
  untyped record access

* fix(model-cache): resolve race conditions in concurrent fetch and cache invalidation

Introduce versioned cache cells with proper key derivation to prevent
stale responses from overwriting fresher data during concurrent fetches.

- Add version tracking to detect and discard outdated fetch results
- Derive cache keys from provider-specific options (baseURL, token, apiKey)
  to isolate concurrent requests with different credentials
- Make ModelCache.clear async to properly await invalidation across layers
- Update OrganizationDeps.clear signature to allow Promise<void> return
- Add concurrency and ordering tests for fetch/refresh race scenarios
- Rename local variable from `state` to `entry` in kilo-sessions sync loop

* chore(opencode): remove duplicate imports and fix test layer composition

Remove duplicate `AppRuntime` imports introduced during merge and update
kilo-sessions tests to use Effect-native Auth service instead of static
module calls.

- Remove duplicate `AppRuntime` import in index.ts and instance.ts
- Add Auth.defaultLayer to test layer helper
- Refactor test to yield Auth.Service and use instance methods
- Reorder Effect.provide/Effect.ensuring for correct resource cleanup

* style(opencode): normalize kilocode_change marker comments to block format

Standardize inline `// kilocode_change` annotations across source and
test files to use consistent `// kilocode_change start` / `// kilocode_change end`
block delimiters, improving readability and grep-ability of custom
modifications.

packages/opencode/src/effect/app-runtime.ts

@@ -15,6 +15,7 @@ import { Storage } from "@/storage/storage"
 import { Snapshot } from "@/snapshot"
 import { Plugin } from "@/plugin"
 import { ModelsDev } from "@/provider/models"
+import { ModelCache } from "@/provider/model-cache" // kilocode_change
 import { Provider } from "@/provider/provider"
 import { ProviderAuth } from "@/provider/auth"
 import { Agent } from "@/agent/agent"
@@ -68,6 +69,7 @@ export const AppLayer = Layer.mergeAll(
   Storage.defaultLayer,
   Snapshot.defaultLayer,
   Plugin.defaultLayer,
+  ModelCache.defaultLayer, // kilocode_change
   ModelsDev.defaultLayer,
   Provider.defaultLayer,
   ProviderAuth.defaultLayer,