chore: refactoring and tests, splitting up files (#12495)

packages/app/src/context/server.tsx

@@ -1,9 +1,9 @@
-import { createOpencodeClient } from "@opencode-ai/sdk/v2/client"
 import { createSimpleContext } from "@opencode-ai/ui/context"
 import { batch, createEffect, createMemo, onCleanup } from "solid-js"
 import { createStore } from "solid-js/store"
 import { usePlatform } from "@/context/platform"
 import { Persist, persisted } from "@/utils/persist"
+import { checkServerHealth } from "@/utils/server-health"
 
 type StoredProject = { worktree: string; expanded: boolean }
 
@@ -94,18 +94,8 @@ export const { use: useServer, provider: ServerProvider } = createSimpleContext(
 
     const isReady = createMemo(() => ready() && !!state.active)
 
-    const check = (url: string) => {
-      const signal = (AbortSignal as unknown as { timeout?: (ms: number) => AbortSignal }).timeout?.(3000)
-      const sdk = createOpencodeClient({
-        baseUrl: url,
-        fetch: platform.fetch,
-        signal,
-      })
-      return sdk.global
-        .health()
-        .then((x) => x.data?.healthy === true)
-        .catch(() => false)
-    }
+    const fetcher = platform.fetch ?? globalThis.fetch
+    const check = (url: string) => checkServerHealth(url, fetcher).then((x) => x.healthy)
 
     createEffect(() => {
       const url = state.active