fix(tui): scope file autocomplete to session (#33458)

packages/tui/src/context/location.tsx

@@ -0,0 +1,14 @@
+import type { LocationRef } from "@opencode-ai/sdk/v2"
+import { createContext, useContext, type Accessor, type ParentProps } from "solid-js"
+
+const context = createContext<Accessor<LocationRef | undefined>>()
+
+export function LocationProvider(props: ParentProps<{ location?: LocationRef }>) {
+  return <context.Provider value={() => props.location}>{props.children}</context.Provider>
+}
+
+export function useLocation() {
+  const value = useContext(context)
+  if (!value) throw new Error("Location context must be used within a LocationProvider")
+  return value
+}