restore managed textarea keymap handling (#26771)

packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx

@@ -712,7 +712,6 @@ export function Prompt(props: PromptProps) {
       ...input.traits,
       ...computePromptTraits({
         mode: store.mode,
-        disabled: !!props.disabled,
         autocompleteVisible: !!auto()?.visible,
       }),
     }

packages/opencode/src/cli/cmd/tui/component/prompt/traits.ts

@@ -4,7 +4,6 @@ export type PromptMode = "normal" | "shell"
 
 export interface PromptTraitsInput {
   mode: PromptMode
-  disabled: boolean
   autocompleteVisible: boolean
 }
 
@@ -16,10 +15,9 @@ export type PromptTraits = EditorTraits & {
 /**
  * Compute the textarea editor traits for the prompt.
  *
- * `traits.suspend` gates the textarea's keybinding actions (backspace,
- * delete-word, arrow movement, undo/redo, etc.). Shell mode is an active
- * editing mode — only `disabled` should suspend the textarea, otherwise
- * users can type in shell mode but cannot delete or move the cursor.
+ * The OpenTUI managed textarea keymap owns `traits.suspend`. Prompt traits
+ * only expose capture/status metadata so focus changes cannot unsuspend the
+ * keymap-managed editor mappings.
  */
 export function computePromptTraits(input: PromptTraitsInput): PromptTraits {
   const capture =
@@ -30,7 +28,6 @@ export function computePromptTraits(input: PromptTraitsInput): PromptTraits {
       : undefined
   return {
     capture,
-    suspend: input.disabled,
     status: input.mode === "shell" ? "SHELL" : undefined,
     owner: "opencode",
     role: "prompt",