feat(prompt): enable auto-resize for function-based choices

When choices are provided as a function (Mode.GENERATE), the main process
was skipping resize since choices arrive dynamically. This enables resize
by default for function-based choices so the prompt properly adjusts as
results stream in.

Author: johnlindquist

src/target/app.ts

@@ -1943,6 +1943,12 @@ global.basePrompt = async (
     promptConfig.resize ??= true
   }
 
+  // Enable resize for function-based choices (Mode.GENERATE)
+  // Without this, the main process skips resize when choices arrive dynamically
+  if (typeof choices === 'function') {
+    promptConfig.resize ??= true
+  }
+
   if (typeof placeholderOrConfig === "string") {
     promptConfig.placeholder = placeholderOrConfig
   }