Plan mode can't move on to implementation in mecak8s

Bug description

When connecting mecatui to mecak8s in plan mode, I cannot get the plan card to appear so that I can approve the plan.

Steps to reproduce

1. Connect to mecak8s mecatui connect <mecak8s_url> --mode plan
2. Ask for a plan, e.g Create a hello world program in golang

Expected behavior

The plan is shown and I can approve the plan

Actual behavior

The plan is shown, but there is no plan card that lets me approve it and move to implementing it

Additional context

Conversation:

 ▌ you
 │ Create a hello world program in golang

 ● mecatl

   reasoning summary · 3 lines · ctrl+t expand

 ↑17.7K ↓36 · 3.7s

 ╭──────────────────────────────────────────────────────────────────────────────────────────────────╮
 │ ✓ ListDir                                                                                        │
 │ path: "."                                                                                        │
 │ directory is empty                                                                               │
 ╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
 ● mecatl

   reasoning summary · 3 lines · ctrl+t expand
   Plan:

   1. Add  main.go  containing a minimal Go  main  package.
   2. Import  fmt  and print  Hello, World!  from  main() .

   No existing files or project configuration are present, so a single source file is sufficient.
 ↑17.8K ↓96 · 5.1s · 100% cached

 ▌ you
 │ Implement the plan

 ● mecatl

   Plan:

   1. Create  main.go  with package  main .
   2. Import Go’s standard  fmt  package.
   3. Implement  main()  to print  Hello, World! .

   No project files exist, so no module or additional configuration is required for this standalone program.
 ↑17.9K ↓132 · 5.6s · 99% cached

 ▌ you
 │ I approve the plan

 ● mecatl

   Plan:

   1. Create  main.go  with package  main .
   2. Import Go’s standard  fmt  package.
   3. Implement  main()  to print  Hello, World! .

   No project files exist, so no module or additional configuration is required for this standalone program.
 ↑18K ↓85 · 10.4s · 99% cached

 ▌ you
 │ Show me the plan card so I can approve the plan

 ● mecatl

   Plan:

   1. Create  main.go  with package  main .
   2. Import Go’s standard  fmt  package.
   3. Implement  main()  to print  Hello, World! .

   No project files exist, so no module or additional configuration is required for this standalone program.
 ↑18.1K ↓169 · 3.9s · 99% cached

 ╭──────────────────────────────────────────────────────────────────────────────────────────────────╮
 │ ✗ PresentPlan                                                                                    │
 │ note: "Minimal standalone Go hello-world program."                                               │
 │ plan: 242 B / 6 lines · "Plan:…"                                                                 │
 │   … ctrl+t expand                                                                                │
 │ plan not approved: plan approval requires an interactive operator                                │
 ╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
 ● mecatl

   reasoning summary · 3 lines · ctrl+t expand
   The plan card could not be opened because this session lacks an interactive operator. Send the approval through an interactive session, then I can proceed.
 ↑18.3K ↓68 · 10.1s · 99% cached

Reproduce the issue with mecatui connect <mecak8s_url> --mode plan and a plan request, then trace the PresentPlan path and its interactive-operator requirement. Done means the plan card appears in the mecak8s plan-mode session and approving it advances to implementation.