[BUG] [cortex] TUI welcome screen hardcodes Plan: Pro even for API-key-only sessions

[haha12-ai]

Project

cortex

Description

In the native interactive Cortex TUI, the welcome screen always shows:
Plan: Pro
But the same binary's login screen explicitly describes API key mode as:

For API access without subscription
Visible result:

start the native Cortex TUI with only CORTEX_API_KEY set,
reach the welcome screen without any Cortex account subscription data,
the right-side info card still shows Plan: Pro.

So the startup UI can claim a paid subscription tier even for an API-key-only session that the product itself describes as being without subscription.

Root Cause
The welcome screen right-side card is hardcoded in minimal_session/rendering.rs:

src/cortex-tui/src/views/minimal_session/rendering.rs:459
.add("Plan", "Pro")
src/cortex-tui/src/views/minimal_session/rendering.rs:772
.add("Plan", "Pro")
But the login screen explicitly describes API key login as a non-subscription path:

src/cortex-tui/src/runner/login_screen.rs
LoginMethod::ApiKey => "For API access without subscription"
So the welcome card is not rendering actual session/account plan state. It is rendering a fixed label.

Error Message

Debug Logs

System Information

- Cortex `v0.0.7`
- Platform: Linux terminal

Screenshots

570926493-0b9deace-2914-4230-bc29-0e207379b2ea.mov

Steps to Reproduce

1. Build the native TUI binary:
   cd /opt/177/cortex
   cargo build -p cortex-cli --no-default-features --features cortex-tui --bin Cortex
2. Set an API key environment variable so the native TUI skips the login screen:
   export CORTEX_API_KEY=dummy
3. Launch the native TUI:
   ./target/debug/Cortex
4. If the workspace trust screen appears, choose Yes, I trust this folder.
5. Observe the welcome screen info card on the right side.

Expected Behavior

The welcome screen should not hardcode Plan: Pro.

For API-key-only sessions it should either:

show no plan,
show an API-key / no-subscription state,
or display real billing data only after it has actually been loaded.

Actual Behavior

The welcome screen always renders:

Plan: Pro
even when the session is launched only with CORTEX_API_KEY=dummy.

Additional Context

No response