Make the CLI startup banner show the actual CLI default model (#122)

The CLI already loads direct Anthropic defaults from
configs/cli_agent_config.json, but the startup banner was rendered before
that config was loaded and fell back to a hardcoded Bedrock label. This
made the CLI look misconfigured even when the session model was correct.

Constraint: The startup banner must reflect the same model source the CLI session will actually use
Rejected: Keep a hardcoded Bedrock fallback in print_banner | it misreports the active CLI default
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Banner/status UI should derive model labels from loaded config or session state, never from stale hardcoded defaults
Tested: python -m compileall agent/main.py agent/utils/terminal_display.py
Not-tested: Interactive manual CLI launch in this sandbox

agent/main.py

@@ -831,6 +831,8 @@ async def main():
     if not hf_token:
         hf_token = await _prompt_and_save_hf_token(prompt_session)
 
+    config = load_config(CLI_CONFIG_PATH)
+
     # Resolve username for banner
     hf_user = None
     try:
@@ -839,7 +841,7 @@ async def main():
     except Exception:
         pass
 
-    print_banner(hf_user=hf_user)
+    print_banner(model=config.model_name, hf_user=hf_user)
 
     # Pre-warm the HF router catalog in the background so /model switches
     # don't block on a network fetch.
@@ -855,9 +857,6 @@ async def main():
     turn_complete_event.set()
     ready_event = asyncio.Event()
 
-    # Start agent loop in background
-    config = load_config(CLI_CONFIG_PATH)
-
     # Create tool router with local mode
     tool_router = ToolRouter(config.mcpServers, hf_token=hf_token, local_mode=True)
 

agent/utils/terminal_display.py

@@ -99,7 +99,7 @@ def print_banner(model: str | None = None, hf_user: str | None = None) -> None:
     _console.file.write("\033[2J\033[H")
     _console.file.flush()
 
-    model_label = model or "bedrock/us.anthropic.claude-opus-4-6-v1"
+    model_label = model or "unknown"
     user_label = hf_user or "not logged in"
 
     # Warm gold palette matching the shimmer highlight (255, 200, 80)