fix: preserve exchange-qualified tickers across agent prompts

cli/main.py

@@ -501,7 +501,9 @@ def get_user_selections():
     # Step 1: Ticker symbol
     console.print(
         create_question_box(
-            "Step 1: Ticker Symbol", "Enter the ticker symbol to analyze", "SPY"
+            "Step 1: Ticker Symbol",
+            "Enter the exact ticker symbol to analyze, including exchange suffix when needed (examples: SPY, CNC.TO, 7203.T, 0700.HK)",
+            "SPY",
         )
     )
     selected_ticker = get_ticker()