🎨 Palette: Add dynamic progress bar for quiet mode

.Jules/palette.md

@@ -5,3 +5,7 @@
 ## 2025-02-28 - Structured CLI Reports
 **Learning:** Dense numerical data in CLI output is hard to parse. Using ASCII box-drawing characters and alignment to create a "dashboard" or "invoice" style summary significantly improves readability and perceived quality.
 **Action:** When summarizing simulation or batch job results, always format the final report as a structured table or box rather than a list of print statements.
+
+## 2025-03-05 - CLI Progress Indicators
+**Learning:** Running long CLI simulations with `--quiet` leads to confusing silence before the final output. Users might think the program froze. Using `\r` (carriage return) for a text-based progress bar, conditionally rendered if `sys.stdout.isatty()`, provides necessary visibility without cluttering standard output logs or CI/CD systems.
+**Action:** Always add dynamic text-based progress indicators (`\r` loops) for long operations in CLI tools that suppress verbose logging. Check `sys.stdout.isatty()` to prevent log pollution.

bitcoin_trading_simulation.py

@@ -94,21 +94,32 @@ def simulate_trading(signals, initial_cash=10000, quiet=False):
             btc_to_buy = portfolio.loc[i, 'cash'] / row['price']
             portfolio.loc[i, 'btc'] += btc_to_buy
             portfolio.loc[i, 'cash'] -= btc_to_buy * row['price']
-            print(f"{Colors.GREEN}🟢 Day {i}: Buy {btc_to_buy:.4f} BTC at ${row['price']:.2f}{Colors.ENDC}")
+            if not quiet:
+                print(f"{Colors.GREEN}🟢 Day {i}: Buy {btc_to_buy:.4f} BTC at ${row['price']:.2f}{Colors.ENDC}")
 
         # Sell signal
         elif row['positions'] == -2.0:
             if portfolio.loc[i, 'btc'] > 0:
                 cash_received = portfolio.loc[i, 'btc'] * row['price']
                 portfolio.loc[i, 'cash'] += cash_received
-                print(f"{Colors.FAIL}🔴 Day {i}: Sell {portfolio.loc[i, 'btc']:.4f} BTC at ${row['price']:.2f}{Colors.ENDC}")
+                if not quiet:
+                    print(f"{Colors.FAIL}🔴 Day {i}: Sell {portfolio.loc[i, 'btc']:.4f} BTC at ${row['price']:.2f}{Colors.ENDC}")
                 portfolio.loc[i, 'btc'] = 0
 
         portfolio.loc[i, 'total_value'] = portfolio.loc[i, 'cash'] + portfolio.loc[i, 'btc'] * row['price']
 
         if not quiet:
             print(f"Day {i}: Portfolio Value: ${portfolio.loc[i, 'total_value']:.2f}, "
                   f"Cash: ${portfolio.loc[i, 'cash']:.2f}, BTC: {portfolio.loc[i, 'btc']:.4f}")
+        elif sys.stdout.isatty():
+            progress = (signals.index.get_loc(i) + 1) / len(signals)
+            bar_length = 30
+            filled_length = int(bar_length * progress)
+            bar = '█' * filled_length + '-' * (bar_length - filled_length)
+            print(f"\r{Colors.CYAN}Simulating: |{bar}| {progress:.1%}{Colors.ENDC}", end='', flush=True)
+
+    if quiet and sys.stdout.isatty():
+        print()
 
     return portfolio