Fix all audit issues: survival check performance, display consistency, atomic config write, credential validation, TP null handling, highest_open preservation, stale docstring

bot.py

@@ -174,9 +174,14 @@ class TeslaGridBot:
         log.info(f"Highest open:     ${s.highest_open_price:.2f}")
         log.info(f"Lowest level:     ${s.lowest_level_price:.2f}")
         log.info(f"GBP/USD:          {s.gbpusd:.4f}")
-        calc     = self.calculator
-        spacing  = calc.get_spacing_pct(s.equity)
-        depth    = calc.get_queue_depth(s.equity)
+        calc    = self.calculator
+        # Use survival-gated lookups — same as manage_orders uses
+        spacing = calc.get_spacing_pct(
+            s.equity, s.highest_open_price, s.all_levels(), s.gbpusd
+        )
+        depth   = calc.get_queue_depth(
+            s.equity, spacing, s.highest_open_price, s.all_levels(), s.gbpusd
+        )
         full_sim = calc._simulate_grid(
             s.highest_open_price, spacing, s.gbpusd, s.all_levels()
         )
@@ -410,6 +415,15 @@ class TeslaGridBot:
         self.banner()
 
         log.info("Connecting to Capital.com...")
+        # Fail fast if credentials are still placeholders
+        if config.API_KEY == "YOUR_API_KEY_HERE" or \
+           config.IDENTIFIER == "your@email.com" or \
+           config.PASSWORD == "YOUR_PASSWORD_HERE":
+            log.error("Credentials not set — update environment variables:")
+            log.error("  export CAPITAL_API_KEY=your_key")
+            log.error("  export CAPITAL_IDENTIFIER=your@email.com")
+            log.error("  export CAPITAL_PASSWORD=your_password")
+            sys.exit(1)
         try:
             self.client.create_session()
         except Exception as e: