refactor: remove mock trading functionality from backend and frontend

Removes all mock price simulation features:
- Delete MockPriceManager from backend/data/
- Remove mock_mode, enable_mock, is_mock_mode flags from services
- Remove mock CLI options and config
- Remove mock mode UI components and state from frontend
- Update tests to remove mock references

Now system supports only live and backtest modes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/cli.py

@@ -1019,11 +1019,6 @@ def backtest(
 
 @app.command()
 def live(
-    mock: bool = typer.Option(
-        False,
-        "--mock",
-        help="Use mock mode with simulated prices (for testing)",
-    ),
     config_name: str = typer.Option(
         "live",
         "--config-name",
@@ -1078,7 +1073,6 @@ def live(
 
     Example:
         evotraders live                    # Run immediately (default)
-        evotraders live --mock             # Mock mode
         evotraders live -t 22:30           # Run at 22:30 local time daily
         evotraders live --schedule-mode intraday --interval-minutes 60
         evotraders live --trigger-time now # Run immediately
@@ -1086,33 +1080,31 @@ def live(
     """
     schedule_mode = str(_normalize_typer_value(schedule_mode, "daily"))
     interval_minutes = int(_normalize_typer_value(interval_minutes, 60))
-    mode_name = "MOCK" if mock else "LIVE"
     console.print(
         Panel.fit(
-            f"[bold cyan]EvoTraders {mode_name} Mode[/bold cyan]",
+            "[bold cyan]EvoTraders LIVE Mode[/bold cyan]",
             border_style="cyan",
         ),
     )
 
     # Check for required API key in live mode
-    if not mock:
-        env_file = get_project_root() / ".env"
-        if not env_file.exists():
-            console.print("\n[yellow]Warning: .env file not found[/yellow]")
-            console.print("Creating from template...\n")
-            template = get_project_root() / "env.template"
-            if template.exists():
-                shutil.copy(template, env_file)
-                console.print("[green].env file created[/green]")
-                console.print(
-                    "\n[red]Error: Please edit .env and set FINNHUB_API_KEY[/red]",
-                )
-                console.print(
-                    "Get your free API key at: https://finnhub.io/register\n",
-                )
-            else:
-                console.print("[red]Error: env.template not found[/red]")
-            raise typer.Exit(1)
+    env_file = get_project_root() / ".env"
+    if not env_file.exists():
+        console.print("\n[yellow]Warning: .env file not found[/yellow]")
+        console.print("Creating from template...\n")
+        template = get_project_root() / "env.template"
+        if template.exists():
+            shutil.copy(template, env_file)
+            console.print("[green].env file created[/green]")
+            console.print(
+                "\n[red]Error: Please edit .env and set FINNHUB_API_KEY[/red]",
+            )
+            console.print(
+                "Get your free API key at: https://finnhub.io/register\n",
+            )
+        else:
+            console.print("[red]Error: env.template not found[/red]")
+        raise typer.Exit(1)
 
     # Handle historical data cleanup
     handle_history_cleanup(config_name, auto_clean=clean)
@@ -1168,12 +1160,9 @@ def live(
 
     # Display configuration
     console.print("\n[bold]Configuration:[/bold]")
-    if mock:
-        console.print("   Mode: [yellow]MOCK[/yellow] (Simulated prices)")
-    else:
-        console.print(
-            "   Mode: [green]LIVE[/green] (Real-time prices via Finnhub)",
-        )
+    console.print(
+        "   Mode: [green]LIVE[/green] (Real-time prices via Finnhub)",
+    )
     console.print(f"   Config: {config_name}")
     console.print(f"   Server: {host}:{port}")
     console.print(f"   Poll Interval: {poll_interval}s")
@@ -1188,22 +1177,17 @@ def live(
     project_root = get_project_root()
     os.chdir(project_root)
 
-    # Data update (if not mock mode)
-    if not mock:
-        run_data_updater(project_root)
-        auto_update_market_store(
-            config_name,
-            end_date=nyse_now.date().isoformat(),
-        )
-        auto_enrich_market_store(
-            config_name,
-            end_date=nyse_now.date().isoformat(),
-            force=False,
-        )
-    else:
-        console.print(
-            "\n[dim]Mock mode enabled - skipping data update[/dim]\n",
-        )
+    # Data update
+    run_data_updater(project_root)
+    auto_update_market_store(
+        config_name,
+        end_date=nyse_now.date().isoformat(),
+    )
+    auto_enrich_market_store(
+        config_name,
+        end_date=nyse_now.date().isoformat(),
+        force=False,
+    )
 
     # Build command using backend.main
     cmd = [
@@ -1229,8 +1213,6 @@ def live(
         str(interval_minutes),
     ]
 
-    if mock:
-        cmd.append("--mock")
     if enable_memory:
         cmd.append("--enable-memory")