feat(tui): add vulnerability detail dialog with markdown copy support

- Add VulnerabilityDetailScreen modal with full vulnerability details
- Add Copy button that exports report as markdown to clipboard
- Add VulnerabilitiesPanel in sidebar showing found vulnerabilities
- Add clickable VulnerabilityItem widgets with severity-colored dots
- ESC key closes modal dialogs
- Remove emojis from TUI stats panel for cleaner display
- Add build_tui_stats_text() for minimal TUI-specific stats

strix/interface/utils.py

@@ -361,6 +361,33 @@ def build_live_stats_text(tracer: Any, agent_config: dict[str, Any] | None = Non
     return stats_text
 
 
+def build_tui_stats_text(tracer: Any, agent_config: dict[str, Any] | None = None) -> Text:
+    stats_text = Text()
+    if not tracer:
+        return stats_text
+
+    if agent_config:
+        llm_config = agent_config["llm_config"]
+        model = getattr(llm_config, "model_name", "Unknown")
+        stats_text.append("Model: ", style="bold white")
+        stats_text.append(model, style="dim white")
+
+    llm_stats = tracer.get_total_llm_stats()
+    total_stats = llm_stats["total"]
+
+    total_tokens = total_stats["input_tokens"] + total_stats["output_tokens"]
+
+    stats_text.append("\n")
+    stats_text.append("Tokens: ", style="bold white")
+    stats_text.append(format_token_count(total_tokens), style="dim white")
+
+    stats_text.append(" • ", style="dim white")
+    stats_text.append("Cost: ", style="bold white")
+    stats_text.append(f"${total_stats['cost']:.4f}", style="dim white")
+
+    return stats_text
+
+
 # Name generation utilities