feat: add DeepSeek TUI as CLI tool in dashboard (#1088)

Co-authored-by: Ansh7473 <your-github-email@example.com>

open-sse/utils/clientDetector.js

@@ -5,10 +5,10 @@
 
 // Map of CLI tool identifiers to provider IDs they are "native" to
 const NATIVE_PAIRS = {
-  "claude":      ["claude", "anthropic"],
-  "gemini-cli":  ["gemini-cli"],
+  "claude": ["claude", "anthropic"],
+  "gemini-cli": ["gemini-cli"],
   "antigravity": ["antigravity"],
-  "codex":       ["codex"],
+  "codex": ["codex"],
 };
 
 /**
@@ -40,6 +40,9 @@ export function detectClientTool(headers = {}, body = {}) {
   // Codex CLI
   if (ua.includes("codex-cli")) return "codex";
 
+  // DeepSeek TUI
+  if (ua.includes("deepseek-tui")) return "deepseek-tui";
+
   return null;
 }