Add DeepSeek TUI to the ACP catalog (#1096)

* Consolidate provider selection handling

* List DeepSeek TUI in docs and website

docs/custom-providers.md

@@ -339,6 +339,8 @@ The [Agent Client Protocol (ACP)](https://agentclientprotocol.com) is an open st
 
 ACP agents communicate over JSON-RPC 2.0 on stdio. Paseo spawns the agent process and talks to it through stdin/stdout.
 
+Paseo also ships an in-app ACP provider catalog for common agents, including Cursor, DeepAgents, DeepSeek TUI, DimCode, Gemini CLI, Hermes, Qwen Code, and Kimi Code. Catalog entries create the same `extends: "acp"` provider config shown below.
+
 ### Adding a generic ACP provider
 
 Set `extends: "acp"` and provide a `command`:

docs/product.md

@@ -71,7 +71,7 @@ Anyone who builds software:
 
 - Desktop (Electron), mobile (iOS/Android), web, CLI
 - Built-in providers: Claude Code (Agent SDK), Codex (app-server), GitHub Copilot (ACP), OpenCode, Pi
-- One-click ACP provider catalog: Cursor, Hermes, Qwen Coder, Kimi Code, and others — plus custom ACP providers
+- One-click ACP provider catalog: Cursor, DeepSeek TUI, Hermes, Qwen Coder, Kimi Code, and others — plus custom ACP providers
 - Voice mode: dictate prompts or talk through problems hands-free
 - MCP server exposes the daemon to other agents (create_agent, send_agent_prompt, schedules, terminals, worktrees)
 - Scheduled agents (cron-style triggers) via app, CLI, and MCP