feat: Remote-Execute für Linux/Bash – OS-basierte Tool-Descriptions und remote.sh Script

Remote-Verbindungen erkennen jetzt das OS des Clients und passen die Tool-Description
dynamisch an (PowerShell für Windows, Bash für Linux). Neues remote.sh Script für
Linux/macOS-Clients mit embedded Python WebSocket-Client.

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

Services/ChatService.cs

@@ -51,7 +51,7 @@ public class ChatService
     /// <summary>
     /// Baut den vollständigen ChatContext auf: Agent, Model, SystemPrompt, Chain, Workspace etc.
     /// </summary>
-    public async Task<ChatContext> PrepareContext(string sessionId, string userId, int maxIterations = 100, bool planMode = false, bool hasRemoteConnection = false)
+    public async Task<ChatContext> PrepareContext(string sessionId, string userId, int maxIterations = 100, bool planMode = false, bool hasRemoteConnection = false, string remoteOs = null)
     {
         var session = await _db.GetSession(sessionId);
         if (session == null || (userId != null && session.UserId != userId) || string.IsNullOrEmpty(session.AgentId))
@@ -89,7 +89,7 @@ public class ChatService
             ? _toolService.GetToolDefinitions(new ToolDefinitionOptions
             {
                 IncludeFileTools = hasWorkspace, IncludeMemory = includeMemory,
-                IncludeUserChoice = agent.AllowUserChoice, IncludeRemote = hasRemoteConnection,
+                IncludeUserChoice = agent.AllowUserChoice, IncludeRemote = hasRemoteConnection, RemoteOs = remoteOs,
                 IncludeGitHubSearch = includeGitHubSearch, IncludeSerperSearch = includeSerperSearch
             })
             : Array.Empty<object>();