fix: Update test version references from 0.1.0 to 0.1.1

Update hardcoded version strings in test files to match the new 0.1.1 version:
- llmx-app-server user_agent test
- llmx-app-server test helper initialize
- llmx-mcp-server test helper initialize
- llmx-tui status snapshot tests (auto-updated via cargo insta)

All previously failing tests now pass.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

llmx-rs/app-server/tests/common/mcp_process.rs

@@ -138,7 +138,7 @@ impl McpProcess {
             client_info: ClientInfo {
                 name: "llmx-app-server-tests".to_string(),
                 title: None,
-                version: "0.1.0".to_string(),
+                version: "0.1.1".to_string(),
             },
         })?);
         let req_id = self.send_request("initialize", params).await?;