Add desktop session detection to auto-boot-ollama-host script

Implement a new module for checking if the user is logged into a Windows desktop session. The script now skips Ollama startup and shutdown if the user is currently logged in, preventing interruptions. Update README to reflect new features and module structure.

scripts/session_check.lua

@@ -0,0 +1,45 @@
+-- Windows desktop session check module for auto-boot-ollama-host
+-- Checks if a specific user is currently logged into a Windows desktop session
+
+local utils = require("utils")
+local ssh = require("ssh")
+
+local session_check = {}
+
+-- Check if user is currently logged into a Windows desktop session using quser
+-- Returns true if user is logged in, false otherwise
+function session_check.is_user_logged_in(config)
+  utils.log(("Checking if user '%s' is logged into desktop session using quser..."):format(config.SSH_USER))
+  
+  -- Use quser command to check for active sessions
+  -- This works regardless of Windows language (looks for console/rdp sessions)
+  local command = "quser 2>nul | findstr /i \"console rdp-tcp#\" >nul && echo 1 || echo 0"
+  
+  local ok, output, err = ssh.execute_with_output(command, config.SSH_USER, config.OLLAMA_HOST, config.SSH_PORT, config.SSH_IDENTITY_FILE)
+  
+  if not ok then
+    utils.log(("Failed to execute quser session check command: %s"):format(tostring(err)))
+    return false
+  end
+  
+  if output and output ~= "" then
+    utils.log("Quser session check output received: " .. output)
+    
+    -- Parse the result (remove any whitespace/newlines)
+    local clean_output = output:gsub("%s+", "")
+    local result = tonumber(clean_output)
+    
+    if result == 1 then
+      utils.log(("User '%s' has an active desktop session"):format(config.SSH_USER))
+      return true
+    else
+      utils.log(("User '%s' has no active desktop sessions"):format(config.SSH_USER))
+      return false
+    end
+  else
+    utils.log("No output received from quser session check command")
+    return false
+  end
+end
+
+return session_check