fix(tmux): run set-option as separate commands on Windows for psmux compatibility

Author: John Mutuma (from Dev Box)

lua/sidekick/cli/session/tmux.lua

@@ -33,8 +33,20 @@ function M:start()
     local cmd = { "tmux", "new", "-A", "-s", self.id }
     vim.list_extend(cmd, { "-c", self.cwd })
     self:add_cmd(cmd)
-    vim.list_extend(cmd, { ";", "set-option", "status", "off" })
-    vim.list_extend(cmd, { ";", "set-option", "detach-on-destroy", "on" })
+    if vim.fn.has("win32") == 1 then
+      -- On Windows (psmux), ";" command chaining is not supported.
+      -- PowerShell interprets ";" as a statement separator, causing
+      -- "set-option" to be run as a standalone cmdlet (which fails).
+      -- Instead, run set-option as separate commands after the session starts.
+      local id = self.id
+      vim.defer_fn(function()
+        vim.fn.system({ "tmux", "set-option", "-t", id, "status", "off" })
+        vim.fn.system({ "tmux", "set-option", "-t", id, "detach-on-destroy", "on" })
+      end, 1000)
+    else
+      vim.list_extend(cmd, { ";", "set-option", "status", "off" })
+      vim.list_extend(cmd, { ";", "set-option", "detach-on-destroy", "on" })
+    end
     return { cmd = cmd }
   elseif Config.cli.mux.create == "window" then
     local cmd = { "tmux", "new-window", "-dP", "-c", self.cwd, "-F", PANE_FORMAT }