feat: add configurable terminal persistence for native provider

Adds preserve_on_close option to terminal configuration that allows users
to preserve terminal processes when windows are manually closed. Defaults
to false for backward compatibility.

- Add preserve_on_close config option (default: false)
- Update native provider to use configurable buffer behavior
- Fix hide_terminal to preserve process during programmatic hiding
- Update README with new configuration option and documentation

This provides the same functionality as the snacks provider fix but makes
it configurable so users can choose their preferred behavior.

Author: alvarosevilla95

README.md

@@ -324,6 +324,7 @@ For most users, the default configuration is sufficient:
       split_width_percentage = 0.30,            -- Width as percentage (0.0 to 1.0)
       provider = "auto",                        -- "auto", "snacks", or "native"
       show_native_term_exit_tip = true,         -- Show exit tip for native terminal
+      preserve_on_close = false,                -- Preserve terminal process when window is closed (native provider only)
       auto_close = true,                        -- Auto-close terminal after command completion
     },
 
@@ -369,6 +370,7 @@ For most users, the default configuration is sufficient:
   - `"snacks"`: Force snacks.nvim (requires folke/snacks.nvim)
   - `"native"`: Use built-in Neovim terminal
 - **`show_native_term_exit_tip`**: Show help text for exiting native terminal
+- **`preserve_on_close`**: When `true`, preserves the terminal process if the window is manually closed (native provider only, default: `false`)
 - **`auto_close`**: Automatically close terminal when commands finish
 
 #### Diff Options

lua/claudecode/terminal.lua

@@ -22,6 +22,7 @@ local config = {
   split_width_percentage = 0.30,
   provider = "auto",
   show_native_term_exit_tip = true,
+  preserve_on_close = false, -- When true, preserves terminal process when window is closed
   terminal_cmd = nil,
   auto_close = true,
 }
@@ -179,6 +180,7 @@ end
 -- @field user_term_config.split_width_percentage number Percentage of screen width (0.0 to 1.0, default: 0.30).
 -- @field user_term_config.provider string 'snacks' or 'native' (default: 'snacks').
 -- @field user_term_config.show_native_term_exit_tip boolean Show tip for exiting native terminal (default: true).
+-- @field user_term_config.preserve_on_close boolean Preserve terminal process when window is closed (default: false).
 -- @param p_terminal_cmd string|nil The command to run in the terminal (from main config).
 function M.setup(user_term_config, p_terminal_cmd)
   if user_term_config == nil then -- Allow nil, default to empty table silently
@@ -208,6 +210,8 @@ function M.setup(user_term_config, p_terminal_cmd)
         config[k] = v
       elseif k == "show_native_term_exit_tip" and type(v) == "boolean" then
         config[k] = v
+      elseif k == "preserve_on_close" and type(v) == "boolean" then
+        config[k] = v
       elseif k == "auto_close" and type(v) == "boolean" then
         config[k] = v
       else

lua/claudecode/terminal/native.lua

@@ -125,7 +125,9 @@ local function open_terminal(cmd_string, env_table, effective_config, focus)
 
   winid = new_winid
   bufnr = vim.api.nvim_get_current_buf()
-  vim.bo[bufnr].bufhidden = "wipe" -- Wipe buffer when hidden (e.g., window closed)
+  -- Configure buffer behavior when window is closed
+  local bufhidden_value = config.preserve_on_close and "hide" or "wipe"
+  vim.bo[bufnr].bufhidden = bufhidden_value
   -- buftype=terminal is set by termopen
 
   if focus then
@@ -185,8 +187,10 @@ end
 local function hide_terminal()
   -- Hide the terminal window but keep the buffer and job alive
   if bufnr and vim.api.nvim_buf_is_valid(bufnr) and winid and vim.api.nvim_win_is_valid(winid) then
-    -- Set buffer to hide instead of being wiped when window closes
-    vim.api.nvim_buf_set_option(bufnr, "bufhidden", "hide")
+    -- If preserve_on_close is false (wipe mode), temporarily set to hide to preserve process
+    if not config.preserve_on_close then
+      vim.api.nvim_buf_set_option(bufnr, "bufhidden", "hide")
+    end
 
     -- Close the window - this preserves the buffer and job
     vim.api.nvim_win_close(winid, false)