[doc] tyding, add \value tag

DESCRIPTION

@@ -1,10 +1,10 @@
 Package: ggfigdone
-Title: Manage & Modify Ggplot Figures using Ggfigdone
+Title: Manage & Modify 'ggplot' Figures using 'ggfigdone'
 Version: 0.1.2
 Authors@R: 
     person("Wenjie", "SUN", , "[email protected]", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0002-3100-2346"))
-Description: When you prepare a presentation or a report, you often need to manage a large number of ggplot figures. You need to change the figure size, modify the title, label, themes, etc. It is inconvenient to go back to the original code to make these changes. This package provides a simple way to manage ggplot figures. You can easily add the figure to the database and update them later using CLI (command line interface) or GUI (graphical user interface).
+Description: When you prepare a presentation or a report, you often need to manage a large number of 'ggplot' figures. You need to change the figure size, modify the title, label, themes, etc. It is inconvenient to go back to the original code to make these changes. This package provides a simple way to manage 'ggplot' figures. You can easily add the figure to the database and update them later using CLI (command line interface) or GUI (graphical user interface).
 License: GPL-3
 Encoding: UTF-8
 Depends: R (>= 4.0.0)
@@ -20,5 +20,4 @@ Imports:
 Roxygen: list(markdown = TRUE)
 RoxygenNote: 7.3.2
 Suggests: testthat (>= 3.0.0), knitr
-URL: https://github.com/wenjie1991/ggfigdone, https://wenjie1991.github.io/ggfigdone/
 BugReports: https://github.com/wenjie1991/ggfigdone/issues

R/lib.R

@@ -11,13 +11,15 @@
 #' Set the default ggfigdone database
 #' 
 #' @param fdObj An object of class `fdObj` to be set as the default ggfigdone database.
+#' @return No return value, the default ggfigdone database is set to an environment variable.
 #' @export
 fd_set_db = function(fdObj) {
     .db$set(fdObj)
 }
 
 #' Get the default ggfigdone database
 #'
+#' @return An object of class `fdObj` representing the default ggfigdone database.
 #' @export
 fd_get_db = function() {
     .db$get()
@@ -214,7 +216,7 @@ fd_update = function(fdObj_loc, do_lock = TRUE) {
 #' 
 #' @param fdObj An object of class `fdObj`.
 #' @param do_lock A logical value. If TRUE, the function will lock the database file when saving the data.
-#'
+#' @return No return value, changes are made directly to the ggfigdone database.
 #' @export
 fd_save = function(fdObj = fd_get_db(), do_lock = TRUE) {
     message("Automatic saving the ggfigdone data to the disk ...")
@@ -472,7 +474,7 @@ fd_add = function(name, g = last_plot(), fdObj = fd_get_db(),
     height = 10,
     units = "cm",
     dpi = 200,
-    overwrite = F,
+    overwrite = FALSE,
     id = uuid::UUIDgenerate()) 
 {
     fd_update(fdObj)
@@ -605,6 +607,7 @@ fd_df = function(fdObj = fd_get_db()) {
 #'
 #' @param id A character string representing the figure ID.
 #' @param fdObj An object of class `fdObj`.
+#' @return No return value, changes are made directly to the ggfigdone database.
 #' @export
 fd_rm = function(id, fdObj = fd_get_db()) {
     fd_update(fdObj)
@@ -668,6 +671,7 @@ fd_update_fig = function(id, expr, fdObj = fd_get_db()) {
 #' @param height A numeric value specifying the height of the canvas.
 #' @param units A character string indicating the units of measurement for the canvas, such as "cm", "in", "mm", or "px".
 #' @param dpi A numeric value denoting the dots per inch (DPI) of the canvas.
+#' @return No return value, changes are made directly to the ggfigdone database.
 #' @export
 fd_canvas = function(
     id, 

R/server.R

@@ -155,6 +155,7 @@ response_fd_rm = function(fo, req) {
 #' @param host The host on which the server will run; the default is '0.0.0.0'.
 #' @param port The port on which the server will run; the default is 8080.
 #' @param auto_open A logical value indicating whether the server should be opened in a web browser; the default is TRUE.
+#' @return No return value, the function is called for its side effects.
 #' @export
 fd_server = function(dir, host = '0.0.0.0', port = 8080, auto_open = TRUE) {
     fo = fd_load(dir)