Workaround options for handling default appman_location path

`export appman_location="$HOME/foo"; appman` works as expected but if the variable value is empty is it not using the default value. ``` wget -q https://raw.githubusercontent.com/ivan-hc/AM/main/AM-INSTALLER && chmod a+x ./AM-INSTALLER && ./AM-INSTALLER --install appman && rm ./AM-INSTALLER source $HOME/.bashrc export appman_location=""; appman ``` Output ``` ... -------------------------------------------------------------------------------------------------------------------------- >>> Thank you for choosing AppMan! -------------------------------------------------------------------------------------------------------------------------- Before proceeding with any task, where do you want to install apps? SYNTAX: /FULLPATH/TO/DIRNAME EXAMPLE: /home/x/My-apps NOTE: Any spaces in the path will be replaced for dashes NOTE: If no input is given then "~/Applications" will be used as default if you wish to later change the location, first remove all the programs and then edit the "/home/x/.config/appman/appman-config" file. -------------------------------------------------------------------------------------------------------------------------- Write the path or just press enter to use default: ``` ### Proposed Workarounds * **Handle Empty Variables:** Configure the script to fall back to the default path if the variable is left empty (e.g., `export appman_location="$HOME/foo"`). * *Note:* AM-INSTALLER previously handled default locations for empty variable values elsewhere in the codebase; searching for `""` may help locate the reference. * **Preserve Existing Paths:** Use a variable to define and retain the default path structure (e.g., `export appman_location="$appman_location"`).