Fixed Crashes related to attempt to concatenate local [...] (a nil value)

[Art3myy]

1. Crash on API Failure: The plugin crashed (attempt to concatenate local 'answer' (a nil value)) in dictdialog.lua if the API call via queryChatGPT failed or returned an error. This was because the nil or error string result was directly used in string concatenation.

Solution: Added a check immediately after queryChatGPT in dictdialog.lua to verify the result (answer) is not nil and not an error string. If the check fails, an error message is now displayed to the user instead of crashing.

2. Crash at Paragraph End: The plugin crashed (attempt to concatenate local 'next_context' (a nil value)) in dictdialog.lua when building the prompt if the highlighted word was at the end of a paragraph. This happened because ui.highlight:getSelectedWordContext correctly returned nil for the non-existent following context, which was then used in string concatenation.

Solution: Modified the context retrieval logic in dictdialog.lua to use or "" when assigning prev_context and next_context. This ensures they are always strings (even if empty), preventing the concatenation error when context is legitimately missing.

dictdialog.lua.txt

[Art3myy]

seems that I have broken a function call during fixing 'nil' issue :( fixed it now
dictdialog.lua.txt