fix(renderer): use visual width for table wrap check

lua/markview/renderers/markdown.lua

@@ -1658,7 +1658,12 @@ markdown.table = function (buffer, item)
 
 		local table_width = 1;
 
-		for _, col in ipairs(vim_width) do
+		--- NOTE: Use the VISIBLE column widths (post-conceal) here, not the raw
+		--- `vim_width`. `vim_width` includes concealed content such as the full
+		--- `](https://…)` of a link, so a table cell with a long URL would make
+		--- `table_width` exceed the window and skip rendering entirely, leaving
+		--- the row with no padding/borders and a badly shifted right border.
+		for _, col in ipairs(col_widths) do
 			table_width = table_width + 1 + col;
 		end
 

test/table_wrap_link_border.md

@@ -0,0 +1,46 @@
+; Long links in table cells — right border shifts off when `wrap` is on
+
+When a table cell contains a link (`[text](url)`) or image, the renderer conceals
+the `](https://…)` portion, so the *visible* cell is only as wide as the label
+plus the link icon (e.g. `󰌷 label`). The column-width calculation in
+`renderers/markdown/tostring.lua` correctly measures this concealed width and
+stores it in `col_widths`.
+
+However, with `wrap` enabled the table renderer runs a "is this table too wide to
+bother rendering?" guard. That guard summed the RAW column widths (`vim_width`),
+which include the *unconcealed* URL — often 90+ columns for a real link. A single
+long-URL cell therefore made the estimated table width exceed the window and the
+renderer bailed out completely (`return`), drawing NO padding and NO borders for
+the whole table. The visible `|` characters are then just the raw trailing pipes
+of each source line, landing at wildly different columns per row, so the right
+border appears shifted far off — and the longer the URL, the further it drifts.
+
+Fix: base the width guard on `col_widths` (the visible, post-conceal widths)
+instead of `vim_width` (the raw widths). Long-URL tables whose concealed width
+fits the window then render with correct padding and aligned borders.
+
+To reproduce, open this file (its modeline enables `wrap`) in a window that is
+comfortably wider than the *concealed* table but narrower than the *raw* table
+(the long URLs are much wider than the visible cells). Move the cursor OFF the
+table so the URLs conceal. Every right border of column 2 must line up in a
+single straight vertical column; the short-URL and long-URL rows must agree.
+
+### Long hyperlink URLs (primary repro)
+
+| Kind        | Link                                                                                             |
+|-------------|--------------------------------------------------------------------------------------------------|
+| Hyperlink   | [Neovim API reference](https://neovim.io/doc/user/api.html#nvim_buf_set_extmark()-full-details)  |
+| Image       | ![screenshot](https://raw.githubusercontent.com/nvim-treesitter/playground/master/screenshot.png) |
+| Bold + link | **[bold link with long URL](https://spec.commonmark.org/0.31.2/#emphasis-and-strong-emphasis)**  |
+| Short (ctl) | [ref](https://a.co)                                                                              |
+| Plain (ctl) | no link here                                                                                     |
+
+### Mixed short/long links (borders must still align)
+
+| Name   | Reference                                                                                  |
+|--------|--------------------------------------------------------------------------------------------|
+| short  | [a](https://a.co)                                                                          |
+| medium | [docs](https://example.com/some/moderately/long/path/to/a/page.html)                       |
+| long   | [spec](https://spec.commonmark.org/0.31.2/#emphasis-and-strong-emphasis-combined-with-links) |
+
+<!-- vim: set wrap: -->