feat: change heading background default links

Author: MeanderingProgrammer

README.md

@@ -1538,12 +1538,12 @@ The table below shows all the highlight groups with their default link
 | RenderMarkdownH4              | @markup.heading.4.markdown         | H4 icons                   |
 | RenderMarkdownH5              | @markup.heading.5.markdown         | H5 icons                   |
 | RenderMarkdownH6              | @markup.heading.6.markdown         | H6 icons                   |
-| RenderMarkdownH1Bg            | DiffAdd                            | H1 background line         |
-| RenderMarkdownH2Bg            | DiffChange                         | H2 background line         |
-| RenderMarkdownH3Bg            | DiffDelete                         | H3 background line         |
+| RenderMarkdownH1Bg            | DiffText                           | H1 background line         |
+| RenderMarkdownH2Bg            | DiffAdd                            | H2 background line         |
+| RenderMarkdownH3Bg            | DiffChange                         | H3 background line         |
 | RenderMarkdownH4Bg            | DiffDelete                         | H4 background line         |
-| RenderMarkdownH5Bg            | DiffDelete                         | H5 background line         |
-| RenderMarkdownH6Bg            | DiffDelete                         | H6 background line         |
+| RenderMarkdownH5Bg            | Visual                             | H5 background line         |
+| RenderMarkdownH6Bg            | CursorColumn                       | H6 background line         |
 | RenderMarkdownCode            | ColorColumn                        | Code block background      |
 | RenderMarkdownCodeBorder      | RenderMarkdownCode                 | Code border background     |
 | RenderMarkdownCodeFallback    | Normal                             | Fallback for code language |

doc/render-markdown.txt

@@ -1,4 +1,4 @@
-*render-markdown.txt*         For NVIM v0.11.1        Last change: 2025 May 19
+*render-markdown.txt*         For NVIM v0.11.1        Last change: 2025 May 21
 
 ==============================================================================
 Table of Contents                          *render-markdown-table-of-contents*
@@ -1586,17 +1586,17 @@ The table below shows all the highlight groups with their default link
 
   RenderMarkdownH6                @markup.heading.6.markdown           H6 icons
 
-  RenderMarkdownH1Bg              DiffAdd                              H1 background line
+  RenderMarkdownH1Bg              DiffText                             H1 background line
 
-  RenderMarkdownH2Bg              DiffChange                           H2 background line
+  RenderMarkdownH2Bg              DiffAdd                              H2 background line
 
-  RenderMarkdownH3Bg              DiffDelete                           H3 background line
+  RenderMarkdownH3Bg              DiffChange                           H3 background line
 
   RenderMarkdownH4Bg              DiffDelete                           H4 background line
 
-  RenderMarkdownH5Bg              DiffDelete                           H5 background line
+  RenderMarkdownH5Bg              Visual                               H5 background line
 
-  RenderMarkdownH6Bg              DiffDelete                           H6 background line
+  RenderMarkdownH6Bg              CursorColumn                         H6 background line
 
   RenderMarkdownCode              ColorColumn                          Code block
                                                                        background

lua/render-markdown/core/colors.lua

@@ -5,6 +5,8 @@ local M = {}
 M.prefix = 'RenderMarkdown'
 
 -- stylua: ignore
+-- @see :h highlight-groups
+-- @see :h treesitter-highlight-groups
 ---@private
 ---@type table<string, string>
 M.colors = {
@@ -15,12 +17,12 @@ M.colors = {
     H4              = '@markup.heading.4.markdown',
     H5              = '@markup.heading.5.markdown',
     H6              = '@markup.heading.6.markdown',
-    H1Bg            = 'DiffAdd',
-    H2Bg            = 'DiffChange',
-    H3Bg            = 'DiffDelete',
+    H1Bg            = 'DiffText',
+    H2Bg            = 'DiffAdd',
+    H3Bg            = 'DiffChange',
     H4Bg            = 'DiffDelete',
-    H5Bg            = 'DiffDelete',
-    H6Bg            = 'DiffDelete',
+    H5Bg            = 'Visual',
+    H6Bg            = 'CursorColumn',
     -- Code
     Code            = 'ColorColumn',
     CodeBorder      = 'RenderMarkdownCode',

lua/render-markdown/health.lua

@@ -5,7 +5,7 @@ local state = require('render-markdown.state')
 local M = {}
 
 ---@private
-M.version = '8.4.3'
+M.version = '8.4.4'
 
 function M.check()
     M.start('version')