feat(config_help): colorize --help output

Section headers in bold blue, argument/flag names in yellow, command
examples in green, navigation keys in cyan, fallback chain numbers
dimmed. All reset to normal after each colored span.

functions/config_help.fish

@@ -32,37 +32,27 @@
 function config_help --description 'Open the offline fish shell configuration manual'
     # ── --help / -h ──────────────────────────────────────────────
     if contains -- --help $argv; or contains -- -h $argv
-        set_color --bold
+        set_color --bold; echo "config_help"; set_color normal
-        echo config_help
-        set_color normal
         echo " — view the offline fish shell configuration manual"
         echo ""
-        set_color --bold brblue
+        set_color --bold brblue; echo "USAGE"; set_color normal
-        echo USAGE
-        set_color normal
         echo "  config_help "(set_color yellow)"[section]"(set_color normal)
         echo "  config_help "(set_color yellow)"--help"(set_color normal)
         echo ""
-        set_color --bold brblue
+        set_color --bold brblue; echo "ARGUMENTS"; set_color normal
-        echo ARGUMENTS
-        set_color normal
         echo "  "(set_color yellow)"section"(set_color normal)"   Optional keyword to jump to a matching section heading."
         echo "            Searches docs/fish-config.index for aliases first, then"
         echo "            falls back to a normalized (case- and punctuation-insensitive)"
         echo "            scan of heading lines."
         echo ""
-        set_color --bold brblue
+        set_color --bold brblue; echo "EXAMPLES"; set_color normal
-        echo EXAMPLES
-        set_color normal
         echo "  "(set_color green)"config_help"(set_color normal)"                  open at top"
         echo "  "(set_color green)"config_help keybindings"(set_color normal)"      jump to Key Bindings section"
         echo "  "(set_color green)"config_help pkg"(set_color normal)"              jump to the pkg function entry"
         echo "  "(set_color green)"config_help fish-deps"(set_color normal)"        jump to fish-deps"
         echo "  "(set_color green)"config_help abbreviations"(set_color normal)"    jump to Abbreviations section"
         echo ""
-        set_color --bold brblue
+        set_color --bold brblue; echo "NAVIGATION (ov pager)"; set_color normal
-        echo "NAVIGATION (ov pager)"
-        set_color normal
         echo "  "(set_color cyan)"Space"(set_color normal)"       next section"
         echo "  "(set_color cyan)"^"(set_color normal)"           previous section"
         echo "  "(set_color cyan)"Alt+u"(set_color normal)"       toggle section list sidebar"
@@ -71,9 +61,7 @@ function config_help --description 'Open the offline fish shell configuration ma
         echo "  "(set_color cyan)"g"(set_color normal)"           go to line number"
         echo "  "(set_color cyan)"q"(set_color normal)"           quit"
         echo ""
-        set_color --bold brblue
+        set_color --bold brblue; echo "PAGER FALLBACK CHAIN"; set_color normal
-        echo "PAGER FALLBACK CHAIN"
-        set_color normal
         echo "  "(set_color brblack)"1."(set_color normal)" ov + bat   section nav + syntax highlighting  "(set_color brblack)"(best)"(set_color normal)
         echo "  "(set_color brblack)"2."(set_color normal)" ov alone   section nav, raw Markdown"
         echo "  "(set_color brblack)"3."(set_color normal)" bat alone  syntax highlighting, use / to search"
@@ -115,7 +103,7 @@ function config_help --description 'Open the offline fish shell configuration ma
                     set found_text $kv[2]
                     break
                 end
-            end <"$idx_file"
+            end < "$idx_file"
         end
 
         # ── Normalized scan fallback ─────────────────────────────
@@ -147,7 +135,7 @@ function config_help --description 'Open the offline fish shell configuration ma
     # Prepended to the ov input stream and pinned via --header 1 so it
     # remains visible at the top of the screen at all times.
     set -l nav_hint \
-        " \033[2mNAVIGATION: [ Space=next section  ^=prev  Alt+u=sections  /=search  q=quit ]\033[0m"
+        " \033[2m[ Space=next section  ^=prev  Alt+u=sections  /=search  q=quit ]\033[0m"
 
     # ── Viewer fallback chain ────────────────────────────────────
     # When jumping to a section, slice the file from start_line so ov
@@ -172,7 +160,7 @@ function config_help --description 'Open the offline fish shell configuration ma
             end | ov $ov_args
         end
 
-        # ov alone: section navigation on raw Markdown; no code highlighting.
+    # ov alone: section navigation on raw Markdown; no code highlighting.
     else if type -q ov
         set -l ov_args \
             --header 1 \
@@ -190,7 +178,7 @@ function config_help --description 'Open the offline fish shell configuration ma
             end | ov $ov_args
         end
 
-        # bat alone: syntax highlighting with built-in paging; no line jump.
+    # bat alone: syntax highlighting with built-in paging; no line jump.
     else if type -q bat
         if test $start_line -gt 1
             set_color brblack
@@ -199,7 +187,7 @@ function config_help --description 'Open the offline fish shell configuration ma
         end
         bat --language=markdown --paging=always "$doc_file"
 
-        # Pre-compiled man page (generated by CI after merge).
+    # Pre-compiled man page (generated by CI after merge).
     else if test -f "$man_file"
         man -l "$man_file"