refactor: use __fish_palette in small utility functions (1/2)

37 duplicated declarations replaced by 8 calls. Output strings untouched;
byte-identical across 29 harness cases.

functions/bkg.fish

@@ -25,10 +25,7 @@
 function bkg --description 'Execute bkg'
     # Check if a command was provided as an argument.
     if test -z "$argv[1]"
-        set -l c_head (set_color --bold cyan)
-        set -l c_cmd (set_color --bold)
-        set -l c_arg (set_color cyan)
-        set -l c_reset (set_color normal)
+        __fish_palette
         echo "$c_head""Usage:$c_reset $c_cmd""bkg$c_reset $c_arg""<command> [arguments...]$c_reset"
         return 1
     end

functions/detach.fish

@@ -25,11 +25,7 @@
 # EXAMPLE
 #   detach rsync -a ./data remote:/backup/
 function detach --description 'Execute detach'
-    set -l c_head (set_color --bold cyan)
-    set -l c_cmd (set_color --bold)
-    set -l c_flag (set_color yellow)
-    set -l c_arg (set_color cyan)
-    set -l c_reset (set_color normal)
+    __fish_palette
 
     set -l show_help 0
     set -l args

functions/dng2avif.fish

@@ -38,11 +38,7 @@ function dng2avif --description 'Convert DNG raw to 10-bit HDR AVIF'
 
     # Help Screen
     if set -q _flag_help; or test (count $argv) -eq 0 -a -z "$_flag_input"
-        set -l c_head (set_color --bold cyan)
-        set -l c_cmd (set_color --bold)
-        set -l c_flag (set_color yellow)
-        set -l c_dim (set_color brblack)
-        set -l c_reset (set_color normal)
+        __fish_palette
         echo "$c_head""Usage:$c_reset $c_cmd""dng2avif$c_reset $c_flag""[options]$c_reset $c_dim""[input.dng]$c_reset"
         echo ""
         echo "$c_head""Options:$c_reset"

functions/edit.fish

@@ -45,12 +45,7 @@
 #   edit --editor=code --clipboard
 #   edit --text="hello world"
 function edit --description 'Open files in a terminal or GUI editor with fallbacks'
-    set -l c_head (set_color --bold cyan)
-    set -l c_cmd (set_color --bold)
-    set -l c_flag (set_color yellow)
-    set -l c_err (set_color red)
-    set -l c_dim (set_color brblack)
-    set -l c_reset (set_color normal)
+    __fish_palette
 
     # Opinionated guard (C1): fall back to the legacy bare-editor behavior.
     if not __fish_config_op_enabled (status current-function)

functions/hist.fish

@@ -19,8 +19,7 @@
 function hist --description 'Search fish history and put it in the prompt'
     # Opinionated guard (C4): integrations disabled
     if not __fish_config_op_enabled (status current-function)
-        set -l c_err (set_color red)
-        set -l c_reset (set_color normal)
+        __fish_palette
         echo "$c_err"'hist: disabled by __fish_config_op_integrations'"$c_reset" >&2
         return 1
     end

functions/open-url.fish

@@ -41,11 +41,7 @@
 # NOTES
 #   Typo abbreviation: url-open (expands to open-url on space/enter).
 function open-url --description 'Open a URL in the best available web browser'
-    set -l c_head (set_color --bold cyan)
-    set -l c_cmd (set_color --bold)
-    set -l c_flag (set_color yellow)
-    set -l c_arg (set_color cyan)
-    set -l c_reset (set_color normal)
+    __fish_palette
 
     argparse h/help s/silent v/verbose -- $argv
     or return 1

functions/p.fish

@@ -28,11 +28,7 @@
 function p --description 'Put from clipboard'
     # Check for help flag
     if contains -- -h $argv; or contains -- --help $argv
-        set -l c_head (set_color --bold cyan)
-        set -l c_cmd (set_color --bold)
-        set -l c_flag (set_color yellow)
-        set -l c_dim (set_color brblack)
-        set -l c_reset (set_color normal)
+        __fish_palette
         echo "$c_head""Usage:$c_reset $c_cmd""p$c_reset $c_flag""[OPTIONS]$c_reset"
         echo ""
         echo "  Pastes content from the system clipboard to stdout."

functions/play-media.fish

@@ -36,11 +36,7 @@
 #   play-media
 #   play-media --player mpv
 function play-media --description 'Pick audio/video files with fzf and play them'
-    set -l c_head (set_color --bold cyan)
-    set -l c_cmd (set_color --bold)
-    set -l c_flag (set_color yellow)
-    set -l c_dim (set_color brblack)
-    set -l c_reset (set_color normal)
+    __fish_palette
 
     argparse h/help p/player= -- $argv
     or return 1