fix: restore docker context behind starship+C3 guard, use long date format in right prompt

functions/fish_right_prompt.fish

@@ -5,10 +5,11 @@
 #   fish_right_prompt
 #
 # DESCRIPTION
-#   Renders the right-side prompt. Shows a red ✘ with the exit code when the
-#   last command failed (hidden on success), followed by the current time in
-#   Catppuccin Overlay0 (dim). Rendered regardless of C3 state so it pairs
-#   correctly with both the starship and the Catppuccin fallback left prompt.
+#   Renders the right-side prompt. Always shows a dim timestamp. When the last
+#   command failed, prefixes it with a red ✘ and the exit code. When starship
+#   is installed and C3 overrides are enabled, also shows the active Docker
+#   context (if non-default) — that block is paired with the starship prompt
+#   which already guards on both conditions.
 #
 # RETURNS
 #   0  Always
@@ -25,8 +26,18 @@ function fish_right_prompt
         set_color normal
     end
 
+    # Docker context — only relevant alongside the starship prompt
+    if type -q starship; and __fish_config_op_enabled __fish_config_op_overrides
+        set -l docker_ctx (docker context show 2>/dev/null)
+        if test -n "$docker_ctx"; and test "$docker_ctx" != default
+            set_color blue
+            echo -n "󰡨 $docker_ctx "
+            set_color normal
+        end
+    end
+
     # Timestamp — Catppuccin Overlay0 (dim)
     set_color '#6c7086'
-    date +%X
+    date "+%a %b %d %H:%M:%S %Y"
     set_color normal
 end