feat(guards): add opinionated component guards to config.fish and conf.d

Adds __fish_config_op_enabled helper (master __fish_config_opinionated
evaluated first via __fish_variable_check, then the category variable)
and gates C1-C4 components: CachyOS surgical override, PAGER/MANPAGER,
CDPATH, Vi mode, exit override, bang-bang bindings, history/cp/mv/wget/
grep aliases, cd->z alias, Fisher bootstrap and theme apply, paru/yay
wrapper generation, WakaTime hook, custom key chords, puffer, autopair,
starship prompt, Catppuccin colors, FZF_DEFAULT_OPTS, done notifications,
and Kitty/WezTerm window-management abbreviations.

conf.d/first_run.fish

@@ -29,6 +29,14 @@ echo "  Run 'help config' for offline documentation."
 echo "  Run 'fish-deps'   to check and install dependencies."
 echo ""
 
+#   ─────────────────────── Opinionated auto-exec guard ────────────────────
+# Startup side-effects below (Fisher curl, fisher update, theme apply) are
+# opinionated (C2 auto-execution). The first-run state variable is already
+# set above either way, so disabling auto-exec never re-triggers this file.
+if not __fish_config_op_enabled __fish_config_op_autoexec
+    return
+end
+
 #   ──────────────────────────── Bootstrap Fisher ──────────────────────────
 if not type -q fisher
     echo "  [first-run] Installing Fisher plugin manager..."