fix(config): split tricks.fish overrides-tricks into manpager/bang sites

overrides-tricks conflated two distinct C3 concerns under one shared site
(overrides/environment), so __fish_config_op_overrides_key_bindings off
left tricks.fish's bang-bang bindings active while abbr.fish/puffer.fish/
config.fish's equivalent sites correctly disabled -- a half-dismantled
bang-bang system per docs/manual's own atomic-gating claim. Split into
tricks-manpager (overrides/environment, matches PAGER/EDITOR/CDPATH) and
tricks-bang (overrides/key-bindings, matches abbr.fish/puffer.fish/
config.fish's bang-related sites, per
docs/manual/08-components-reference/03-c3-key-and-environment-overrides.md).

Also fixes stale prose in config.fish's top-of-file comment: the guard
signature is now <identity> [<site>], not <category>.

conf.d/__fish_config_op_registry.fish

@@ -62,7 +62,8 @@ set -g __fish_config_op_registry_keys \
     tmux-logging: \
     top: \
     tricks:aliases-tricks \
-    tricks:overrides-tricks \
+    tricks:tricks-bang \
+    tricks:tricks-manpager \
     upgrade: \
     wakatime:wakatime-autoexec \
     wakatime:wakatime-hook \
@@ -127,6 +128,7 @@ set -g __fish_config_op_registry_values \
     "logging/multiplexer-capture" \
     "aliases/monitor" \
     "aliases/filesystem" \
+    "overrides/key-bindings" \
     "overrides/environment" \
     "integrations/pkg-upgrade" \
     "autoexec/telemetry" \

conf.d/tricks.fish

@@ -9,7 +9,8 @@
 
 # COMPONENT
 #   site aliases-tricks: aliases/filesystem
-#   site overrides-tricks: overrides/environment
+#   site tricks-manpager: overrides/environment
+#   site tricks-bang: overrides/key-bindings
 
 ## Environment setup
 # Apply .profile: use this to put fish compatible .profile stuff in
@@ -28,7 +29,7 @@ end
 
 # Format man pages using bat (only if bat is installed)
 # Overriding $MANPAGER is opinionated (C3 overrides)
-if type -q bat; and __fish_config_op_enabled (status basename) overrides-tricks
+if type -q bat; and __fish_config_op_enabled (status basename) tricks-manpager
     set -gx MANROFFOPT -c
     set -gx MANPAGER "sh -c 'col -bx | bat -l man -p'"
 end
@@ -41,7 +42,7 @@ set -gx __done_notification_urgency_level low
 # Functions needed for !! and !$ https://github.com/oh-my-fish/plugin-bang-bang
 # The bang-bang system is opinionated (C3 overrides) and is gated atomically
 # here, in conf.d/abbr.fish, conf.d/puffer.fish, and functions/expand_*.fish.
-if __fish_config_op_enabled (status basename) overrides-tricks
+if __fish_config_op_enabled (status basename) tricks-bang
     function __history_previous_command
         switch (commandline -t)
             case "!"

config.fish

@@ -7,7 +7,7 @@
 
 #   ───────────────────── Opinionated component guards ─────────────────────
 # Opinionated components (AGENTS.md Task #3) are wrapped in
-# __fish_config_op_enabled <category> guards throughout this file and conf.d/.
+# __fish_config_op_enabled <identity> [<site>] guards throughout this file and conf.d/.
 # The helper always evaluates the master switch __fish_config_opinionated
 # first (falsy disables everything), then the per-category opt-out variable:
 #   __fish_config_op_aliases       C1 — command shadows / flag injection