shell: fish functions -> ~/.local/bin executables + bash/zsh ports; manage ~/.agents

- 16 cross-shell utilities converted to sh/bash chezmoi executables:
  ai c2p cp-appid extract_agents fab gdc gh-sonr-org-migrate ghg-clone
  ghn gho git-summary launch_omp_livediff_overlay lc-elir mdcp mdp pj
  (ghg-clone not named ghg: unrelated cargo binary owns that name)
- cwd/history helpers stay per-shell: yy c cd clip-last + ghg/ghn/gho
  cd-wrappers in bash/functions/ and zsh/functions/, loaded by rc files
- fish keeps only shell-state functions; converted ones now hit PATH
- cp-appid ignore gating moved to .local/bin path
- dot_agents/skills: 82 skills materialized from dotstate storage so
  dot_claude skill symlinks resolve on fresh bootstrap; dotstate
  profile/symlinks.json released .agents/skills .bashrc .zshrc

dot_bashrc

@@ -6,12 +6,22 @@
 [[ $- != *i* ]] && return
 
 # PATH extras / tool envs (machine-optional, guarded)
+case ":$PATH:" in *":$HOME/.local/bin:"*) ;; *) PATH="$HOME/.local/bin:$PATH" ;; esac
 [ -f "$HOME/.cargo/env" ] && . "$HOME/.cargo/env"
 [ -d "$HOME/.maestro/bin" ] && PATH="$PATH:$HOME/.maestro/bin"
 
 # Shared aliases (same set as fish/zsh; source of truth: .chezmoidata/aliases.yaml)
 [ -f "$HOME/.config/shell/aliases.sh" ] && . "$HOME/.config/shell/aliases.sh"
 
+# Shell functions — one file per function, bash ports of the fish ones
+# (cwd/history-touching helpers; standalone tools live in ~/.local/bin)
+if [ -d "$HOME/.config/bash/functions" ]; then
+    for _f in "$HOME/.config/bash/functions"/*.bash; do
+        [ -r "$_f" ] && . "$_f"
+    done
+    unset _f
+fi
+
 # Flyline — enhanced Bash line editing (machine-optional, guarded)
 [ -f "$HOME/.local/lib/libflyline.so" ] && enable -f "$HOME/.local/lib/libflyline.so" flyline