fix(shell): restore always-on PATH after macOS path_helper

path_helper runs after ~/.zshenv in login shells and puts Homebrew ahead of
fnm, pyenv, and ~/.local/bin. Re-source ~/.zshenv from ~/.zprofile and make
prepends idempotent so login and zsh -c resolve the same binaries.

install.sh

@@ -357,7 +357,8 @@ echo -e "Downloading easyzsh shell stubs\n"
 for rel in \
     deploy.sh \
     .zshenv \
-    .zshrc
+    .zshrc \
+    .zprofile
 do
     download_easyzsh_file "$rel"
 done