fix(mise): correct PATH precedence, error handling, and shell detection

- Append non-mise PATH entries so mise shims keep highest precedence
- Remove legacy cargo bin from initial PATH bootstrap
- Detect current shell for mise activate instead of hardcoding bash
- Rename AWS_SESSION_TOKEN to AWS_SESSION_TOKEN_FILE (was a file path)
- Add exit-on-failure checks to dfm mise install block
- Fix reset_nvim to call mise instead of removed npm installer
- Forward all args in dfm mise-cleanup
- Auto-detect DOTFILES in cleanup script when not pre-exported
- Report brew uninstall failures instead of masking with || true
- Fix p10k segment name from MISE to ASDF
- Replace npm with yarn in CLAUDE.md Bash whitelist

config/zsh/p10k.zsh

@@ -121,8 +121,8 @@
   # Don't show context unless root or in SSH.
   # typeset -g POWERLEVEL9K_CONTEXT_{DEFAULT,SUDO}_CONTENT_EXPANSION=
 
-  # aws, go and mise versions colors.
-  typeset -g POWERLEVEL9K_{AWS,GO,MISE}_FOREGROUND=$grey
+  # aws, go and asdf versions colors.
+  typeset -g POWERLEVEL9K_{AWS,GO,ASDF}_FOREGROUND=$grey
 
   # Show previous command duration only if it's >= 86400s = 24h.
   typeset -g POWERLEVEL9K_COMMAND_EXECUTION_TIME_THRESHOLD=86400