fix(install): make setup failures explicit and atomic

Installer pipelines masked dependency and download failures, causing
false success messages and unsafe config replacement.

Atomic updates and current upstream installers keep failures visible.

.zshrc

@@ -157,7 +157,7 @@ SAVEHIST=50000      #save upto 50,000 lines in history. oh-my-zsh default is 10,
 #setopt hist_ignore_all_dups     # dont record duplicated entries in history during a single session
 
 alias myip="wget -qO- https://wtfismyip.com/text"	# quickly show external ip address
-alias l="ls --hyperlink=auto -lAhrtF"    # show all except . .. , sort by recent, / at the end of folders, clickable
+alias l="eza --hyperlink -lA --sort=modified --reverse --classify"    # show all except . .. , sort by recent, / at the end of folders, clickable
 alias e="exit"
 alias ip="ip --color=auto"
 ## EZA - the better ls command
@@ -184,7 +184,8 @@ cheat() {
 # TRAPALRM() { if command -v cmatrix &> /dev/null; then cmatrix -sb; fi }
 
 speedtest() {
-    curl -s https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py | python3 -
+    setopt localoptions pipefail
+    curl -fsSL https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py | python3 -
 }
 
 dadjoke() {
@@ -195,9 +196,9 @@ dadjoke() {
 ipgeo() {
     # Specify ip or your ip will be used
     if [ "$1" ]; then
-        curl "http://api.db-ip.com/v2/free/$1"
+        curl "https://api.db-ip.com/v2/free/$1"
     else
-        curl "http://api.db-ip.com/v2/free/$(myip)"
+        curl "https://api.db-ip.com/v2/free/$(myip)"
     fi
 }
 
@@ -217,7 +218,7 @@ for file in "$ZSH_CONFIGS_DIR"/*(DN); do
 done
 
 # Now source oh-my-zsh.sh so that any plugins added in ~/.config/zshrc/* files also get loaded
-source $ZSH/oh-my-zsh.sh
+source "$ZSH/oh-my-zsh.sh"
 
 # Configs that can only work after "source $ZSH/oh-my-zsh.sh", such as Aliases that depend oh-my-zsh plugins
 
@@ -226,6 +227,6 @@ source $ZSH/oh-my-zsh.sh
 export FZF_DEFAULT_OPS="--extended"
 
 # Initialize zoxide (smarter cd command)
-eval "$(zoxide init zsh)"
+command -v zoxide &> /dev/null && eval "$(zoxide init zsh)"
 
 alias k="k -h"       # show human readable file sizes, in kb, mb etc