Fix .env writer: quote values so shell metacharacters don't break source

deploy.sh sources .env directly as bash (`set -a; source .env`), but
setup.sh wrote raw unquoted values. The default SMTP_FROM ("ANOUMA
<no-reply@...>") contains `<`/`>`, which bash parses as redirections,
failing with "syntax error near unexpected token `newline'" on every
deploy. Both scripts' env_set now write double-quoted values with
backslashes/quotes escaped — valid for both `source` and Docker
Compose's env_file parsing (which strips matching quotes).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

deploy.sh

@@ -61,13 +61,19 @@ trap 'rm -f "$LOCK_FILE"' EXIT
 # .env helpers — same idempotent read/write approach as setup.sh.
 # ---------------------------------------------------------------------------
 env_get() { grep -E "^$1=" .env 2>/dev/null | tail -n1 | cut -d'=' -f2- || true; }
+# Quoted the same way as setup.sh's env_set — this file is `source`d as a
+# bash script below, so an unquoted value with shell metacharacters would
+# break parsing.
 env_set() {
-  local key="$1" value="$2"
+  local key="$1" value="$2" escaped quoted
+  escaped="${value//\\/\\\\}"
+  escaped="${escaped//\"/\\\"}"
+  quoted="\"${escaped}\""
   if grep -qE "^$key=" .env; then
     local tmp; tmp="$(mktemp)"
-    awk -v k="$key" -v v="$value" 'BEGIN{FS=OFS="="} $1==k{$0=k "=" v} {print}' .env > "$tmp" && mv "$tmp" .env
+    awk -v k="$key" -v v="$quoted" 'BEGIN{FS=OFS="="} $1==k{$0=k "=" v} {print}' .env > "$tmp" && mv "$tmp" .env
   else
-    printf '%s=%s\n' "$key" "$value" >> .env
+    printf '%s=%s\n' "$key" "$quoted" >> .env
   fi
 }
 

setup.sh

@@ -263,13 +263,23 @@ env_get() { $SUDO grep -E "^$1=" "$ENV_FILE" 2>/dev/null | tail -n1 | cut -d'='
 # passing, never re-interpolated into a nested shell string) so arbitrary
 # characters in $value — quotes, backslashes, anything a typed SMTP/registry
 # password might contain — can never break quoting or be misinterpreted.
+#
+# The value is written double-quoted, with backslashes and double quotes
+# escaped: deploy.sh later `source`s this file as a bash script, so an
+# unquoted value containing shell metacharacters (e.g. the default
+# SMTP_FROM="ANOUMA <no-reply@...>", whose `<`/`>` are redirections) breaks
+# with "syntax error near unexpected token `newline'". Quoting also works
+# fine for Docker Compose's own env_file parsing, which strips matching
+# surrounding quotes.
 env_set() {
-  local key="$1" value="$2" tmp
+  local key="$1" value="$2" tmp escaped
+  escaped="${value//\\/\\\\}"
+  escaped="${escaped//\"/\\\"}"
   tmp="$(mktemp)"
   if $SUDO test -f "$ENV_FILE"; then
     $SUDO grep -vE "^${key}=" "$ENV_FILE" > "$tmp" 2>/dev/null || true
   fi
-  printf '%s=%s\n' "$key" "$value" >> "$tmp"
+  printf '%s="%s"\n' "$key" "$escaped" >> "$tmp"
   $SUDO cp "$tmp" "$ENV_FILE"
   rm -f "$tmp"
 }