fix: enhance .env loading to safely parse key-value pairs and handle special characters

lib/common.sh

@@ -80,10 +80,31 @@ load_env() {
     log_error "Copy .env.example to .env and populate values."
     return 1
   fi
-  set -a  # auto-export all vars defined below
-  # shellcheck source=/dev/null
-  source "$env_file"
-  set +a  # stop auto-exporting
+  # Parse KEY=VALUE lines safely without executing them as bash.
+  # Using 'source' on .env is dangerous: unquoted values with spaces
+  # (e.g. GITEA_INSTANCE_NAME=PID Git) cause the second word to be
+  # executed as a command. This parser handles comments, blank lines,
+  # and values with spaces, quotes, and special characters.
+  local line key value
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    # Skip blank lines and comments
+    [[ -z "$line" || "$line" == \#* ]] && continue
+    # Must contain = to be a valid assignment
+    [[ "$line" == *=* ]] || continue
+    key="${line%%=*}"
+    value="${line#*=}"
+    # Strip inline comments: remove everything from '# ' onward (hash + space).
+    # The space after # distinguishes comments from # in URLs/passwords/tokens.
+    # Handles both 'value # comment' and 'value# comment' formats.
+    value="${value%%# *}"
+    # Strip surrounding quotes (single or double) if present
+    if [[ "$value" =~ ^\"(.*)\"$ ]] || [[ "$value" =~ ^\'(.*)\'$ ]]; then
+      value="${BASH_REMATCH[1]}"
+    fi
+    # Strip trailing whitespace
+    value="${value%"${value##*[! ]}"}"
+    export "$key=$value"
+  done < "$env_file"
 }
 
 save_env_var() {
@@ -430,7 +451,7 @@ ssh_exec() {
   # ConnectTimeout: fail fast if host is unreachable (don't hang for 60s)
   # StrictHostKeyChecking=accept-new: auto-accept new hosts but reject changed keys
   # BatchMode=yes: never prompt for password (fail if key auth doesn't work)
-  # ${key:+-i "$key"}: pass -i only when SSH_KEY is set (otherwise use ssh-agent default)
+  # ${key:+-i "$key"}: pass -i only when SSH_KEY is set (otherwise SSH uses default keys from ~/.ssh/id_*)
   ssh ${key:+-i "$key"} \
       -o ConnectTimeout=10 \
       -o StrictHostKeyChecking=accept-new \