fix: hash actual token file contents instead of hardcoded defaults

The previous code always hashed the literal strings 'usertoken' and
'admintoken' regardless of whether the user had changed the token
files. Now reads the actual file content for hashing.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: butler54

scripts/gen-secrets.sh

@@ -46,13 +46,13 @@ if [ ! -f "${PCCS_USER_TOKEN_FILE}" ]; then
 	echo "Creating PCCS user token"
 	echo "usertoken" > "${PCCS_USER_TOKEN_FILE}"
 fi
-echo -n "usertoken" | sha512sum | tr -d '[:space:]-' > "${COCO_SECRETS_DIR}/pccs_user_token_hash"
+tr -d '\n' < "${PCCS_USER_TOKEN_FILE}" | sha512sum | tr -d '[:space:]-' > "${COCO_SECRETS_DIR}/pccs_user_token_hash"
 
 if [ ! -f "${PCCS_ADMIN_TOKEN_FILE}" ]; then
 	echo "Creating PCCS admin token"
 	echo "admintoken" > "${PCCS_ADMIN_TOKEN_FILE}"
 fi
-echo -n "admintoken" | sha512sum | tr -d '[:space:]-' > "${COCO_SECRETS_DIR}/pccs_admin_token_hash"
+tr -d '\n' < "${PCCS_ADMIN_TOKEN_FILE}" | sha512sum | tr -d '[:space:]-' > "${COCO_SECRETS_DIR}/pccs_admin_token_hash"
 
 ## Copy a sample values file if this stuff doesn't exist