feat(auth): enhance login flow with notifications and path normalization

- add success notification on successful login
- show error notification with detailed message on login failure
- normalize API paths to prevent double slashes and trailing slashes
- redirect to login page only if not on login request or page

CLI.md

@@ -150,6 +150,17 @@ All commands support the following global flags:
 - `--config <path>`: Path to configuration file
 - `--server <url>`: Server URL (overrides config file)
 
+### Password Hash Utility
+
+Generate bcrypt password hashes for user creation and password updates:
+
+```bash
+./bin/whatshook-cli password-hash
+./bin/whatshook-cli password-hash "my-secret-password"
+./bin/whatshook-cli password-hash --password "my-secret-password" --cost 12
+echo -n "my-secret-password" | ./bin/whatshook-cli password-hash --stdin
+```
+
 ### Health Check
 
 Check if the server is running and healthy: