test: cover backup restore startup

README.md

@@ -435,6 +435,16 @@ For a full list of commands see [docs/advanced_cli.md](docs/advanced_cli.md). Th
    ```
    *(or `python src/main.py` when running directly from the repository)*
 
+   To restore a previously backed up index at launch, provide the backup path
+   and fingerprint:
+
+   ```bash
+   seedpass --restore-backup /path/to/backup.json.enc --fingerprint <fp>
+   ```
+
+   Without the flag, the startup prompt offers a **Restore from backup** option
+   before the vault is initialized.
+
 2. **Follow the Prompts:**
 
    - **Seed Profile Selection:** If you have existing seed profiles, you'll be prompted to select one or add a new one.
@@ -620,6 +630,10 @@ initial setup. You must provide both your 12‑word master seed and the master
 password that encrypted the vault; without the correct password the retrieved
 data cannot be decrypted.
 
+Alternatively, a local backup file can be loaded at startup. Launch the
+application with `--restore-backup <file> --fingerprint <fp>` or choose the
+**Restore from backup** option presented before the vault initializes.
+
 1. Start SeedPass and choose option **4** when prompted to set up a seed.
 2. Paste your BIP‑85 seed phrase when asked.
 3. Enter the master password associated with that seed.