Created Reset Admin Password (Offline Tool) (markdown)

Reset-Admin-Password-(Offline-Tool).md

@@ -0,0 +1,117 @@
+This guide explains how to reset the **admin login password** for Bichon.
+
+⚠️ **This recovery tool is NOT included in the Docker image.**
+It is distributed **together with `bichonctl` inside the official release archive**,
+and must be executed manually on the host system.
+
+You can download it from the **GitHub Releases** page.
+
+---
+
+## Important Notice
+
+* This tool **does NOT stop bichon-service automatically**
+* You must stop the service manually before running it
+* The database cannot be opened while the service is running
+
+```bash
+docker stop bichon
+```
+
+or:
+
+```bash
+docker compose down
+```
+
+---
+
+## Requirements
+
+* Access to the host machine
+* Bichon release package (same archive as `bichonctl`)
+* Original database encryption password
+
+---
+
+## Locate `bichon_root_dir`
+
+This is the directory mounted into Docker.
+The directory must contain:
+
+```
+meta.db
+```
+
+---
+
+## Run the Tool
+
+Ensure that `bichon-admin` is on the **same machine** where `meta.db` resides, so it can access the database file.
+
+Extract the release archive:
+
+```bash
+tar -xzf bichon-<version>-linux-amd64.tar.gz
+```
+
+Run the tool:
+
+```bash
+./bichon-admin
+```
+
+The tool will prompt you for the absolute path to `bichon_root_dir` (the directory containing `meta.db`).
+It must be able to read and write `meta.db` for the password reset to succeed.
+
+
+---
+
+## Reset Procedure
+
+1. Select **Reset Admin Password**
+2. Enter absolute path of `bichon_root_dir`
+3. Provide the database encryption key
+   (same value used by the server)
+4. Confirm admin account information
+5. Enter the new admin password
+6. Confirm database update
+
+On success:
+
+```
+Success! Admin password has been updated.
+```
+
+---
+
+## Restart Service
+
+```bash
+docker start bichon
+```
+
+or:
+
+```bash
+docker compose up -d
+```
+
+Log in using the new admin password.
+
+---
+
+## Common Errors
+
+### DatabaseAlreadyOpen
+
+**Cause:** bichon-service is still running
+**Fix:** stop the service before executing the tool.
+
+---
+
+### Decryption failed
+
+**Cause:** incorrect encryption password
+**Fix:** use the same encryption key configured during initialization.
+