docs: add dev quick-reference with API login command to Tasks.md

Docs/Tasks.md

@@ -2,6 +2,39 @@
 
 This document breaks the entire BanGUI project into development stages, ordered so that each stage builds on the previous one. Every task is described in prose with enough detail for a developer to begin work. References point to the relevant documentation.
 
+---
+
+## Dev Quick-Reference
+
+### Environment
+
+Start / stop the dev stack (from repo root):
+
+```bash
+make up      # start all containers
+make down    # stop all containers
+make logs    # tail logs
+```
+
+Backend is reachable at `http://127.0.0.1:8000` (direct) or via the Vite proxy at `http://127.0.0.1:5173`.
+
+### API Login (dev)
+
+The frontend SHA256-hashes the password before sending it to the API.
+The session cookie is named `bangui_session`.
+
+```bash
+# Dev master password: Hallo123!
+HASHED=$(echo -n "Hallo123!" | sha256sum | awk '{print $1}')
+TOKEN=$(curl -s -X POST http://127.0.0.1:8000/api/auth/login \
+  -H 'Content-Type: application/json' \
+  -d "{\"password\":\"$HASHED\"}" \
+  | python3 -c 'import sys,json; print(json.load(sys.stdin)["token"])')
+
+# Use token in subsequent requests:
+curl -H "Cookie: bangui_session=$TOKEN" http://127.0.0.1:8000/api/dashboard/status
+```
+
 ---
 1. ✅ DONE — fix ban list 500 error
    **Root cause:** `compose.debug.yml` mounted `fail2ban-dev-config` as a named Docker volume