fix some bugs

AGENTS.md

@@ -0,0 +1,66 @@
+# AGENTS.md — blog (六桂流芳的com)
+
+## Tech stack
+
+- Python 3.12.7, Django 5.1, SQLite (dev) / PostgreSQL (prod via `psycopg2-binary`)
+- `zh-Hans` locale, `Asia/Shanghai` timezone
+
+## Key commands
+
+Run from `myblog/`:
+
+```bash
+python manage.py runserver                  # dev server
+python manage.py makemigrations              # after model changes
+python manage.py migrate                     # apply migrations
+python manage.py createsuperuser             # admin login
+python manage.py collectstatic               # prod: gather static files to staticfiles/
+```
+
+## Package management
+
+```bash
+pip install -r requirements.txt              # sync deps (no lockfile)
+```
+
+`uv` (v0.8.3) is in requirements.txt but not the primary workflow.
+
+## Project layout
+
+```
+myblog/
+├── blog/                 # main app (models, views, templates, admin)
+│   └── static/blog/      # shared CSS (single style.css)
+├── myblog/               # Django project settings/settings.py
+├── manage.py
+├── db.sqlite3            # dev DB (gitignored)
+└── media/                # user uploads (gitignored)
+```
+
+## Key models
+
+- `Post` — `title`, `content` (MDEditor), `category` (FK), `status` (draft/published), `publish_date`
+- `Category` — `name`, `description`
+- `SiteSettings` — singleton: `summary_length`, contact fields
+
+Admin at `/admin/` with MDEditor on Post content field.
+
+## Local overrides
+
+Create `myblog/myblog/local_settings.py` to override any setting. Imported at the bottom of `settings.py`.
+
+## Git workflow
+
+```
+feature/* or bugfix/* → develop → main
+```
+
+Remote: `ssh://git@git.yuangyaa.com:222/yuangyaa/blog.git`
+
+## What's NOT configured
+
+- **No tests** (tests.py is blank)
+- **No linting, formatting, or type checking**
+- **No CI/CD**
+- **No pre-commit hooks**
+- **No Docker**