Bug: minijinja import too early on FlashPlugin

[euri10]

Description

error is:

❯ python main.py
Traceback (most recent call last):
  File "/home/lotso/.cache/pypoetry/virtualenvs/tt-n-gxmD69-py3.12/lib/python3.12/site-packages/litestar/contrib/minijinja.py", line 21, in <module>
    from minijinja import Environment  # type:ignore[import-untyped]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ModuleNotFoundError: No module named 'minijinja'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/lotso/toto/tt/main.py", line 2, in <module>
    from litestar.plugins.flash import FlashPlugin
  File "/home/lotso/.cache/pypoetry/virtualenvs/tt-n-gxmD69-py3.12/lib/python3.12/site-packages/litestar/plugins/flash.py", line 8, in <module>
    from litestar.contrib.minijinja import MiniJinjaTemplateEngine
  File "/home/lotso/.cache/pypoetry/virtualenvs/tt-n-gxmD69-py3.12/lib/python3.12/site-packages/litestar/contrib/minijinja.py", line 24, in <module>
    raise MissingDependencyException("minijinja") from e
litestar.exceptions.base_exceptions.MissingDependencyException: Package 'minijinja' is not installed but required. You can install it by running 'pip install litestar[minijinja]' to install litestar with the required extra or 'pip install minijinja' to install the package separately

the imports for minijinja seems to be too early in the game,

URL to code causing the issue

No response

MCVE

from litestar import Litestar
from litestar.plugins.flash import FlashPlugin


app = Litestar(route_handlers=[], plugins=[FlashPlugin])

Steps to reproduce

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Screenshots

"![SCREENSHOT_DESCRIPTION](SCREENSHOT_LINK.png)"

Logs

No response

Litestar Version

2.8.2

Platform

• Linux
• Mac
• Windows
• Other (Please specify in the description above)

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[github-actions]

This issue has been closed in #3418. The change will be included in the upcoming patch release.

[github-actions]

A fix for this issue has been released in v2.9.0