fix: update link generation for alert titles in content.htm

[fukusuket]

Closed #280
I expect this issue to be resolved with this fix. Could you please confirm?🙏
When verifying the fix, we need to run cp -r template ./takajo/ in advance.

Integraion-Test

• https://github.com/Yamato-Security/takajo/actions/runs/20325439125

[Copilot]

Pull request overview

This pull request fixes link generation for alert titles in the detection rule list by constructing the correct URL with query parameters instead of using raw file paths. The change replaces the direct use of rule[1] (which contains the file path from the database) with a properly formatted URL pattern that matches the API endpoint expectations.

Key Changes

• Changed from using rule[1] (file path) to constructing a URL with "rule/content?alert_title=" + rule[0] where rule[0] is the alert title
• This aligns the link construction with the expected API endpoint pattern defined in src/takajopkg/web/controllers/rules.nim

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[YamatoSecurity]

@fukusuket Thanks! Can you explain more about how I need to run cp -r template ./takajo/ in advance?

I have a templates folder inside of my takajo directory already.
I am still getting this format of link: http://localhost:8823/hayabusa/rules/sigma/sysmon/pipe_created/pipe_created_hktl_cobaltstrike.yml

[fukusuket]

@YamatoSecurity
This fix meant that, since it was a change to templates/static/content.htm, it was necessary to copy templates/static/content.htm! (Copying the takajo binary would not apply this fix.)

[YamatoSecurity]

@fukusuket I see, LGTM! Thanks so much!!