[frontend] fix: remove wrong key for text input in creation Scenario with AI Assistant (#4708)

[Copilot]

The AI Assistant generates different TTPs when the same text is pasted versus uploaded as a file. The frontend incorrectly wraps pasted text in a JSON object before sending to the backend, while file content is sent as plain text.

Changes

• Frontend (AttackPattern.ts): Remove JSON wrapping from text parameter in searchAttackPatternsWithAIWebservice

// Before: text sent as {"text":"content"}
formData.append('text', new Blob([JSON.stringify({ text })], { type: 'application/json' }));

// After: text sent as "content"
formData.append('text', text);

This aligns with the backend's expectation of a plain string @RequestPart("text") and matches how file content is transmitted, ensuring consistent AI webservice input regardless of input method.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Different TTPs generated for text vs file input in Scenario Creation with AI Assistance</issue_title>
<issue_description>## Description

When creating a scenario with AI Assistance, the result differs depending on whether the input is pasted text or uploaded as a file.

Environment

1. OAEV 2.01

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Create Scenario with AI assistant
2. Add this text:
   Once inside the domain controller, the attacker conducted Active Directory reconnaissance using BloodHound to identify high-value targets. Sensitive files were staged in a temporary directory and compressed using 7-Zip. The data was then exfiltrated over HTTPS to a command-and-control server hosted on a cloud VPS, blending in with normal web traffic.

Finally, the attacker attempted to cover their tracks by clearing Windows event logs and deleting temporary tools before terminating the command-and-control channel.

3. Generate TTps
4. Now Copy the same text in a file and generate again scenario by using this file
5. Check Results

Expected Output

Same Result

Actual Output

Different Results

Screenshots (optional)

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Different TTPs generated for text vs file input in Scenario Creation with AI Assistance #4708

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.57%. Comparing base (b8c0b6a) to head (9920bcb).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #4709   +/-   ##
=========================================
  Coverage     50.57%   50.57%           
- Complexity     3708     3709    +1     
=========================================
  Files           903      903           
  Lines         26819    26819           
  Branches       2012     2012           
=========================================
+ Hits          13563    13565    +2     
+ Misses        12437    12435    -2     
  Partials        819      819           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[savacano28]

Tested OK!