feat(course): implement PATCH support for partial course updates and improve issue templates

[GravityDarkLab]

🔧 Overview

This pull request introduces multiple enhancements, including:

• Updated and more structured GitHub issue templates (in English and German)
• Backend support for partial course updates via PATCH
• Client-side HTTP method alignment with the backend
• Comprehensive backend unit tests for the new update logic

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🗂️ Changes Breakdown

📄 Issue Templates

• Removed the old bug report template:
  🗑️ .github/ISSUE_TEMPLATE/bug_report.md

• Added two new structured templates:

  • ✅ English template: .github/ISSUE_TEMPLATE/issue_en.md
  • ✅ German template: .github/ISSUE_TEMPLATE/issue_de.md

Each includes standard sections for:

• Description
• User Story
• Acceptance Criteria
• Proposed Solution
• Related Issues / Assignees / Priority

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🛠️ Backend: Partial Course Updates

• Controller

  • Added PATCH /courses/{id} endpoint in CourseController
    → updateCoursePartial(...) method

• DTO

  • Introduced CourseUpdateRequest to support flexible, field-specific updates

• Service Layer

  • Extended CourseService and CourseServiceImpl with updateCoursePartial(...)

  • Ensures safe merging of fields like:

    • Skills
    • Categories
    • Modules (maintains order and structure)

  • Avoids overwriting unchanged fields

• 📄 Affected Files:

  • CourseController.java
  • CourseUpdateRequest.java
  • CourseService.java
  • CourseServiceImpl.java

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🧪 Backend: Unit Tests

• Added dedicated tests for the new partial update logic in:

  • CourseControllerTest.java

• Covers:

  • Updating metadata fields
  • Updating nested entities (modules, skills)
  • Empty/no-op updates
  • Error handling for non-existent course IDs

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🌐 Client-Side: HTTP Method Update

• Updated HTTP methods from PUT to PATCH for:

  • completeLesson(...)
  • completeCourse(...)

• 📄 File: client/src/services/course.service.ts

• Aligns client behavior with new backend support for partial updates

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📌 Summary

This PR brings the course update functionality in line with REST best practices by introducing PATCH support, improves flexibility with a clean DTO pattern, strengthens test coverage, and unifies backend/frontend behavior. It also introduces better structured, multilingual issue templates to streamline collaboration.

[Copilot]

Pull Request Overview

This PR implements PATCH support for partial course updates, improves GitHub issue templates, and aligns client-server HTTP methods. The main focus is adding backend functionality for updating specific course fields without requiring all mandatory data, along with comprehensive testing and updated issue templates in both English and German.

• Backend PATCH endpoint implementation with new CourseUpdateRequest DTO for partial updates
• Client-side HTTP method alignment from PUT to PATCH for lesson and course completion
• Replacement of basic bug report template with structured bilingual issue templates

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
CourseController.java	Adds new PATCH endpoint for partial course updates
CourseUpdateRequest.java	New DTO supporting optional fields for partial updates
CourseService.java & CourseServiceImpl.java	Implements partial update logic with field merging
CourseControllerTest.java & CourseServiceImplTest.java	Comprehensive test coverage for new partial update functionality
course.service.ts	Updates HTTP methods from PUT to PATCH for consistency
issue_en.md & issue_de.md	New structured issue templates in English and German
bug_report.md	Removes old basic bug report template