[Planner] Allow all conflict checks so that future mods correctly flag Prereq check failure

[yadobler]

Calculate all conflicts so that prereq and duplicate checks for future sems do not get shadowed.

Context

Fixes #4231

If a module in the future fails semesterCheck, it will not ignore prereqCheck or duplicateCheck warnings. This allows for the intended case of only showing Prerequisites / Duplicates warnings regardless of whether Module is currently offered in that semester.

Correct Future Sem?	Prereqs fail?	Duplicates?	result
No	No	No	✅ Green Light
No	Yes	No	⚠️ Prereq Error
No	Yes	Yes	⚠️ Prereq Error
No	No	Yes	⚠️ Duplicate Error
Yes	No	No	✅ Green Light
Yes	Yes	No	⚠️ Prereq Error
Yes	Yes	Yes	⚠️ Prereq Error
Yes	No	Yes	⚠️ Duplicate Error

Implementation

• ModuleInfo now takes an array of Conflict instead of just a single one
• All conflict checks are done, instead of terminating at the first non-null conflict
• The displayedConflict will either be the first conflict in the Conflicts array if current year, or else either Prerequisite or Duplicate conflict for non-current years

Assumptions:

• conflict-checking functions are added into the conflictChecks array in sequence of priority
• prerequisites takes precedence over duplicates
• future semesters do not include Semester conflicts due to possible changes in future timetable

Other Information

• Not sure if I need to edit any test files add more tests to check this behaviour
• please ignore banana cursor in screenshot

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Comments	Updated (UTC)
nusmods-export	Ready	Preview	Comment	Sep 13, 2025 5:29am

[vercel]

@yadobler is attempting to deploy a commit to the modsbot's projects Team on Vercel.

A member of the Team first needs to authorize it.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52.96%. Comparing base (988c6fd) to head (4505a45).
⚠️ Report is 142 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4232      +/-   ##
==========================================
- Coverage   54.52%   52.96%   -1.56%     
==========================================
  Files         274      289      +15     
  Lines        6076     6687     +611     
  Branches     1455     1634     +179     
==========================================
+ Hits         3313     3542     +229     
- Misses       2763     3145     +382     

☔ 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.