fix(expenses): return success response after expense creation

[krishna28004]

Description

This PR fixes the missing return statement in the create action of the Expenses Tracker.

Previously, the expense was successfully written to the database, but the action did not return a response. As a result, the frontend never received the expected success payload, preventing the success toast from appearing and the modal from closing.

This change returns the expected success response after the expense is created, allowing the existing client-side logic to complete the success flow correctly.

Related Issues

Fixes #<ISSUE_NUMBER>

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Verification

• Added the missing success return in the create action.
• Verified that the change is limited to app/routes/expenses-tracker.tsx.
• npm run typecheck passes.
• Confirmed the fix aligns with the existing toggle, update, and delete action patterns.
• No unrelated files or refactors are included.

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[github-actions]

Summary

This pull request modifies the existing codebase to add new functionality, but the exact nature of the changes is unclear without the provided diff. However, based on the CORE REVIEW PHILOSOPHY and FLIPTRACK ARCHITECTURE RULES, a thorough review will be conducted to ensure compliance and correctness.

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Files Changed

File	Change Type	Description
No files listed	N/A	No diff provided

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Review

Strengths

• No strengths can be identified without the provided diff.

Critical Issues - Must Fix Before Merge

Blocking issues: security vulnerabilities, architectural violations, race conditions, breaking changes.

• No critical issues can be identified without the provided diff.

Warnings - Should Fix

Non-blocking issues ideally addressed before merge.

• No warnings can be identified without the provided diff.

Suggestions - Nice to Have

Optional improvements.

• No suggestions can be made without the provided diff.

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Architecture Compliance

Rule	Status
Vanilla CSS Modules (no Tailwind)	N/A
Components in app/blocks/	N/A
No process.env in client code	N/A
Prisma queries filter by userId	N/A
Migration file scoped correctly	N/A
Accessibility attributes present	N/A
No in-memory state for cross-request data	N/A

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Verdict

NEEDS DISCUSSION
The verdict is NEEDS DISCUSSION because the provided diff is empty, and a thorough review cannot be conducted without it.