Implement a search bar on the Expenses List screen

[pedrazamiguez]

Problem / Motivation

As a group's expenses grow, users find it difficult to locate specific expenses based on what they remember about them, such as the title or notes.

Proposed Solution

• Add a search bar at the top of the Expenses List screen.
• Filter the expenses dynamically by title or notes based on the search query.
• Use debouncing on the search input to avoid excessive recomposition/filtering.

Acceptance Criteria

• Search bar is present and functional on the Expenses List screen.
• Expenses list updates dynamically based on matching title or notes.
• All existing tests pass; new tests added where behaviour changes.
• make fast-check passes during iterative development (~15–30s).
• make check > build.log 2>&1 && echo "Check passed successfully" || (tail -n 100 build.log && exit 1) passes with 0 failures before merging.
• No new detekt findings introduced.

Out of Scope

• Searching by amount or other numeric fields.

Related Issues / PRs

• Child of Track final stages of MVP development and release readiness #1401

[github-actions]

🌱 Branch created

feature/SPLTRP-1500

This branch has been automatically created based on develop.

🚀 Getting started

Fetch and switch to this branch with the latest changes from develop:

git fetch origin
git checkout feature/SPLTRP-1500
git pull origin develop

📌 When creating your PR

• Base branch: develop
• Title:

  [SPLTRP-1500]: Implement a search bar on the Expenses List screen
  

• Description: Closes #1500

[pedrazamiguez]

This has to be a search as you type functionality, updating the filtered list in real time.