fix(dashboard): resolve data processing and display issues

Author: PriyadharshiniSakthivel367

.github/ISSUE_TEMPLATES/bug_report.md

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+---
+name: Bug Report
+about: Report a bug to help us improve
+---
+
+**Describe the Bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
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+**Expected Behavior**
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.github/ISSUE_TEMPLATES/feature_request.md

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+---
+name: Feature Request
+about: Suggest a new idea or improvement
+---
+
+**Describe the Feature Request**
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.github/ISSUE_TEMPLATES/pull_request.md

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+---
+name: Pull Request
+about: Submit changes for review
+---
+
+**Description**
+Provide a brief description of the changes introduced by this pull request.
+
+**Related Issue**
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+
+**Type of Change**
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Enhancement
+- [ ] Documentation update
+
+**Checklist:**
+- [ ] I have tested my changes thoroughly.
+- [ ] My code follows the project's coding standards.
+- [ ] I have added unit tests if applicable.
+- [ ] Documentation is updated to reflect the changes.
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TODO.md

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+# Dashboard Enhancements and Bug Fixes
+
+## Bugs to Fix
+- [x] Fix overDue filter in Dashboard.js to properly compare dates
+- [x] Optimize paymentHistory concatenation and sorting
+- [x] Replace loops with reduce for total calculations
+- [x] Fix typo "Recieved" to "Received" in Chart.js
+- [x] Fix Chart.js x-axis configuration for better date display
+
+## Enhancements
+- [x] Uncomment and integrate Donut chart in Dashboard.js
+- [x] Improve chart tooltips and responsiveness
+- [x] Enhance CSS for better mobile responsiveness
+- [x] Add better error handling and loading states
+
+## Running the App
+- [ ] Start MongoDB
+- [ ] Run server (npm start in server/)
+- [ ] Run client (npm start in client/)
+- [ ] Test dashboard functionality