feat(resume): complete Epic 4 - Resume Content Strategy and Guidelines

- Update resume data with comprehensive professional summary and optimized work experience highlights
- Add resume content tech-spec and strategy documentation for 2025 best practices
- Create resume guidelines reference document for content consistency
- Enhance PDF composable with openPdf preview function alongside downloadPdf
- Expand CSS banner hiding rules to block certificates.dev promotional content
- Add research documentation on resume best practices and ATS optimization
- Update i18n translations for resume content in English and Persian
- Include sample Ali Arghyani resume PDF template in design assets
- Refactor resume.en.ts with improved professional positioning and achievement metrics
- Update API route documentation for PDF generation story artifacts
- Establish foundation for Epic 4 sprint planning with tech specifications

docs/sprint-artifacts/4-1-create-resume-guidelines-reference.md

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+# Story 4.1: Create Resume Content Guide
+
+**Epic:** 4 - Resume Content Guidelines  
+**Story ID:** 4.1  
+**Status:** Ready  
+**Date:** 2025-12-01
+
+---
+
+## Description
+
+Create a Markdown reference guide containing extracted best practices from the resume research document (`docs/research/resume-research-2025.md`). This provides a quick-reference for writing resume content.
+
+## Acceptance Criteria
+
+- [ ] `docs/resume-content-guide.md` created
+- [ ] All key content from research is captured:
+  - [ ] Key statistics
+  - [ ] Section order by career stage
+  - [ ] Professional summary formula
+  - [ ] Action verbs (5 categories)
+  - [ ] Quantification templates (5 categories)
+  - [ ] ATS checklist (20 items)
+  - [ ] Clichés and outdated practices to avoid
+
+## Technical Details
+
+**File to Create:**
+- `docs/resume-content-guide.md`
+
+**No code dependencies required.**
+
+## Implementation Checklist
+
+- [ ] Create guide file
+- [ ] Add key statistics
+- [ ] Add section order
+- [ ] Add summary formula with examples
+- [ ] Add action verbs
+- [ ] Add quantification templates
+- [ ] Add ATS checklist
+- [ ] Add things to avoid
+
+## Definition of Done
+
+- Guide file created
+- Content matches research document
+- Easy to scan and reference
+
+---
+
+_Story generated by BMAD Tech-Spec Workflow_