test(ComparisonStatsCard): verify icon renders correctly for all supported icon names (#1069)

[Master-Bruce-Wayne]

Description

Fixes #1069

Pillar

• 🎨 Pillar 1 — New Theme Design
• 📐 Pillar 2 — Geometric SVG Improvement
• 🕐 Pillar 3 — Timezone Logic Optimization
• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

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• I have read the CONTRIBUTING.md file.
• I have tested these changes locally (localhost:3000/api/streak?user=YOUR_USERNAME).
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• I have made sure that i have only one commit to merge in this PR.
• The SVG output matches the CommitPulse "premium quality" aesthetic standard (no raw elements, smooth animations, correct fonts).
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The tests are running fine as tested -

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[Aamod007]

Adds 8 icon rendering tests for ComparisonStatsCard — verifies each lucide icon (Flame, TrendingUp, GitCommit, GitBranch, Users, UserPlus, Award) and unknown fallback render an SVG. 23/23 tests pass, no deletions, no blocking labels.

[github-actions]

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