feat: add PantryChef MVP with Roboflow inference and GPT-4o-mini reci…

[supriyavikramsingh-sudo]

…pe generation

• Express backend with /api/detect (Roboflow) and /api/recipes (OpenAI) endpoints
• React/Vite frontend with image upload, canvas bounding box overlay, ingredient chips, recipe cards
• Integrated james-elcock/fridge-detection-ojugs/6 (77 classes, mAP 82.9%) after evaluating and rejecting deluxeviper/fridge-ingredients/2 (apple-dominated dataset)
• Confidence threshold at 0.35 with deduplication by class before chip render and recipe API call
• Upgraded multer to 2.x (CVE fix from 1.x)
• Bounding box scaling uses naturalWidth/clientWidth ratio for correct canvas alignment
• Recipe card splitting anchored on "estimated cook time" phrase to avoid GPT markdown variance
• API keys in server/.env, gitignored
• add detection and recipe images to assets

Model evaluation findings documented in README

What does this PR do?

Related Issue(s):

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Other:

Testing

• I have tested this change locally
• I have added/updated tests for this change

Test details:

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 where necessary, particularly in hard-to-understand areas
• My changes generate no new warnings or errors
• I have updated the documentation accordingly (if applicable)

Additional Context

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​vite@​6.4.3
	npm/​cors@​2.8.6
	npm/​react@​18.3.1
	npm/​multer@​2.1.1
	npm/​dotenv@​16.6.1
	npm/​express@​4.22.2
	npm/​@​vitejs/​plugin-react@​4.7.0
	npm/​react-dom@​18.3.1
	npm/​openai@​4.104.0
	npm/​axios@​1.17.0

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