Fix nutrition photo analysis API integration and missing Anthropic config docs

[Copilot]

Food photo upload returned 500 errors due to frontend/backend API contract mismatches. Error logs showed duplicate /api/v1/api/v1/ paths and the backend expected different parameter names and response structures than the frontend provided.

Changes

API Integration Fixes

• Fixed endpoint path: /nutrition/analyze → /api/v1/nutrition/analyze in nutritionApi.ts
• Fixed multipart parameter: file → image in apiClient.ts to match backend @RequestParam("image")
• Aligned response DTOs: detectedFoods/total → items/totalNutrition to match backend FoodRecognitionResponse

Type Safety

• Updated TypeScript interfaces to match backend DTOs (RecognizedFood, NutritionInfo)
• Added converter function to transform backend response to UI format
• Made nutrition field optional to match Java DTO (no @NotNull annotation)

Documentation

• Added Anthropic API key setup to SETUP_API_KEYS.md (backend uses Claude Vision, not Gemini)
• Updated .env.example with ANTHROPIC_API_KEY configuration

// Before
const response = await api.uploadImage('/nutrition/analyze', imageUri);
// Parameter sent as 'file', expected 'image'
// Expected response.detectedFoods, got response.items

// After
const response = await api.uploadImage('/api/v1/nutrition/analyze', imageUri);
const detectedItems = response.items.map(convertToDetectedFood);
setTotal(response.totalNutrition);

The issue description mentioned Gemini API - note that food recognition requires Anthropic Claude API key, not Gemini.

Original prompt

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This section details on the original issue you should resolve

<issue_title>no nutrition card returned after adding a photo of food</issue_title>
<issue_description>{"code":5000,"message":"An unexpected error occurred. Please try again later.","timestamp":1764982592329,"path":"/api/v1/api/v1/me"}

Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/analyze:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
ReviewMealScreen.tsx:40 Food analysis failed: APIError: An unexpected error occurred. Please try again later.
at request (apiClient.ts:72:13)
at async Object.analyzeFoodImage (nutritionApi.ts:84:10)
at async analyze (ReviewMealScreen.tsx:36:26)
analyze @ ReviewMealScreen.tsx:40Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/nutrition/analyze:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
ReviewMealScreen.tsx:40 Food analysis failed: APIError: An unexpected error occurred. Please try again later.
at request (apiClient.ts:72:13)
at async Object.analyzeFoodImage (nutritionApi.ts:84:10)
at async analyze (ReviewMealScreen.tsx:36:26)
analyze @ ReviewMealScreen.tsx:40Understand this error
:8080/api/v1/api/v1/nutrition/summary/daily?userId=default-user:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/me:1 Failed to load resource: the server responded with a status of 500 ()Understand this error
:8080/api/v1/api/v1/me:1 Failed to load resource: the server responded with a status of 500 ()Understand this error

is it because i didn't activate my google cloud account though gemini api key is provided</issue_description>

<agent_instructions>please review fronted an...

• Fixes no nutrition card returned after adding a photo of food #30

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[Eliaaazzz]

no, I want to disable claude and switch to gemini 2.5 flash,