🔧 Setup CI/CD Pipeline, Code Quality, and Comprehensive Documentation

.eslintrc.json

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+{
+	"root": true,
+	"extends": ["eslint:recommended", "prettier"],
+	"parserOptions": {
+		"sourceType": "module",
+		"ecmaVersion": 2020
+	},
+	"env": {
+		"browser": true,
+		"es2017": true,
+		"node": true
+	},
+	"overrides": [
+		{
+			"files": ["*.svelte"],
+			"parser": "svelte-eslint-parser",
+			"extends": ["plugin:svelte/recommended"],
+			"parserOptions": {
+				"parser": "@typescript-eslint/parser"
+			}
+		}
+	],
+	"rules": {
+		"no-unused-vars": ["error", { "argsIgnorePattern": "^_" }]
+	}
+}

.github/workflows/ci.yml

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+name: CI/CD Pipeline
+
+on:
+  push:
+    branches: [main, develop]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+      - run: npm ci
+      - run: npm run lint
+      - run: npm run check
+      - run: npm run test
+      - run: npm run build
+
+  security:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+      - run: npm ci
+      - run: npm audit --audit-level moderate
+
+  deploy:
+    needs: [test, security]
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main'
+    steps:
+      - uses: actions/checkout@v4
+      - uses: amondnet/vercel-action@v25
+        with:
+          vercel-token: ${{ secrets.VERCEL_TOKEN }}
+          vercel-project-id: ${{ secrets.PROJECT_ID }}

.prettierignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Dependency directories
+node_modules/
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+public
+
+# Storybook build outputs
+.out
+.storybook-out
+storybook-static
+
+# Rollup.js default build output
+dist/
+
+# Uncomment the public line if your project uses Gatsby
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# https://create-react-app.dev/docs/using-the-public-folder/#docsNav
+# public
+
+# Storybook build outputs
+.out
+.storybook-out
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# SvelteKit
+.svelte-kit
+
+# Vercel
+.vercel
+
+# Vite
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*
+
+# Environment variables
+.env
+.env.local
+.env.*.local
+
+# IDEs
+.vscode
+.idea
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Testing
+coverage/
+.nyc_output
+
+# Temporary files
+/tmp
+
+# Build artifacts
+dist/
+build/

.prettierrc

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+{
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "es5",
+	"printWidth": 100,
+	"plugins": ["prettier-plugin-svelte"],
+	"overrides": [
+		{
+			"files": "*.svelte",
+			"options": {
+				"parser": "svelte"
+			}
+		}
+	]
+}

API.md

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+# Petalytics API Documentation
+
+## AI Analysis Integration
+
+Petalytics integrates directly with OpenRouter API for AI-powered pet insights.
+
+### Authentication
+Users provide their own OpenRouter API key through the Guardian Panel.
+
+### Analysis Request Format
+```typescript
+interface AnalysisRequest {
+  pet: {
+    name: string;
+    breed: string;
+    age: number;
+    gender: 'male' | 'female';
+  };
+  entry: {
+    content: string;
+    date: string;
+    mood?: string;
+    activityLevel?: string;
+  };
+  recentHistory: JournalEntry[];
+}
+```
+
+### Analysis Response Format
+
+```typescript
+interface AnalysisResult {
+  summary: string;
+  moodTrend: 'improving' | 'stable' | 'concerning';
+  activityLevel: 'low' | 'normal' | 'high';
+  healthConcerns: string[];
+  recommendations: string[];
+  nextCheckupSuggestion?: string;
+}
+```
+
+### Example Usage
+
+```javascript
+import { AIAnalyzer } from '$lib/utils/ai-analysis';
+
+const analyzer = new AIAnalyzer(apiKey);
+const result = await analyzer.analyzeJournalEntry(pet, entry);
+```
+
+## Data Export/Import
+
+### Export Format (JSONL)
+
+Each line contains a JSON object:
+
+```jsonl
+{"version": "1.0.0"}
+{"exportDate": "2025-01-01T00:00:00.000Z"}
+{"pet": {"id": "123", "name": "Buddy", ...}}
+{"aiAnalyses": {"entry-1": {"summary": "...", ...}}}
+```
+
+### Import Validation
+
+* File must have `.jsonl` extension
+* Version compatibility checking
+* Data structure validation
+* Duplicate handling
+
+## LocalStorage Schema
+
+### Pet Data
+
+```javascript
+localStorage.setItem('petalytics-pets', JSON.stringify([
+  {
+    id: string,
+    name: string,
+    breed: string,
+    age: number,
+    profileImageUrl?: string,
+    journalEntries: JournalEntry[]
+  }
+]));
+```
+
+### Guardian Data
+
+```javascript
+localStorage.setItem('petalytics-guardian', JSON.stringify({
+  name: string,
+  apiKey: string,
+  preferences: object,
+  apiKeyValid: boolean
+}));
+```