commit 9979697acf4572746525a6d9abc5111e2b347c37
Author: MrUnknownDE <j.krueger@netstack.de>
Date:   Sun Dec 28 17:57:20 2025 +0100

    first commit

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..f7a6170
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,31 @@
+# Spotify API Credentials
+# Get these from https://developer.spotify.com/dashboard/
+SPOTIFY_CLIENT_ID=your_spotify_client_id
+SPOTIFY_CLIENT_SECRET=your_spotify_client_secret
+
+# YouTube/Google API Credentials
+# Get these from https://console.cloud.google.com/
+# Enable "YouTube Data API v3" and create OAuth 2.0 credentials
+YOUTUBE_CLIENT_ID=your_youtube_client_id
+YOUTUBE_CLIENT_SECRET=your_youtube_client_secret
+
+# Session Secret (generate a random string)
+SESSION_SECRET=your_random_session_secret_here
+
+# Server Port
+PORT=3000
+
+# Base URL (used for OAuth callbacks)
+# IMPORTANT: Spotify requires HTTPS for callbacks!
+# For local development, use a tool like local-ssl-proxy or ngrok
+BASE_URL=https://localhost:3000
+
+# Cache Settings
+# Path where analysis jobs are cached (relative or absolute)
+CACHE_PATH=./cache
+# Maximum playlist size (tracks) that can be analyzed
+MAX_PLAYLIST_SIZE=50
+
+# Rate Limiting
+# Delay between YouTube API calls in milliseconds
+RATE_LIMIT_DELAY_MS=2000
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3224a90
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,144 @@
+# Created by https://www.toptal.com/developers/gitignore/api/node
+# Edit at https://www.toptal.com/developers/gitignore?templates=node
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# 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
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# 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
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# 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/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# 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.*
+
+### Node Patch ###
+# Serverless Webpack directories
+.webpack/
+
+# Optional stylelint cache
+
+# SvelteKit build / generate output
+.svelte-kit
+
+# End of https://www.toptal.com/developers/gitignore/api/node
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..eab78ef
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,18 @@
+FROM node:22-alpine
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install --omit=dev
+
+# Copy source code
+COPY src/ ./src/
+
+# Expose port
+EXPOSE 3000
+
+# Start the application
+CMD ["node", "src/server.js"]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b46f3d5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,155 @@
+# Spotify to YouTube Music Migration Tool
+
+A Node.js web application that migrates your Spotify playlists to YouTube Music with a preview and review workflow.
+
+## ✨ Features
+
+- 🔐 **OAuth Login** - Secure authentication for Spotify and YouTube
+- 📋 **Playlist Browser** - View and select your Spotify playlists
+- 🔍 **Analysis Queue** - Pre-analyze tracks before migration with rate limiting
+- 👀 **Review & Edit** - Side-by-side comparison of matches, add manual links for missing tracks
+- 🔄 **Real-time Progress** - Live updates via Server-Sent Events
+- 💾 **Persistent Cache** - Search results cached to disk, survives restarts
+- 📊 **Quota Optimization** - Rate limiting and caching to preserve YouTube API quota
+- 🎨 **Modern UI** - Dark theme with glassmorphism design
+- 🐳 **Docker Ready** - Easy deployment with Docker Compose
+
+## 📋 Prerequisites
+
+### 1. Spotify API Credentials
+
+1. Go to [Spotify Developer Dashboard](https://developer.spotify.com/dashboard/)
+2. Create a new application
+3. Add `http://localhost:3000/auth/spotify/callback` to Redirect URIs
+4. Copy your **Client ID** and **Client Secret**
+
+### 2. YouTube/Google API Credentials
+
+1. Go to [Google Cloud Console](https://console.cloud.google.com/)
+2. Create a new project (or select existing)
+3. Enable **YouTube Data API v3**
+4. Go to **Credentials** → **Create Credentials** → **OAuth 2.0 Client ID**
+5. Configure OAuth consent screen (External, add your email as test user)
+6. Create OAuth client ID (Web application)
+7. Add `http://localhost:3000/auth/youtube/callback` to Authorized redirect URIs
+8. Copy your **Client ID** and **Client Secret**
+
+## 🚀 Setup
+
+### Option 1: Local Development
+
+```bash
+# Clone and enter directory
+cd sptify2yt
+
+# Install dependencies
+npm install
+
+# Copy environment template and add your API credentials
+cp .env.example .env
+nano .env  # or use your preferred editor
+
+# Start the server
+npm start
+```
+
+Open http://localhost:3000 in your browser.
+
+### Option 2: Docker
+
+```bash
+# Copy and configure environment
+cp .env.example .env
+nano .env
+
+# Build and run
+docker compose up -d
+```
+
+Open http://localhost:3000 in your browser.
+
+## ⚙️ Configuration
+
+All settings are configured via environment variables (`.env` file):
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `SPOTIFY_CLIENT_ID` | - | Spotify OAuth Client ID |
+| `SPOTIFY_CLIENT_SECRET` | - | Spotify OAuth Client Secret |
+| `YOUTUBE_CLIENT_ID` | - | Google OAuth Client ID |
+| `YOUTUBE_CLIENT_SECRET` | - | Google OAuth Client Secret |
+| `SESSION_SECRET` | - | Random string for session encryption |
+| `PORT` | `3000` | Server port |
+| `BASE_URL` | `http://localhost:3000` | Base URL for OAuth callbacks |
+| `CACHE_PATH` | `./cache` | Directory for persistent cache |
+| `MAX_PLAYLIST_SIZE` | `500` | Maximum tracks per playlist |
+| `RATE_LIMIT_DELAY_MS` | `2000` | Delay between YouTube API calls (ms) |
+
+## 📖 Usage
+
+### Workflow
+
+1. **Login** - Connect your Spotify and YouTube accounts
+2. **Select Playlist** - Choose a Spotify playlist to migrate
+3. **Analyze** - Click "Analyze Playlist" to search for YouTube matches
+4. **Review** - View side-by-side comparison:
+   - ✅ **Found** - Track matched on YouTube
+   - ❌ **Not found** - Add a manual YouTube link
+5. **Migrate** - Start the migration to create the YouTube playlist
+
+### Caching
+
+The app uses two levels of caching:
+
+1. **Analysis Jobs** - Complete analysis results saved to `./cache/job_*.json`
+2. **Search Cache** - Individual YouTube search results saved to `./cache/search_cache.json`
+
+Search results are cached for 30 days. If you analyze the same track again (even in a different playlist), it uses the cached result without making a new API call.
+
+## 📊 YouTube API Quota
+
+YouTube Data API has a daily quota of **10,000 units**. Each search costs ~100 units, allowing approximately **100 searches per day**.
+
+### How this app optimizes quota:
+
+| Feature | Savings |
+|---------|---------|
+| **Search Cache** | Reuses results for duplicate tracks |
+| **Rate Limiting** | 2s delay prevents burst usage |
+| **Pre-Analysis** | Only searches once, migration uses cached data |
+| **Manual Links** | Skip API calls for unknown tracks |
+
+## 🗂️ Project Structure
+
+```
+sptify2yt/
+├── src/
+│   ├── server.js              # Express server with SSE
+│   ├── routes/
+│   │   ├── auth.js            # OAuth routes
+│   │   ├── spotify.js         # Spotify API routes
+│   │   └── youtube.js         # YouTube API + migration
+│   ├── services/
+│   │   ├── analysisQueue.js   # Job queue with persistence
+│   │   └── searchCache.js     # YouTube search cache
+│   └── public/
+│       ├── index.html         # SPA frontend
+│       ├── styles.css         # Dark theme styles
+│       └── app.js             # Frontend logic
+├── cache/                     # Persistent cache (auto-created)
+├── .env.example               # Environment template
+├── Dockerfile
+├── docker-compose.yml
+└── package.json
+```
+
+## ⚠️ Notes
+
+- **YouTube Music Playlists** - YouTube and YouTube Music share playlists, so migrated playlists appear in both
+- **Track Matching** - Searches for "Artist - Track Name" in YouTube's Music category
+- **Manual Links** - For rare/unavailable tracks, paste any YouTube video URL
+- **Cache Cleanup** - Jobs older than 7 days and search results older than 30 days are automatically cleaned up
+
+## 📄 License
+
+MIT
diff --git a/cache/job_1766940808819_at6tdppx0.json b/cache/job_1766940808819_at6tdppx0.json
new file mode 100644
index 0000000..27bff38
--- /dev/null
+++ b/cache/job_1766940808819_at6tdppx0.json
@@ -0,0 +1,134 @@
+{
+  "id": "job_1766940808819_at6tdppx0",
+  "sessionId": "session_1766940791190_wjvz0ueby",
+  "playlist": {
+    "id": "6EmJB6Dtfrk54qBMJzyEHx",
+    "name": "pfank repeat",
+    "image": "https://mosaic.scdn.co/640/ab67616d00001e027e44b3c24e2bdef9928ce6c2ab67616d00001e02d43e8f24d477790a78c7b58fab67616d00001e02d5c0a5bc4afd1d9d16cac98eab67616d00001e02e908735737ca3e20be619da1"
+  },
+  "tracks": [
+    {
+      "spotifyId": "3f9RTvoln0k1FnIS5edKqD",
+      "name": "EASY PEAZY - Slowed & Reverb",
+      "artists": [
+        "ROMANTICA",
+        "Lestmor"
+      ],
+      "album": "EASY PEAZY (Slowed & Sped Up)",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "1yqaea9PLO8rttUlcNTlcB",
+      "name": "Komarovo (DVRST Phonk Remix)",
+      "artists": [
+        "DVRST",
+        "Igor Sklyar",
+        "Atomic Heart"
+      ],
+      "album": "Atomic Heart (Original Game Soundtrack) Vol.1",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "0C6DzlnpBBZ4T5KFFtNNQI",
+      "name": "STUCK IN A DAZE - SLOWED",
+      "artists": [
+        "SHIIIKARNO"
+      ],
+      "album": "STUCK IN A DAZE (SLOWED)",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "7ItZPW34p9g5hEBCRw5GOK",
+      "name": "Yours",
+      "artists": [
+        "EVILDXER"
+      ],
+      "album": "Yours",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "25u4PT1CAUcHwe3YQ3JfrH",
+      "name": "sorry mom, i'm making breakcore xd",
+      "artists": [
+        "usedcvnt"
+      ],
+      "album": "ultraviolet",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "0WVwOSGn9J8Ccq5wuBDLmJ",
+      "name": "143 ways to lose urself",
+      "artists": [
+        "usedcvnt"
+      ],
+      "album": "ultraviolet",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "0MFl9YQsAgxpBtEpXK8UA1",
+      "name": "wonderfulcore",
+      "artists": [
+        "usedcvnt"
+      ],
+      "album": "wonderfulcore",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "2p3LCdEMlQgs2ciXS3KIlM",
+      "name": "wake up Violet",
+      "artists": [
+        "usedcvnt"
+      ],
+      "album": "wonderfulcore",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "1e6ZXuLRtWnXhwvJftJYuB",
+      "name": "EASY PEAZY",
+      "artists": [
+        "ROMANTICA",
+        "Lestmor"
+      ],
+      "album": "EASY PEAZY",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    },
+    {
+      "spotifyId": "5Y4OwloGr9QSxZLZ5DXGte",
+      "name": "Broken Trust",
+      "artists": [
+        "SAY3AM",
+        "Staarz"
+      ],
+      "album": "Broken Trust",
+      "youtubeMatch": null,
+      "manualVideoId": null,
+      "status": "not_found"
+    }
+  ],
+  "status": "complete",
+  "progress": {
+    "current": 10,
+    "total": 10
+  },
+  "createdAt": 1766940808819,
+  "completedAt": 1766940827781,
+  "error": null
+}
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..1e06a5f
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,10 @@
+services:
+  app:
+    build: .
+    ports:
+      - "${PORT:-3000}:3000"
+    env_file:
+      - .env
+    environment:
+      - NODE_ENV=production
+    restart: unless-stopped
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..39eae74
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1459 @@
+{
+  "name": "sptify2yt",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "sptify2yt",
+      "version": "1.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "axios": "^1.7.9",
+        "dotenv": "^16.4.7",
+        "express": "^4.21.2",
+        "express-session": "^1.18.1",
+        "googleapis": "^144.0.0",
+        "spotify-web-api-node": "^5.0.2"
+      },
+      "engines": {
+        "node": ">=22.0.0"
+      }
+    },
+    "node_modules/accepts": {
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
+      "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
+      "license": "MIT",
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/agent-base": {
+      "version": "7.1.4",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">= 14"
+      }
+    },
+    "node_modules/array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
+      "license": "MIT"
+    },
+    "node_modules/asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==",
+      "license": "MIT"
+    },
+    "node_modules/axios": {
+      "version": "1.13.2",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.13.2.tgz",
+      "integrity": "sha512-VPk9ebNqPcy5lRGuSlKx752IlDatOjT9paPlm8A7yOuW2Fbvp4X3JznJtT4f0GzGLLiWE9W8onz51SqLYwzGaA==",
+      "license": "MIT",
+      "dependencies": {
+        "follow-redirects": "^1.15.6",
+        "form-data": "^4.0.4",
+        "proxy-from-env": "^1.1.0"
+      }
+    },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
+    "node_modules/bignumber.js": {
+      "version": "9.3.1",
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+      "license": "MIT",
+      "engines": {
+        "node": "*"
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+      "license": "MIT",
+      "dependencies": {
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+        "content-type": "~1.0.5",
+        "debug": "2.6.9",
+        "depd": "2.0.0",
+        "destroy": "~1.2.0",
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+        "iconv-lite": "~0.4.24",
+        "on-finished": "~2.4.1",
+        "qs": "~6.14.0",
+        "raw-body": "~2.5.3",
+        "type-is": "~1.6.18",
+        "unpipe": "~1.0.0"
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+      "engines": {
+        "node": ">= 0.8",
+        "npm": "1.2.8000 || >= 1.4.16"
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+    },
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+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
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diff --git a/package.json b/package.json
new file mode 100644
index 0000000..549edd7
--- /dev/null
+++ b/package.json
@@ -0,0 +1,31 @@
+{
+  "name": "sptify2yt",
+  "version": "1.0.0",
+  "description": "Migrate Spotify playlists to YouTube Music",
+  "main": "src/server.js",
+  "type": "module",
+  "engines": {
+    "node": ">=22.0.0"
+  },
+  "scripts": {
+    "start": "node src/server.js",
+    "dev": "node --watch src/server.js"
+  },
+  "dependencies": {
+    "axios": "^1.7.9",
+    "dotenv": "^16.4.7",
+    "express": "^4.21.2",
+    "express-session": "^1.18.1",
+    "googleapis": "^144.0.0",
+    "spotify-web-api-node": "^5.0.2"
+  },
+  "keywords": [
+    "spotify",
+    "youtube",
+    "music",
+    "migration",
+    "playlist"
+  ],
+  "author": "",
+  "license": "MIT"
+}
diff --git a/src/public/app.js b/src/public/app.js
new file mode 100644
index 0000000..8f5eda1
--- /dev/null
+++ b/src/public/app.js
@@ -0,0 +1,488 @@
+// State
+let authStatus = { spotify: { connected: false }, youtube: { connected: false } };
+let playlists = [];
+let selectedPlaylist = null;
+let selectedTracks = [];
+let currentJob = null;
+let eventSource = null;
+
+// Generate unique session ID
+const sessionId = `session_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+
+// Elements
+const loginView = document.getElementById('loginView');
+const playlistView = document.getElementById('playlistView');
+const analysisView = document.getElementById('analysisView');
+const progressView = document.getElementById('progressView');
+
+const spotifyLoginBtn = document.getElementById('spotifyLoginBtn');
+const youtubeLoginBtn = document.getElementById('youtubeLoginBtn');
+const spotifyStatus = document.getElementById('spotifyStatus');
+const youtubeStatus = document.getElementById('youtubeStatus');
+const continueBtn = document.getElementById('continueBtn');
+const logoutBtn = document.getElementById('logoutBtn');
+
+const playlistGrid = document.getElementById('playlistGrid');
+const backFromAnalysis = document.getElementById('backFromAnalysis');
+const analysisPlaylistImage = document.getElementById('analysisPlaylistImage');
+const analysisPlaylistName = document.getElementById('analysisPlaylistName');
+const analysisPlaylistCount = document.getElementById('analysisPlaylistCount');
+const startAnalysisBtn = document.getElementById('startAnalysisBtn');
+
+const analysisProgress = document.getElementById('analysisProgress');
+const analysisStatusText = document.getElementById('analysisStatusText');
+const analysisProgressBar = document.getElementById('analysisProgressBar');
+const analysisCurrentTrack = document.getElementById('analysisCurrentTrack');
+const analysisResults = document.getElementById('analysisResults');
+const comparisonList = document.getElementById('comparisonList');
+const statFound = document.getElementById('statFound');
+const statNotFound = document.getElementById('statNotFound');
+const startMigrationBtn = document.getElementById('startMigrationBtn');
+
+const progressCurrent = document.getElementById('progressCurrent');
+const progressTotal = document.getElementById('progressTotal');
+const progressBar = document.getElementById('progressBar');
+const currentTrackName = document.getElementById('currentTrackName');
+const progressLog = document.getElementById('progressLog');
+const migrationComplete = document.getElementById('migrationComplete');
+const completeStats = document.getElementById('completeStats');
+const playlistLink = document.getElementById('playlistLink');
+const newMigrationBtn = document.getElementById('newMigrationBtn');
+
+// Initialize
+document.addEventListener('DOMContentLoaded', init);
+
+async function init() {
+    await checkAuthStatus();
+    setupEventListeners();
+    setupSSE();
+    handleUrlParams();
+}
+
+function setupEventListeners() {
+    spotifyLoginBtn.addEventListener('click', () => window.location.href = '/auth/spotify');
+    youtubeLoginBtn.addEventListener('click', () => window.location.href = '/auth/youtube');
+    continueBtn.addEventListener('click', showPlaylistView);
+    logoutBtn.addEventListener('click', logout);
+    backFromAnalysis.addEventListener('click', () => showView('playlist'));
+    startAnalysisBtn.addEventListener('click', startAnalysis);
+    startMigrationBtn.addEventListener('click', startMigration);
+    newMigrationBtn.addEventListener('click', () => {
+        showView('playlist');
+        loadPlaylists();
+    });
+}
+
+function setupSSE() {
+    eventSource = new EventSource(`/api/progress/${sessionId}`);
+
+    eventSource.onmessage = (event) => {
+        const data = JSON.parse(event.data);
+        handleProgressUpdate(data);
+    };
+
+    eventSource.onerror = () => {
+        console.log('SSE connection error, reconnecting...');
+        setTimeout(setupSSE, 5000);
+    };
+}
+
+function handleUrlParams() {
+    const params = new URLSearchParams(window.location.search);
+    if (params.get('error')) {
+        alert('Authentication failed. Please try again.');
+    }
+    if (params.toString()) {
+        window.history.replaceState({}, '', '/');
+    }
+}
+
+// Auth
+async function checkAuthStatus() {
+    try {
+        const response = await fetch('/auth/status');
+        authStatus = await response.json();
+        updateAuthUI();
+    } catch (err) {
+        console.error('Failed to check auth status:', err);
+    }
+}
+
+function updateAuthUI() {
+    const spotifyIndicator = spotifyStatus.querySelector('.status-indicator');
+    const spotifyText = spotifyStatus.querySelector('.status-text');
+
+    if (authStatus.spotify.connected) {
+        spotifyIndicator.classList.add('connected');
+        spotifyText.textContent = `Connected as ${authStatus.spotify.user?.name || 'User'}`;
+        spotifyLoginBtn.textContent = '✓ Connected';
+        spotifyLoginBtn.disabled = true;
+    } else {
+        spotifyIndicator.classList.remove('connected');
+        spotifyText.textContent = 'Not connected';
+        spotifyLoginBtn.textContent = 'Login with Spotify';
+        spotifyLoginBtn.disabled = false;
+    }
+
+    const youtubeIndicator = youtubeStatus.querySelector('.status-indicator');
+    const youtubeText = youtubeStatus.querySelector('.status-text');
+
+    if (authStatus.youtube.connected) {
+        youtubeIndicator.classList.add('connected');
+        youtubeText.textContent = `Connected as ${authStatus.youtube.user?.name || 'User'}`;
+        youtubeLoginBtn.textContent = '✓ Connected';
+        youtubeLoginBtn.disabled = true;
+    } else {
+        youtubeIndicator.classList.remove('connected');
+        youtubeText.textContent = 'Not connected';
+        youtubeLoginBtn.textContent = 'Login with YouTube';
+        youtubeLoginBtn.disabled = false;
+    }
+
+    if (authStatus.spotify.connected && authStatus.youtube.connected) {
+        continueBtn.style.display = 'inline-flex';
+        logoutBtn.style.display = 'inline-flex';
+    } else {
+        continueBtn.style.display = 'none';
+        logoutBtn.style.display = 'none';
+    }
+}
+
+async function logout() {
+    try {
+        await fetch('/auth/logout', { method: 'POST' });
+        authStatus = { spotify: { connected: false }, youtube: { connected: false } };
+        updateAuthUI();
+        showView('login');
+    } catch (err) {
+        console.error('Logout failed:', err);
+    }
+}
+
+// Views
+function showView(view) {
+    loginView.style.display = view === 'login' ? 'block' : 'none';
+    playlistView.style.display = view === 'playlist' ? 'block' : 'none';
+    analysisView.style.display = view === 'analysis' ? 'block' : 'none';
+    progressView.style.display = view === 'progress' ? 'block' : 'none';
+}
+
+async function showPlaylistView() {
+    showView('playlist');
+    await loadPlaylists();
+}
+
+// Playlists
+async function loadPlaylists() {
+    playlistGrid.innerHTML = '<div class="loading-spinner">Loading playlists...</div>';
+
+    try {
+        const response = await fetch('/api/spotify/playlists');
+        if (!response.ok) throw new Error('Failed to load playlists');
+
+        playlists = await response.json();
+        renderPlaylists();
+    } catch (err) {
+        playlistGrid.innerHTML = '<div class="loading-spinner">Failed to load playlists. Please try again.</div>';
+        console.error(err);
+    }
+}
+
+function renderPlaylists() {
+    if (playlists.length === 0) {
+        playlistGrid.innerHTML = '<div class="loading-spinner">No playlists found.</div>';
+        return;
+    }
+
+    playlistGrid.innerHTML = playlists.map(playlist => `
+    <div class="playlist-card" data-id="${playlist.id}">
+      <img src="${playlist.image || 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect fill="%2318181b" width="100" height="100"/><text x="50" y="55" text-anchor="middle" fill="%2352525b" font-size="40">🎵</text></svg>'}" alt="${escapeHtml(playlist.name)}">
+      <h3>${escapeHtml(playlist.name)}</h3>
+      <p>${playlist.trackCount} tracks</p>
+    </div>
+  `).join('');
+
+    document.querySelectorAll('.playlist-card').forEach(card => {
+        card.addEventListener('click', () => selectPlaylist(card.dataset.id));
+    });
+}
+
+async function selectPlaylist(playlistId) {
+    selectedPlaylist = playlists.find(p => p.id === playlistId);
+    if (!selectedPlaylist) return;
+
+    showView('analysis');
+
+    analysisPlaylistImage.src = selectedPlaylist.image || 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect fill="%2318181b" width="100" height="100"/><text x="50" y="55" text-anchor="middle" fill="%2352525b" font-size="40">🎵</text></svg>';
+    analysisPlaylistName.textContent = selectedPlaylist.name;
+    analysisPlaylistCount.textContent = `${selectedPlaylist.trackCount} tracks`;
+
+    // Reset analysis UI
+    analysisProgress.style.display = 'none';
+    analysisResults.style.display = 'none';
+    startAnalysisBtn.style.display = 'inline-flex';
+    startAnalysisBtn.disabled = false;
+    comparisonList.innerHTML = '';
+    currentJob = null;
+
+    // Load tracks
+    try {
+        const response = await fetch(`/api/spotify/playlist/${playlistId}/tracks`);
+        if (!response.ok) throw new Error('Failed to load tracks');
+        selectedTracks = await response.json();
+    } catch (err) {
+        console.error('Failed to load tracks:', err);
+        selectedTracks = [];
+    }
+}
+
+// Analysis
+async function startAnalysis() {
+    if (!selectedPlaylist || selectedTracks.length === 0) return;
+
+    startAnalysisBtn.disabled = true;
+    startAnalysisBtn.textContent = 'Analyzing...';
+    analysisProgress.style.display = 'block';
+    analysisResults.style.display = 'none';
+    analysisProgressBar.style.width = '0%';
+    analysisStatusText.textContent = 'Starting analysis...';
+
+    try {
+        const response = await fetch('/api/youtube/analyze', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({
+                playlist: selectedPlaylist,
+                tracks: selectedTracks,
+                sessionId
+            })
+        });
+
+        const result = await response.json();
+        if (result.error) throw new Error(result.error);
+
+        currentJob = { id: result.jobId };
+    } catch (err) {
+        console.error('Analysis failed:', err);
+        analysisStatusText.textContent = 'Analysis failed. Please try again.';
+        startAnalysisBtn.disabled = false;
+        startAnalysisBtn.textContent = '🔍 Analyze Playlist';
+    }
+}
+
+function handleProgressUpdate(data) {
+    switch (data.type) {
+        // Analysis updates
+        case 'analysis_progress':
+            analysisStatusText.textContent = `Searching YouTube... (${data.current}/${data.total})`;
+            analysisProgressBar.style.width = `${(data.current / data.total) * 100}%`;
+            analysisCurrentTrack.textContent = `${data.track.artists.join(', ')} - ${data.track.name}`;
+            break;
+
+        case 'analysis_match':
+            // Update progress
+            analysisProgressBar.style.width = `${(data.current / data.total) * 100}%`;
+            break;
+
+        case 'analysis_complete':
+            showAnalysisResults(data.stats);
+            break;
+
+        // Migration updates
+        case 'status':
+            currentTrackName.textContent = data.message;
+            break;
+
+        case 'playlist_created':
+            addLogItem('Playlist created on YouTube', 'success');
+            break;
+
+        case 'processing':
+            currentTrackName.textContent = `${data.track.artists.join(', ')} - ${data.track.name}`;
+            progressCurrent.textContent = data.current;
+            progressBar.style.width = `${(data.current / data.total) * 100}%`;
+            break;
+
+        case 'track_added':
+            addLogItem(`✓ ${data.track}`, 'success');
+            break;
+
+        case 'track_failed':
+        case 'track_skipped':
+            addLogItem(`✗ ${data.track} - Skipped`, 'not-found');
+            break;
+
+        case 'complete':
+            showMigrationComplete(data);
+            break;
+
+        case 'error':
+            currentTrackName.textContent = `Error: ${data.message}`;
+            break;
+    }
+}
+
+async function showAnalysisResults(stats) {
+    analysisProgress.style.display = 'none';
+    startAnalysisBtn.style.display = 'none';
+    analysisResults.style.display = 'block';
+
+    // Fetch full job data
+    try {
+        const response = await fetch(`/api/youtube/analysis/${currentJob.id}`);
+        const job = await response.json();
+        currentJob = job;
+
+        // Update stats
+        statFound.textContent = stats.found;
+        statNotFound.textContent = stats.notFound;
+
+        // Render comparison table
+        renderComparisonTable(job.tracks);
+    } catch (err) {
+        console.error('Failed to fetch analysis results:', err);
+    }
+}
+
+function renderComparisonTable(tracks) {
+    comparisonList.innerHTML = tracks.map((track, index) => `
+    <div class="table-row ${track.status}" data-index="${index}">
+      <div class="col-spotify">
+        <div class="track-name">${escapeHtml(track.name)}</div>
+        <div class="track-artist">${escapeHtml(track.artists.join(', '))}</div>
+      </div>
+      <div class="col-status">
+        ${track.status === 'found' ? '<span class="status-badge found">✓ Found</span>' :
+            track.status === 'manual' ? '<span class="status-badge manual">✓ Manual</span>' :
+                '<span class="status-badge not-found">✗ Not found</span>'}
+      </div>
+      <div class="col-youtube">
+        ${track.status === 'found' && track.youtubeMatch ? `
+          <div class="youtube-match">
+            <img src="${track.youtubeMatch.thumbnail || ''}" alt="">
+            <div class="match-info">
+              <div class="match-title">${escapeHtml(track.youtubeMatch.title)}</div>
+              <div class="match-channel">${escapeHtml(track.youtubeMatch.channel)}</div>
+            </div>
+          </div>
+        ` : track.status === 'manual' && track.manualVideoId ? `
+          <div class="youtube-match manual">
+            <span class="manual-badge">Manual: ${track.manualVideoId}</span>
+          </div>
+        ` : `
+          <div class="manual-input">
+            <input type="text" 
+                   placeholder="Paste YouTube URL or Video ID" 
+                   class="manual-video-input"
+                   data-index="${index}">
+            <button class="btn btn-small btn-ghost save-manual-btn" data-index="${index}">Save</button>
+          </div>
+        `}
+      </div>
+    </div>
+  `).join('');
+
+    // Add event listeners for manual inputs
+    document.querySelectorAll('.save-manual-btn').forEach(btn => {
+        btn.addEventListener('click', () => saveManualVideo(parseInt(btn.dataset.index)));
+    });
+
+    document.querySelectorAll('.manual-video-input').forEach(input => {
+        input.addEventListener('keypress', (e) => {
+            if (e.key === 'Enter') {
+                saveManualVideo(parseInt(input.dataset.index));
+            }
+        });
+    });
+}
+
+async function saveManualVideo(trackIndex) {
+    const input = document.querySelector(`.manual-video-input[data-index="${trackIndex}"]`);
+    const videoId = input.value.trim();
+
+    if (!videoId) return;
+
+    try {
+        const response = await fetch(`/api/youtube/analysis/${currentJob.id}/track/${trackIndex}/manual`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ videoId })
+        });
+
+        const result = await response.json();
+        if (result.success) {
+            // Update local job data
+            currentJob.tracks[trackIndex].manualVideoId = result.videoId;
+            currentJob.tracks[trackIndex].status = 'manual';
+
+            // Re-render table
+            renderComparisonTable(currentJob.tracks);
+
+            // Update stats
+            const found = currentJob.tracks.filter(t => t.status === 'found' || t.status === 'manual').length;
+            const notFound = currentJob.tracks.filter(t => t.status === 'not_found').length;
+            statFound.textContent = found;
+            statNotFound.textContent = notFound;
+        }
+    } catch (err) {
+        console.error('Failed to save manual video:', err);
+    }
+}
+
+// Migration
+async function startMigration() {
+    if (!currentJob) return;
+
+    showView('progress');
+
+    progressCurrent.textContent = '0';
+    progressTotal.textContent = currentJob.tracks.length;
+    progressBar.style.width = '0%';
+    currentTrackName.textContent = 'Starting migration...';
+    progressLog.innerHTML = '';
+    migrationComplete.style.display = 'none';
+
+    // Show progress elements
+    document.querySelector('.progress-stats').style.display = 'block';
+    document.querySelector('.progress-bar-container').style.display = 'block';
+    document.querySelector('.current-track').style.display = 'flex';
+
+    try {
+        await fetch('/api/youtube/migrate', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({
+                jobId: currentJob.id,
+                sessionId
+            })
+        });
+    } catch (err) {
+        console.error('Migration request failed:', err);
+        currentTrackName.textContent = 'Migration failed. Please try again.';
+    }
+}
+
+function addLogItem(text, type) {
+    const item = document.createElement('div');
+    item.className = `log-item ${type}`;
+    item.textContent = text;
+    progressLog.appendChild(item);
+    progressLog.scrollTop = progressLog.scrollHeight;
+}
+
+function showMigrationComplete(data) {
+    migrationComplete.style.display = 'block';
+    completeStats.textContent = `${data.successCount} of ${data.total} tracks migrated successfully`;
+    playlistLink.href = data.playlistUrl;
+
+    document.querySelector('.progress-stats').style.display = 'none';
+    document.querySelector('.progress-bar-container').style.display = 'none';
+    document.querySelector('.current-track').style.display = 'none';
+}
+
+// Helpers
+function escapeHtml(text) {
+    const div = document.createElement('div');
+    div.textContent = text;
+    return div.innerHTML;
+}
diff --git a/src/public/index.html b/src/public/index.html
new file mode 100644
index 0000000..e75ffe7
--- /dev/null
+++ b/src/public/index.html
@@ -0,0 +1,185 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <meta name="description" content="Migrate your Spotify playlists to YouTube Music with ease">
+  <title>Spotify to YouTube Music | Playlist Migration</title>
+  <link rel="preconnect" href="https://fonts.googleapis.com">
+  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+  <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
+  <link rel="stylesheet" href="styles.css">
+</head>
+
+<body>
+  <div class="app">
+    <!-- Header -->
+    <header class="header">
+      <div class="logo">
+        <span class="logo-spotify">🎵</span>
+        <span class="logo-arrow">→</span>
+        <span class="logo-youtube">🎬</span>
+        <h1>Spotify to YouTube Music</h1>
+      </div>
+      <button id="logoutBtn" class="btn btn-ghost" style="display: none;">
+        Logout
+      </button>
+    </header>
+
+    <!-- Login View -->
+    <section id="loginView" class="view">
+      <div class="login-container">
+        <h2>Connect Your Accounts</h2>
+        <p class="subtitle">Login to both services to start migrating your playlists</p>
+
+        <div class="auth-cards">
+          <div class="auth-card spotify-card">
+            <div class="auth-card-header">
+              <span class="service-icon">🎵</span>
+              <span class="service-name">Spotify</span>
+            </div>
+            <div id="spotifyStatus" class="auth-status">
+              <span class="status-indicator disconnected"></span>
+              <span class="status-text">Not connected</span>
+            </div>
+            <button id="spotifyLoginBtn" class="btn btn-spotify">
+              Login with Spotify
+            </button>
+          </div>
+
+          <div class="auth-card youtube-card">
+            <div class="auth-card-header">
+              <span class="service-icon">🎬</span>
+              <span class="service-name">YouTube Music</span>
+            </div>
+            <div id="youtubeStatus" class="auth-status">
+              <span class="status-indicator disconnected"></span>
+              <span class="status-text">Not connected</span>
+            </div>
+            <button id="youtubeLoginBtn" class="btn btn-youtube">
+              Login with YouTube
+            </button>
+          </div>
+        </div>
+
+        <button id="continueBtn" class="btn btn-primary btn-large" style="display: none;">
+          Continue to Playlists
+        </button>
+      </div>
+    </section>
+
+    <!-- Playlist Selection View -->
+    <section id="playlistView" class="view" style="display: none;">
+      <div class="playlist-container">
+        <div class="view-header">
+          <h2>Select a Playlist</h2>
+          <p class="subtitle">Choose a Spotify playlist to migrate to YouTube Music</p>
+        </div>
+
+        <div id="playlistGrid" class="playlist-grid">
+          <div class="loading-spinner">Loading playlists...</div>
+        </div>
+      </div>
+    </section>
+
+    <!-- Analysis View (NEW) -->
+    <section id="analysisView" class="view" style="display: none;">
+      <div class="analysis-container">
+        <button id="backFromAnalysis" class="btn btn-ghost back-btn">
+          ← Back to playlists
+        </button>
+
+        <div class="playlist-header">
+          <img id="analysisPlaylistImage" class="playlist-cover" src="" alt="Playlist cover">
+          <div class="playlist-info">
+            <h2 id="analysisPlaylistName"></h2>
+            <p id="analysisPlaylistCount" class="track-count"></p>
+          </div>
+          <button id="startAnalysisBtn" class="btn btn-primary">
+            🔍 Analyze Playlist
+          </button>
+        </div>
+
+        <!-- Analysis Progress -->
+        <div id="analysisProgress" class="analysis-progress" style="display: none;">
+          <div class="progress-header">
+            <span class="pulse"></span>
+            <span id="analysisStatusText">Analyzing tracks...</span>
+          </div>
+          <div class="progress-bar-container">
+            <div id="analysisProgressBar" class="progress-bar" style="width: 0%"></div>
+          </div>
+          <p class="progress-detail"><span id="analysisCurrentTrack"></span></p>
+        </div>
+
+        <!-- Analysis Results -->
+        <div id="analysisResults" class="analysis-results" style="display: none;">
+          <div class="results-header">
+            <h3>Analysis Complete</h3>
+            <div class="results-stats">
+              <span class="stat found"><span id="statFound">0</span> found</span>
+              <span class="stat not-found"><span id="statNotFound">0</span> not found</span>
+            </div>
+          </div>
+
+          <div class="comparison-table">
+            <div class="table-header">
+              <div class="col-spotify">Spotify Track</div>
+              <div class="col-status">Status</div>
+              <div class="col-youtube">YouTube Match</div>
+            </div>
+            <div id="comparisonList" class="table-body"></div>
+          </div>
+
+          <div class="migration-actions">
+            <button id="startMigrationBtn" class="btn btn-primary btn-large">
+              🚀 Start Migration
+            </button>
+          </div>
+        </div>
+      </div>
+    </section>
+
+    <!-- Progress View -->
+    <section id="progressView" class="view" style="display: none;">
+      <div class="progress-container">
+        <h2>Migration in Progress</h2>
+
+        <div class="progress-stats">
+          <div class="stat">
+            <span id="progressCurrent" class="stat-value">0</span>
+            <span class="stat-label">/ <span id="progressTotal">0</span> tracks</span>
+          </div>
+        </div>
+
+        <div class="progress-bar-container">
+          <div id="progressBar" class="progress-bar" style="width: 0%"></div>
+        </div>
+
+        <div id="currentTrack" class="current-track">
+          <span class="pulse"></span>
+          <span id="currentTrackName">Preparing...</span>
+        </div>
+
+        <div id="progressLog" class="progress-log"></div>
+
+        <div id="migrationComplete" class="migration-complete" style="display: none;">
+          <div class="complete-icon">✓</div>
+          <h3>Migration Complete!</h3>
+          <p id="completeStats"></p>
+          <a id="playlistLink" href="#" target="_blank" class="btn btn-youtube btn-large">
+            Open in YouTube Music
+          </a>
+          <button id="newMigrationBtn" class="btn btn-ghost">
+            Migrate another playlist
+          </button>
+        </div>
+      </div>
+    </section>
+  </div>
+
+  <script src="app.js"></script>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/src/public/styles.css b/src/public/styles.css
new file mode 100644
index 0000000..5aeddce
--- /dev/null
+++ b/src/public/styles.css
@@ -0,0 +1,909 @@
+/* CSS Variables */
+:root {
+  --bg-primary: #0a0a0f;
+  --bg-secondary: #12121a;
+  --bg-card: rgba(255, 255, 255, 0.03);
+  --bg-card-hover: rgba(255, 255, 255, 0.06);
+
+  --text-primary: #ffffff;
+  --text-secondary: #a1a1aa;
+  --text-muted: #52525b;
+
+  --spotify-green: #1DB954;
+  --spotify-green-dark: #169c46;
+  --youtube-red: #FF0000;
+  --youtube-red-dark: #cc0000;
+
+  --accent-gradient: linear-gradient(135deg, #1DB954 0%, #FF0000 100%);
+  --glass-border: rgba(255, 255, 255, 0.08);
+  --glass-bg: rgba(255, 255, 255, 0.02);
+
+  --radius-sm: 8px;
+  --radius-md: 12px;
+  --radius-lg: 16px;
+  --radius-xl: 24px;
+
+  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
+  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
+  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
+
+  --transition-fast: 150ms ease;
+  --transition-normal: 250ms ease;
+  --transition-slow: 400ms ease;
+}
+
+/* Reset & Base */
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+  margin: 0;
+  padding: 0;
+}
+
+html {
+  font-size: 16px;
+  scroll-behavior: smooth;
+}
+
+body {
+  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
+  background: var(--bg-primary);
+  color: var(--text-primary);
+  min-height: 100vh;
+  line-height: 1.6;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+/* Animated background */
+body::before {
+  content: '';
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background:
+    radial-gradient(ellipse at 20% 20%, rgba(29, 185, 84, 0.08) 0%, transparent 50%),
+    radial-gradient(ellipse at 80% 80%, rgba(255, 0, 0, 0.06) 0%, transparent 50%);
+  pointer-events: none;
+  z-index: 0;
+}
+
+.app {
+  position: relative;
+  z-index: 1;
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 0 24px;
+  min-height: 100vh;
+}
+
+/* Header */
+.header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 24px 0;
+  border-bottom: 1px solid var(--glass-border);
+  margin-bottom: 40px;
+}
+
+.logo {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.logo-spotify,
+.logo-youtube {
+  font-size: 1.8rem;
+}
+
+.logo-arrow {
+  color: var(--text-muted);
+  font-size: 1.2rem;
+}
+
+.logo h1 {
+  font-size: 1.25rem;
+  font-weight: 600;
+  background: var(--accent-gradient);
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  background-clip: text;
+}
+
+/* Buttons */
+.btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  padding: 12px 24px;
+  font-size: 0.95rem;
+  font-weight: 500;
+  border: none;
+  border-radius: var(--radius-md);
+  cursor: pointer;
+  transition: all var(--transition-normal);
+  text-decoration: none;
+}
+
+.btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.btn-primary {
+  background: var(--accent-gradient);
+  color: white;
+  box-shadow: 0 4px 20px rgba(29, 185, 84, 0.3);
+}
+
+.btn-primary:hover:not(:disabled) {
+  transform: translateY(-2px);
+  box-shadow: 0 6px 30px rgba(29, 185, 84, 0.4);
+}
+
+.btn-spotify {
+  background: var(--spotify-green);
+  color: white;
+}
+
+.btn-spotify:hover:not(:disabled) {
+  background: var(--spotify-green-dark);
+  transform: translateY(-2px);
+}
+
+.btn-youtube {
+  background: var(--youtube-red);
+  color: white;
+}
+
+.btn-youtube:hover:not(:disabled) {
+  background: var(--youtube-red-dark);
+  transform: translateY(-2px);
+}
+
+.btn-ghost {
+  background: transparent;
+  color: var(--text-secondary);
+  border: 1px solid var(--glass-border);
+}
+
+.btn-ghost:hover:not(:disabled) {
+  background: var(--bg-card-hover);
+  color: var(--text-primary);
+}
+
+.btn-large {
+  padding: 16px 32px;
+  font-size: 1.05rem;
+}
+
+/* Views */
+.view {
+  animation: fadeIn var(--transition-slow);
+}
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+    transform: translateY(10px);
+  }
+
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+/* Login View */
+.login-container {
+  max-width: 800px;
+  margin: 0 auto;
+  padding: 60px 0;
+  text-align: center;
+}
+
+.login-container h2 {
+  font-size: 2.5rem;
+  font-weight: 700;
+  margin-bottom: 12px;
+}
+
+.subtitle {
+  color: var(--text-secondary);
+  font-size: 1.1rem;
+  margin-bottom: 48px;
+}
+
+.auth-cards {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
+  gap: 24px;
+  margin-bottom: 48px;
+}
+
+.auth-card {
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-xl);
+  padding: 32px;
+  backdrop-filter: blur(20px);
+  transition: all var(--transition-normal);
+}
+
+.auth-card:hover {
+  background: var(--bg-card-hover);
+  transform: translateY(-4px);
+  box-shadow: var(--shadow-lg);
+}
+
+.auth-card-header {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  margin-bottom: 20px;
+}
+
+.service-icon {
+  font-size: 2rem;
+}
+
+.service-name {
+  font-size: 1.5rem;
+  font-weight: 600;
+}
+
+.auth-status {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  margin-bottom: 24px;
+  padding: 12px;
+  background: var(--bg-secondary);
+  border-radius: var(--radius-md);
+}
+
+.status-indicator {
+  width: 10px;
+  height: 10px;
+  border-radius: 50%;
+  background: var(--youtube-red);
+}
+
+.status-indicator.connected {
+  background: var(--spotify-green);
+  box-shadow: 0 0 12px var(--spotify-green);
+}
+
+.status-text {
+  color: var(--text-secondary);
+  font-size: 0.9rem;
+}
+
+.auth-card .btn {
+  width: 100%;
+}
+
+/* Playlist Grid */
+.playlist-container,
+.review-container,
+.progress-container {
+  padding: 20px 0 60px;
+}
+
+.view-header {
+  text-align: center;
+  margin-bottom: 40px;
+}
+
+.view-header h2 {
+  font-size: 2rem;
+  font-weight: 700;
+  margin-bottom: 8px;
+}
+
+.playlist-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
+  gap: 20px;
+}
+
+.playlist-card {
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-lg);
+  padding: 16px;
+  cursor: pointer;
+  transition: all var(--transition-normal);
+}
+
+.playlist-card:hover {
+  background: var(--bg-card-hover);
+  transform: translateY(-4px);
+  box-shadow: var(--shadow-md);
+  border-color: var(--spotify-green);
+}
+
+.playlist-card img {
+  width: 100%;
+  aspect-ratio: 1;
+  object-fit: cover;
+  border-radius: var(--radius-md);
+  margin-bottom: 12px;
+  background: var(--bg-secondary);
+}
+
+.playlist-card h3 {
+  font-size: 0.95rem;
+  font-weight: 600;
+  margin-bottom: 4px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.playlist-card p {
+  font-size: 0.85rem;
+  color: var(--text-secondary);
+}
+
+/* Review View */
+.back-btn {
+  margin-bottom: 24px;
+}
+
+.playlist-header {
+  display: flex;
+  gap: 24px;
+  margin-bottom: 40px;
+  padding: 24px;
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-xl);
+}
+
+.playlist-cover {
+  width: 160px;
+  height: 160px;
+  object-fit: cover;
+  border-radius: var(--radius-lg);
+  background: var(--bg-secondary);
+}
+
+.playlist-info {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+}
+
+.playlist-info h2 {
+  font-size: 1.75rem;
+  font-weight: 700;
+  margin-bottom: 8px;
+}
+
+.track-count {
+  color: var(--text-secondary);
+  font-size: 1rem;
+}
+
+.tracks-container h3 {
+  font-size: 1.1rem;
+  font-weight: 600;
+  margin-bottom: 16px;
+  color: var(--text-secondary);
+}
+
+.track-list {
+  max-height: 400px;
+  overflow-y: auto;
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-lg);
+}
+
+.track-item {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  padding: 12px 16px;
+  border-bottom: 1px solid var(--glass-border);
+  transition: background var(--transition-fast);
+}
+
+.track-item:last-child {
+  border-bottom: none;
+}
+
+.track-item:hover {
+  background: var(--bg-card-hover);
+}
+
+.track-number {
+  width: 32px;
+  color: var(--text-muted);
+  font-size: 0.9rem;
+  text-align: center;
+}
+
+.track-info {
+  flex: 1;
+  min-width: 0;
+}
+
+.track-name {
+  font-weight: 500;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.track-artist {
+  font-size: 0.85rem;
+  color: var(--text-secondary);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.migration-actions {
+  margin-top: 32px;
+  text-align: center;
+}
+
+/* Progress View */
+.progress-container {
+  max-width: 600px;
+  margin: 0 auto;
+  text-align: center;
+}
+
+.progress-container h2 {
+  font-size: 2rem;
+  font-weight: 700;
+  margin-bottom: 40px;
+}
+
+.progress-stats {
+  margin-bottom: 24px;
+}
+
+.stat-value {
+  font-size: 3rem;
+  font-weight: 700;
+  background: var(--accent-gradient);
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  background-clip: text;
+}
+
+.stat-label {
+  font-size: 1.25rem;
+  color: var(--text-secondary);
+}
+
+.progress-bar-container {
+  height: 8px;
+  background: var(--bg-secondary);
+  border-radius: 4px;
+  overflow: hidden;
+  margin-bottom: 32px;
+}
+
+.progress-bar {
+  height: 100%;
+  background: var(--accent-gradient);
+  border-radius: 4px;
+  transition: width var(--transition-normal);
+}
+
+.current-track {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  padding: 16px 24px;
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-lg);
+  margin-bottom: 24px;
+}
+
+.pulse {
+  width: 12px;
+  height: 12px;
+  background: var(--spotify-green);
+  border-radius: 50%;
+  animation: pulse 1.5s ease-in-out infinite;
+}
+
+@keyframes pulse {
+
+  0%,
+  100% {
+    opacity: 1;
+    transform: scale(1);
+  }
+
+  50% {
+    opacity: 0.5;
+    transform: scale(1.2);
+  }
+}
+
+.progress-log {
+  max-height: 200px;
+  overflow-y: auto;
+  text-align: left;
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-lg);
+  padding: 16px;
+}
+
+.log-item {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 0;
+  font-size: 0.9rem;
+  border-bottom: 1px solid var(--glass-border);
+}
+
+.log-item:last-child {
+  border-bottom: none;
+}
+
+.log-item.success {
+  color: var(--spotify-green);
+}
+
+.log-item.error {
+  color: var(--youtube-red);
+}
+
+.log-item.not-found {
+  color: var(--text-muted);
+}
+
+/* Migration Complete */
+.migration-complete {
+  padding: 48px;
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-xl);
+  animation: fadeIn var(--transition-slow);
+}
+
+.complete-icon {
+  width: 80px;
+  height: 80px;
+  background: var(--spotify-green);
+  color: white;
+  font-size: 2.5rem;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 50%;
+  margin: 0 auto 24px;
+  box-shadow: 0 0 40px rgba(29, 185, 84, 0.4);
+}
+
+.migration-complete h3 {
+  font-size: 1.5rem;
+  font-weight: 700;
+  margin-bottom: 8px;
+}
+
+.migration-complete p {
+  color: var(--text-secondary);
+  margin-bottom: 24px;
+}
+
+.migration-complete .btn {
+  margin: 8px;
+}
+
+/* Loading */
+.loading-spinner {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 60px;
+  color: var(--text-secondary);
+}
+
+/* Scrollbar */
+::-webkit-scrollbar {
+  width: 8px;
+}
+
+::-webkit-scrollbar-track {
+  background: var(--bg-secondary);
+  border-radius: 4px;
+}
+
+::-webkit-scrollbar-thumb {
+  background: var(--glass-border);
+  border-radius: 4px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background: var(--text-muted);
+}
+
+/* Responsive */
+@media (max-width: 768px) {
+  .app {
+    padding: 0 16px;
+  }
+
+  .header {
+    flex-direction: column;
+    gap: 16px;
+    text-align: center;
+    padding: 16px 0;
+  }
+
+  .logo h1 {
+    font-size: 1.1rem;
+  }
+
+  .login-container h2 {
+    font-size: 1.75rem;
+  }
+
+  .playlist-header {
+    flex-direction: column;
+    align-items: center;
+    text-align: center;
+  }
+
+  .playlist-cover {
+    width: 120px;
+    height: 120px;
+  }
+
+  .comparison-table .table-header,
+  .comparison-table .table-row {
+    grid-template-columns: 1fr;
+    gap: 8px;
+  }
+
+  .col-youtube .manual-input {
+    flex-direction: column;
+  }
+}
+
+/* Analysis View */
+.analysis-container {
+  padding: 20px 0 60px;
+}
+
+.analysis-container .playlist-header {
+  align-items: center;
+}
+
+.analysis-container .playlist-info {
+  flex: 1;
+}
+
+/* Analysis Progress */
+.analysis-progress {
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-lg);
+  padding: 24px;
+  margin-bottom: 24px;
+}
+
+.progress-header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  margin-bottom: 16px;
+  font-weight: 500;
+}
+
+.progress-detail {
+  margin-top: 12px;
+  color: var(--text-secondary);
+  font-size: 0.9rem;
+}
+
+/* Analysis Results */
+.analysis-results {
+  animation: fadeIn var(--transition-slow);
+}
+
+.results-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 20px;
+}
+
+.results-header h3 {
+  font-size: 1.25rem;
+  font-weight: 600;
+}
+
+.results-stats {
+  display: flex;
+  gap: 16px;
+}
+
+.results-stats .stat {
+  padding: 6px 14px;
+  border-radius: var(--radius-md);
+  font-size: 0.9rem;
+  font-weight: 500;
+}
+
+.results-stats .stat.found {
+  background: rgba(29, 185, 84, 0.15);
+  color: var(--spotify-green);
+}
+
+.results-stats .stat.not-found {
+  background: rgba(255, 0, 0, 0.15);
+  color: var(--youtube-red);
+}
+
+/* Comparison Table */
+.comparison-table {
+  background: var(--bg-card);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-lg);
+  overflow: hidden;
+}
+
+.table-header {
+  display: grid;
+  grid-template-columns: 1fr 120px 1fr;
+  gap: 16px;
+  padding: 16px 20px;
+  background: var(--bg-secondary);
+  font-weight: 600;
+  font-size: 0.85rem;
+  color: var(--text-secondary);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.table-body {
+  max-height: 400px;
+  overflow-y: auto;
+}
+
+.table-row {
+  display: grid;
+  grid-template-columns: 1fr 120px 1fr;
+  gap: 16px;
+  padding: 14px 20px;
+  border-bottom: 1px solid var(--glass-border);
+  align-items: center;
+  transition: background var(--transition-fast);
+}
+
+.table-row:last-child {
+  border-bottom: none;
+}
+
+.table-row:hover {
+  background: var(--bg-card-hover);
+}
+
+.table-row.found {
+  border-left: 3px solid var(--spotify-green);
+}
+
+.table-row.not_found {
+  border-left: 3px solid var(--youtube-red);
+}
+
+.table-row.manual {
+  border-left: 3px solid #f59e0b;
+}
+
+/* Status Badges */
+.status-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 4px 10px;
+  border-radius: var(--radius-sm);
+  font-size: 0.8rem;
+  font-weight: 500;
+}
+
+.status-badge.found {
+  background: rgba(29, 185, 84, 0.15);
+  color: var(--spotify-green);
+}
+
+.status-badge.not-found {
+  background: rgba(255, 0, 0, 0.15);
+  color: var(--youtube-red);
+}
+
+.status-badge.manual {
+  background: rgba(245, 158, 11, 0.15);
+  color: #f59e0b;
+}
+
+/* YouTube Match */
+.youtube-match {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.youtube-match img {
+  width: 48px;
+  height: 36px;
+  object-fit: cover;
+  border-radius: 4px;
+  background: var(--bg-secondary);
+}
+
+.match-info {
+  min-width: 0;
+}
+
+.match-title {
+  font-size: 0.9rem;
+  font-weight: 500;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.match-channel {
+  font-size: 0.8rem;
+  color: var(--text-secondary);
+}
+
+.manual-badge {
+  font-size: 0.85rem;
+  color: #f59e0b;
+}
+
+/* Manual Input */
+.manual-input {
+  display: flex;
+  gap: 8px;
+}
+
+.manual-video-input {
+  flex: 1;
+  padding: 8px 12px;
+  background: var(--bg-secondary);
+  border: 1px solid var(--glass-border);
+  border-radius: var(--radius-sm);
+  color: var(--text-primary);
+  font-size: 0.85rem;
+  font-family: inherit;
+  outline: none;
+  transition: border-color var(--transition-fast);
+}
+
+.manual-video-input:focus {
+  border-color: var(--spotify-green);
+}
+
+.manual-video-input::placeholder {
+  color: var(--text-muted);
+}
+
+.btn-small {
+  padding: 8px 12px;
+  font-size: 0.8rem;
+}
\ No newline at end of file
diff --git a/src/routes/auth.js b/src/routes/auth.js
new file mode 100644
index 0000000..b65cb08
--- /dev/null
+++ b/src/routes/auth.js
@@ -0,0 +1,148 @@
+import { Router } from 'express';
+import SpotifyWebApi from 'spotify-web-api-node';
+import { google } from 'googleapis';
+
+const router = Router();
+
+// Spotify OAuth configuration
+const spotifyApi = new SpotifyWebApi({
+    clientId: process.env.SPOTIFY_CLIENT_ID,
+    clientSecret: process.env.SPOTIFY_CLIENT_SECRET,
+    redirectUri: `${process.env.BASE_URL || 'http://localhost:3000'}/auth/spotify/callback`
+});
+
+// YouTube OAuth configuration
+const oauth2Client = new google.auth.OAuth2(
+    process.env.YOUTUBE_CLIENT_ID,
+    process.env.YOUTUBE_CLIENT_SECRET,
+    `${process.env.BASE_URL || 'http://localhost:3000'}/auth/youtube/callback`
+);
+
+// Spotify scopes needed
+const SPOTIFY_SCOPES = [
+    'user-read-private',
+    'user-read-email',
+    'playlist-read-private',
+    'playlist-read-collaborative'
+];
+
+// YouTube scopes needed
+const YOUTUBE_SCOPES = [
+    'https://www.googleapis.com/auth/youtube',
+    'https://www.googleapis.com/auth/youtube.force-ssl'
+];
+
+// Check auth status
+router.get('/status', (req, res) => {
+    res.json({
+        spotify: {
+            connected: !!req.session.spotifyTokens,
+            user: req.session.spotifyUser || null
+        },
+        youtube: {
+            connected: !!req.session.youtubeTokens,
+            user: req.session.youtubeUser || null
+        }
+    });
+});
+
+// Spotify OAuth - Initiate
+router.get('/spotify', (req, res) => {
+    const authorizeURL = spotifyApi.createAuthorizeURL(SPOTIFY_SCOPES, 'spotify-auth');
+    res.redirect(authorizeURL);
+});
+
+// Spotify OAuth - Callback
+router.get('/spotify/callback', async (req, res) => {
+    const { code, error } = req.query;
+
+    if (error) {
+        return res.redirect('/?error=spotify_auth_failed');
+    }
+
+    try {
+        const data = await spotifyApi.authorizationCodeGrant(code);
+
+        req.session.spotifyTokens = {
+            accessToken: data.body.access_token,
+            refreshToken: data.body.refresh_token,
+            expiresAt: Date.now() + data.body.expires_in * 1000
+        };
+
+        // Get user info
+        spotifyApi.setAccessToken(data.body.access_token);
+        const userInfo = await spotifyApi.getMe();
+        req.session.spotifyUser = {
+            id: userInfo.body.id,
+            name: userInfo.body.display_name,
+            email: userInfo.body.email,
+            image: userInfo.body.images?.[0]?.url
+        };
+
+        res.redirect('/?spotify=connected');
+    } catch (err) {
+        console.error('Spotify auth error:', err);
+        res.redirect('/?error=spotify_auth_failed');
+    }
+});
+
+// YouTube OAuth - Initiate
+router.get('/youtube', (req, res) => {
+    const authorizeURL = oauth2Client.generateAuthUrl({
+        access_type: 'offline',
+        scope: YOUTUBE_SCOPES,
+        prompt: 'consent'
+    });
+    res.redirect(authorizeURL);
+});
+
+// YouTube OAuth - Callback
+router.get('/youtube/callback', async (req, res) => {
+    const { code, error } = req.query;
+
+    if (error) {
+        return res.redirect('/?error=youtube_auth_failed');
+    }
+
+    try {
+        const { tokens } = await oauth2Client.getToken(code);
+        oauth2Client.setCredentials(tokens);
+
+        req.session.youtubeTokens = {
+            accessToken: tokens.access_token,
+            refreshToken: tokens.refresh_token,
+            expiresAt: tokens.expiry_date
+        };
+
+        // Get user info
+        const youtube = google.youtube({ version: 'v3', auth: oauth2Client });
+        const channelResponse = await youtube.channels.list({
+            part: 'snippet',
+            mine: true
+        });
+
+        const channel = channelResponse.data.items?.[0];
+        req.session.youtubeUser = {
+            id: channel?.id,
+            name: channel?.snippet?.title,
+            image: channel?.snippet?.thumbnails?.default?.url
+        };
+
+        res.redirect('/?youtube=connected');
+    } catch (err) {
+        console.error('YouTube auth error:', err);
+        res.redirect('/?error=youtube_auth_failed');
+    }
+});
+
+// Logout
+router.post('/logout', (req, res) => {
+    req.session.destroy((err) => {
+        if (err) {
+            return res.status(500).json({ error: 'Logout failed' });
+        }
+        res.json({ success: true });
+    });
+});
+
+export default router;
diff --git a/src/routes/spotify.js b/src/routes/spotify.js
new file mode 100644
index 0000000..9e5ab51
--- /dev/null
+++ b/src/routes/spotify.js
@@ -0,0 +1,131 @@
+import { Router } from 'express';
+import SpotifyWebApi from 'spotify-web-api-node';
+
+const router = Router();
+
+// Helper to get authenticated Spotify API instance
+function getSpotifyApi(session) {
+    if (!session.spotifyTokens) {
+        throw new Error('Not authenticated with Spotify');
+    }
+
+    const spotifyApi = new SpotifyWebApi({
+        clientId: process.env.SPOTIFY_CLIENT_ID,
+        clientSecret: process.env.SPOTIFY_CLIENT_SECRET
+    });
+
+    spotifyApi.setAccessToken(session.spotifyTokens.accessToken);
+    spotifyApi.setRefreshToken(session.spotifyTokens.refreshToken);
+
+    return spotifyApi;
+}
+
+// Middleware to check Spotify auth
+function requireSpotifyAuth(req, res, next) {
+    if (!req.session.spotifyTokens) {
+        return res.status(401).json({ error: 'Not authenticated with Spotify' });
+    }
+    next();
+}
+
+// Get user's playlists
+router.get('/playlists', requireSpotifyAuth, async (req, res) => {
+    try {
+        const spotifyApi = getSpotifyApi(req.session);
+
+        let allPlaylists = [];
+        let offset = 0;
+        const limit = 50;
+        let hasMore = true;
+
+        while (hasMore) {
+            const response = await spotifyApi.getUserPlaylists({ limit, offset });
+            allPlaylists = allPlaylists.concat(response.body.items);
+
+            if (response.body.next) {
+                offset += limit;
+            } else {
+                hasMore = false;
+            }
+        }
+
+        const playlists = allPlaylists.map(playlist => ({
+            id: playlist.id,
+            name: playlist.name,
+            description: playlist.description,
+            trackCount: playlist.tracks.total,
+            image: playlist.images?.[0]?.url,
+            owner: playlist.owner.display_name
+        }));
+
+        res.json(playlists);
+    } catch (err) {
+        console.error('Error fetching playlists:', err);
+        res.status(500).json({ error: 'Failed to fetch playlists' });
+    }
+});
+
+// Get tracks from a playlist
+router.get('/playlist/:id/tracks', requireSpotifyAuth, async (req, res) => {
+    try {
+        const spotifyApi = getSpotifyApi(req.session);
+        const playlistId = req.params.id;
+
+        let allTracks = [];
+        let offset = 0;
+        const limit = 100;
+        let hasMore = true;
+
+        while (hasMore) {
+            const response = await spotifyApi.getPlaylistTracks(playlistId, {
+                limit,
+                offset,
+                fields: 'items(track(id,name,artists,album,duration_ms)),next'
+            });
+
+            allTracks = allTracks.concat(response.body.items);
+
+            if (response.body.next) {
+                offset += limit;
+            } else {
+                hasMore = false;
+            }
+        }
+
+        const tracks = allTracks
+            .filter(item => item.track) // Filter out null tracks
+            .map(item => ({
+                id: item.track.id,
+                name: item.track.name,
+                artists: item.track.artists.map(a => a.name),
+                album: item.track.album?.name,
+                duration: item.track.duration_ms
+            }));
+
+        res.json(tracks);
+    } catch (err) {
+        console.error('Error fetching tracks:', err);
+        res.status(500).json({ error: 'Failed to fetch tracks' });
+    }
+});
+
+// Get playlist info
+router.get('/playlist/:id', requireSpotifyAuth, async (req, res) => {
+    try {
+        const spotifyApi = getSpotifyApi(req.session);
+        const response = await spotifyApi.getPlaylist(req.params.id);
+
+        res.json({
+            id: response.body.id,
+            name: response.body.name,
+            description: response.body.description,
+            trackCount: response.body.tracks.total,
+            image: response.body.images?.[0]?.url
+        });
+    } catch (err) {
+        console.error('Error fetching playlist:', err);
+        res.status(500).json({ error: 'Failed to fetch playlist' });
+    }
+});
+
+export default router;
diff --git a/src/routes/youtube.js b/src/routes/youtube.js
new file mode 100644
index 0000000..d7cf30b
--- /dev/null
+++ b/src/routes/youtube.js
@@ -0,0 +1,451 @@
+import { Router } from 'express';
+import { google } from 'googleapis';
+import { sendProgress } from '../server.js';
+import * as queue from '../services/analysisQueue.js';
+import * as searchCache from '../services/searchCache.js';
+
+const router = Router();
+
+// Helper to get authenticated YouTube API instance
+function getYouTubeApi(session) {
+    if (!session.youtubeTokens) {
+        throw new Error('Not authenticated with YouTube');
+    }
+
+    const oauth2Client = new google.auth.OAuth2(
+        process.env.YOUTUBE_CLIENT_ID,
+        process.env.YOUTUBE_CLIENT_SECRET
+    );
+
+    oauth2Client.setCredentials({
+        access_token: session.youtubeTokens.accessToken,
+        refresh_token: session.youtubeTokens.refreshToken
+    });
+
+    return google.youtube({ version: 'v3', auth: oauth2Client });
+}
+
+// Middleware to check YouTube auth
+function requireYouTubeAuth(req, res, next) {
+    if (!req.session.youtubeTokens) {
+        return res.status(401).json({ error: 'Not authenticated with YouTube' });
+    }
+    next();
+}
+
+// Search for a video on YouTube (with caching)
+async function searchVideo(youtube, artists, trackName) {
+    // Check cache first
+    const cached = searchCache.getCachedSearch(artists, trackName);
+    if (cached !== null) {
+        console.log(`📦 Cache hit: ${artists.join(', ')} - ${trackName}`);
+        return cached;
+    }
+
+    // Not in cache, search YouTube
+    const query = `${artists.join(', ')} - ${trackName}`;
+    try {
+        const response = await youtube.search.list({
+            part: 'snippet',
+            q: query,
+            type: 'video',
+            videoCategoryId: '10', // Music category
+            maxResults: 1
+        });
+
+        let result = null;
+        if (response.data.items && response.data.items.length > 0) {
+            const video = response.data.items[0];
+            result = {
+                id: video.id.videoId,
+                title: video.snippet.title,
+                channel: video.snippet.channelTitle,
+                thumbnail: video.snippet.thumbnails?.default?.url
+            };
+        }
+
+        // Cache the result (even if null/not found)
+        searchCache.cacheSearch(artists, trackName, result);
+        console.log(`🔍 API search: ${artists.join(', ')} - ${trackName} → ${result ? 'found' : 'not found'}`);
+
+        return result;
+    } catch (err) {
+        console.error('Search error:', err.message);
+        return null;
+    }
+}
+
+// Create a playlist
+async function createPlaylist(youtube, title, description) {
+    const response = await youtube.playlists.insert({
+        part: 'snippet,status',
+        requestBody: {
+            snippet: {
+                title,
+                description: description || `Migrated from Spotify`
+            },
+            status: {
+                privacyStatus: 'private'
+            }
+        }
+    });
+
+    return response.data;
+}
+
+// Add video to playlist
+async function addToPlaylist(youtube, playlistId, videoId) {
+    await youtube.playlistItems.insert({
+        part: 'snippet',
+        requestBody: {
+            snippet: {
+                playlistId,
+                resourceId: {
+                    kind: 'youtube#video',
+                    videoId
+                }
+            }
+        }
+    });
+}
+
+// ============ ANALYSIS ENDPOINTS ============
+
+// Start analysis job
+router.post('/analyze', requireYouTubeAuth, async (req, res) => {
+    const { playlist, tracks, sessionId } = req.body;
+
+    if (!tracks || !Array.isArray(tracks) || tracks.length === 0) {
+        return res.status(400).json({ error: 'No tracks provided' });
+    }
+
+    if (!sessionId) {
+        return res.status(400).json({ error: 'Session ID required' });
+    }
+
+    // Check playlist size limit
+    const maxSize = queue.getMaxPlaylistSize();
+    if (tracks.length > maxSize) {
+        return res.status(400).json({
+            error: `Playlist too large. Maximum ${maxSize} tracks allowed.`,
+            maxSize,
+            trackCount: tracks.length
+        });
+    }
+
+    // Create job
+    try {
+        const job = queue.createJob(sessionId, playlist, tracks);
+
+        // Start analysis in background
+        analyzePlaylist(job.id, req.session).catch(err => {
+            console.error('Analysis error:', err);
+            queue.updateJobStatus(job.id, 'error', err.message);
+        });
+
+        res.json({
+            jobId: job.id,
+            status: job.status,
+            trackCount: tracks.length
+        });
+    } catch (err) {
+        res.status(400).json({ error: err.message });
+    }
+});
+
+// Background analysis function
+async function analyzePlaylist(jobId, session) {
+    const job = queue.getJob(jobId);
+    if (!job) return;
+
+    queue.updateJobStatus(jobId, 'analyzing');
+
+    const youtube = getYouTubeApi(session);
+    const delay = queue.getRateLimitDelay();
+
+    for (let i = 0; i < job.tracks.length; i++) {
+        const track = job.tracks[i];
+
+        // Update status to searching
+        job.tracks[i].status = 'searching';
+
+        // Send progress update
+        sendProgress(job.sessionId, {
+            type: 'analysis_progress',
+            jobId,
+            current: i + 1,
+            total: job.tracks.length,
+            track: {
+                name: track.name,
+                artists: track.artists
+            },
+            status: 'searching'
+        });
+
+        // Search YouTube (with caching)
+        const match = await searchVideo(youtube, track.artists, track.name);
+
+        if (match) {
+            queue.updateTrackMatch(jobId, i, match, 'found');
+            sendProgress(job.sessionId, {
+                type: 'analysis_match',
+                jobId,
+                current: i + 1,
+                total: job.tracks.length,
+                track: {
+                    name: track.name,
+                    artists: track.artists
+                },
+                match,
+                status: 'found'
+            });
+        } else {
+            queue.updateTrackMatch(jobId, i, null, 'not_found');
+            sendProgress(job.sessionId, {
+                type: 'analysis_match',
+                jobId,
+                current: i + 1,
+                total: job.tracks.length,
+                track: {
+                    name: track.name,
+                    artists: track.artists
+                },
+                match: null,
+                status: 'not_found'
+            });
+        }
+
+        // Rate limiting delay (except for last item)
+        if (i < job.tracks.length - 1) {
+            await new Promise(resolve => setTimeout(resolve, delay));
+        }
+    }
+
+    queue.updateJobStatus(jobId, 'complete');
+
+    // Send completion
+    const completedJob = queue.getJob(jobId);
+    const stats = {
+        found: completedJob.tracks.filter(t => t.status === 'found').length,
+        notFound: completedJob.tracks.filter(t => t.status === 'not_found').length,
+        total: completedJob.tracks.length
+    };
+
+    sendProgress(job.sessionId, {
+        type: 'analysis_complete',
+        jobId,
+        stats
+    });
+}
+
+// Get analysis job status
+router.get('/analysis/:jobId', requireYouTubeAuth, (req, res) => {
+    const job = queue.getJob(req.params.jobId);
+
+    if (!job) {
+        return res.status(404).json({ error: 'Job not found' });
+    }
+
+    res.json(job);
+});
+
+// Update manual video ID for a track
+router.post('/analysis/:jobId/track/:trackIndex/manual', requireYouTubeAuth, (req, res) => {
+    const { jobId, trackIndex } = req.params;
+    const { videoId } = req.body;
+
+    if (!videoId) {
+        return res.status(400).json({ error: 'Video ID required' });
+    }
+
+    // Extract video ID from URL if full URL provided
+    let extractedVideoId = videoId;
+    const urlMatch = videoId.match(/(?:youtube\.com\/watch\?v=|youtu\.be\/|youtube\.com\/embed\/)([^&\s]+)/);
+    if (urlMatch) {
+        extractedVideoId = urlMatch[1];
+    }
+
+    const success = queue.setManualVideoId(jobId, parseInt(trackIndex), extractedVideoId);
+
+    if (!success) {
+        return res.status(404).json({ error: 'Job or track not found' });
+    }
+
+    res.json({ success: true, videoId: extractedVideoId });
+});
+
+// ============ MIGRATION ENDPOINT ============
+
+// Migrate with pre-analyzed data
+router.post('/migrate', requireYouTubeAuth, async (req, res) => {
+    const { jobId, sessionId } = req.body;
+
+    const job = queue.getJob(jobId);
+
+    if (!job) {
+        return res.status(404).json({ error: 'Analysis job not found' });
+    }
+
+    if (job.status !== 'complete') {
+        return res.status(400).json({ error: 'Analysis not complete' });
+    }
+
+    try {
+        const youtube = getYouTubeApi(req.session);
+
+        // Create the playlist
+        sendProgress(sessionId, {
+            type: 'status',
+            message: 'Creating YouTube playlist...'
+        });
+
+        const playlist = await createPlaylist(youtube, job.playlist.name, `Migrated from Spotify`);
+
+        sendProgress(sessionId, {
+            type: 'playlist_created',
+            playlistId: playlist.id,
+            playlistUrl: `https://music.youtube.com/playlist?list=${playlist.id}`
+        });
+
+        // Track progress
+        let successCount = 0;
+        let skipCount = 0;
+        const results = [];
+
+        // Process tracks using cached matches
+        for (let i = 0; i < job.tracks.length; i++) {
+            const track = job.tracks[i];
+
+            // Get video ID (manual override or matched)
+            const videoId = track.manualVideoId || track.youtubeMatch?.id;
+
+            sendProgress(sessionId, {
+                type: 'processing',
+                current: i + 1,
+                total: job.tracks.length,
+                track: {
+                    name: track.name,
+                    artists: track.artists
+                }
+            });
+
+            if (videoId) {
+                try {
+                    await addToPlaylist(youtube, playlist.id, videoId);
+                    successCount++;
+                    results.push({
+                        track: track.name,
+                        status: 'success',
+                        videoId
+                    });
+
+                    sendProgress(sessionId, {
+                        type: 'track_added',
+                        current: i + 1,
+                        total: job.tracks.length,
+                        track: track.name,
+                        success: true
+                    });
+                } catch (err) {
+                    results.push({
+                        track: track.name,
+                        status: 'error',
+                        error: err.message
+                    });
+
+                    sendProgress(sessionId, {
+                        type: 'track_failed',
+                        current: i + 1,
+                        total: job.tracks.length,
+                        track: track.name,
+                        error: err.message,
+                        success: false
+                    });
+                }
+            } else {
+                skipCount++;
+                results.push({
+                    track: track.name,
+                    status: 'skipped',
+                    reason: 'No video ID'
+                });
+
+                sendProgress(sessionId, {
+                    type: 'track_skipped',
+                    current: i + 1,
+                    total: job.tracks.length,
+                    track: track.name
+                });
+            }
+
+            // Small delay to avoid rate limiting on playlist adds
+            await new Promise(resolve => setTimeout(resolve, 300));
+        }
+
+        // Send completion
+        sendProgress(sessionId, {
+            type: 'complete',
+            playlistId: playlist.id,
+            playlistUrl: `https://music.youtube.com/playlist?list=${playlist.id}`,
+            successCount,
+            skipCount,
+            total: job.tracks.length
+        });
+
+        res.json({
+            success: true,
+            playlistId: playlist.id,
+            playlistUrl: `https://music.youtube.com/playlist?list=${playlist.id}`,
+            successCount,
+            skipCount,
+            results
+        });
+
+    } catch (err) {
+        console.error('Migration error:', err);
+
+        sendProgress(sessionId, {
+            type: 'error',
+            message: err.message || 'Migration failed'
+        });
+
+        res.status(500).json({ error: 'Migration failed', details: err.message });
+    }
+});
+
+// Get user's YouTube playlists (for reference)
+router.get('/playlists', requireYouTubeAuth, async (req, res) => {
+    try {
+        const youtube = getYouTubeApi(req.session);
+
+        const response = await youtube.playlists.list({
+            part: 'snippet,contentDetails',
+            mine: true,
+            maxResults: 50
+        });
+
+        const playlists = response.data.items.map(playlist => ({
+            id: playlist.id,
+            name: playlist.snippet.title,
+            description: playlist.snippet.description,
+            trackCount: playlist.contentDetails.itemCount,
+            image: playlist.snippet.thumbnails?.default?.url
+        }));
+
+        res.json(playlists);
+    } catch (err) {
+        console.error('Error fetching YouTube playlists:', err);
+        res.status(500).json({ error: 'Failed to fetch playlists' });
+    }
+});
+
+// Get configuration limits and cache stats
+router.get('/config', (req, res) => {
+    res.json({
+        maxPlaylistSize: queue.getMaxPlaylistSize(),
+        rateLimitDelayMs: queue.getRateLimitDelay(),
+        searchCache: searchCache.getSearchCacheStats()
+    });
+});
+
+export default router;
diff --git a/src/server.js b/src/server.js
new file mode 100644
index 0000000..6d6477b
--- /dev/null
+++ b/src/server.js
@@ -0,0 +1,71 @@
+import 'dotenv/config';
+import express from 'express';
+import session from 'express-session';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+import authRoutes from './routes/auth.js';
+import spotifyRoutes from './routes/spotify.js';
+import youtubeRoutes from './routes/youtube.js';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+// Middleware
+app.use(express.json());
+app.use(express.static(join(__dirname, 'public')));
+
+// Session configuration
+app.use(session({
+  secret: process.env.SESSION_SECRET || 'dev-secret-change-in-production',
+  resave: false,
+  saveUninitialized: false,
+  cookie: {
+    secure: process.env.NODE_ENV === 'production',
+    maxAge: 24 * 60 * 60 * 1000 // 24 hours
+  }
+}));
+
+// Store SSE clients for progress updates
+const clients = new Map();
+
+// SSE endpoint for migration progress
+app.get('/api/progress/:sessionId', (req, res) => {
+  const sessionId = req.params.sessionId;
+  
+  res.setHeader('Content-Type', 'text/event-stream');
+  res.setHeader('Cache-Control', 'no-cache');
+  res.setHeader('Connection', 'keep-alive');
+  res.flushHeaders();
+
+  clients.set(sessionId, res);
+
+  req.on('close', () => {
+    clients.delete(sessionId);
+  });
+});
+
+// Helper to send progress updates
+export function sendProgress(sessionId, data) {
+  const client = clients.get(sessionId);
+  if (client) {
+    client.write(`data: ${JSON.stringify(data)}\n\n`);
+  }
+}
+
+// Routes
+app.use('/auth', authRoutes);
+app.use('/api/spotify', spotifyRoutes);
+app.use('/api/youtube', youtubeRoutes);
+
+// Health check
+app.get('/health', (req, res) => {
+  res.json({ status: 'ok' });
+});
+
+app.listen(PORT, () => {
+  console.log(`🎵 Spotify to YouTube Music Migration Tool`);
+  console.log(`🚀 Server running at http://localhost:${PORT}`);
+});
diff --git a/src/services/analysisQueue.js b/src/services/analysisQueue.js
new file mode 100644
index 0000000..03d41de
--- /dev/null
+++ b/src/services/analysisQueue.js
@@ -0,0 +1,248 @@
+import { existsSync, mkdirSync, writeFileSync, readFileSync, readdirSync, unlinkSync } from 'fs';
+import { join, resolve } from 'path';
+
+// Configuration from environment
+const CACHE_PATH = resolve(process.env.CACHE_PATH || './cache');
+const MAX_PLAYLIST_SIZE = parseInt(process.env.MAX_PLAYLIST_SIZE || '500', 10);
+const RATE_LIMIT_DELAY_MS = parseInt(process.env.RATE_LIMIT_DELAY_MS || '2000', 10);
+
+// Ensure cache directory exists
+if (!existsSync(CACHE_PATH)) {
+    mkdirSync(CACHE_PATH, { recursive: true });
+}
+
+// In-memory job cache (loaded from disk on demand)
+const jobs = new Map();
+
+/**
+ * Get cache file path for a job
+ */
+function getJobFilePath(jobId) {
+    return join(CACHE_PATH, `${jobId}.json`);
+}
+
+/**
+ * Save job to disk
+ */
+function saveJobToDisk(job) {
+    try {
+        const filePath = getJobFilePath(job.id);
+        writeFileSync(filePath, JSON.stringify(job, null, 2), 'utf-8');
+    } catch (err) {
+        console.error('Failed to save job to disk:', err.message);
+    }
+}
+
+/**
+ * Load job from disk
+ */
+function loadJobFromDisk(jobId) {
+    try {
+        const filePath = getJobFilePath(jobId);
+        if (existsSync(filePath)) {
+            const data = readFileSync(filePath, 'utf-8');
+            return JSON.parse(data);
+        }
+    } catch (err) {
+        console.error('Failed to load job from disk:', err.message);
+    }
+    return null;
+}
+
+/**
+ * Load all jobs from disk on startup
+ */
+function loadAllJobsFromDisk() {
+    try {
+        if (!existsSync(CACHE_PATH)) return;
+
+        const files = readdirSync(CACHE_PATH).filter(f => f.endsWith('.json'));
+        for (const file of files) {
+            const jobId = file.replace('.json', '');
+            const job = loadJobFromDisk(jobId);
+            if (job) {
+                jobs.set(jobId, job);
+            }
+        }
+        console.log(`📁 Loaded ${files.length} cached jobs from ${CACHE_PATH}`);
+    } catch (err) {
+        console.error('Failed to load jobs from disk:', err.message);
+    }
+}
+
+// Load existing jobs on module init
+loadAllJobsFromDisk();
+
+/**
+ * Get max playlist size limit
+ */
+export function getMaxPlaylistSize() {
+    return MAX_PLAYLIST_SIZE;
+}
+
+/**
+ * Get rate limit delay
+ */
+export function getRateLimitDelay() {
+    return RATE_LIMIT_DELAY_MS;
+}
+
+/**
+ * Create a new analysis job
+ */
+export function createJob(sessionId, playlist, tracks) {
+    // Check playlist size limit
+    if (tracks.length > MAX_PLAYLIST_SIZE) {
+        throw new Error(`Playlist exceeds maximum size of ${MAX_PLAYLIST_SIZE} tracks`);
+    }
+
+    const jobId = `job_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+
+    const job = {
+        id: jobId,
+        sessionId,
+        playlist: {
+            id: playlist.id,
+            name: playlist.name,
+            image: playlist.image
+        },
+        tracks: tracks.map(track => ({
+            spotifyId: track.id,
+            name: track.name,
+            artists: track.artists,
+            album: track.album,
+            youtubeMatch: null,
+            manualVideoId: null,
+            status: 'pending' // pending, searching, found, not_found, manual
+        })),
+        status: 'pending', // pending, analyzing, complete, error
+        progress: {
+            current: 0,
+            total: tracks.length
+        },
+        createdAt: Date.now(),
+        completedAt: null,
+        error: null
+    };
+
+    jobs.set(jobId, job);
+    saveJobToDisk(job);
+    return job;
+}
+
+/**
+ * Get a job by ID (from memory or disk)
+ */
+export function getJob(jobId) {
+    // Try memory first
+    if (jobs.has(jobId)) {
+        return jobs.get(jobId);
+    }
+
+    // Try loading from disk
+    const job = loadJobFromDisk(jobId);
+    if (job) {
+        jobs.set(jobId, job);
+    }
+    return job;
+}
+
+/**
+ * Get all jobs for a session
+ */
+export function getJobsBySession(sessionId) {
+    const sessionJobs = [];
+    for (const job of jobs.values()) {
+        if (job.sessionId === sessionId) {
+            sessionJobs.push(job);
+        }
+    }
+    return sessionJobs.sort((a, b) => b.createdAt - a.createdAt);
+}
+
+/**
+ * Update job status
+ */
+export function updateJobStatus(jobId, status, error = null) {
+    const job = jobs.get(jobId);
+    if (job) {
+        job.status = status;
+        if (error) job.error = error;
+        if (status === 'complete' || status === 'error') {
+            job.completedAt = Date.now();
+        }
+        saveJobToDisk(job);
+    }
+    return job;
+}
+
+/**
+ * Update track match result
+ */
+export function updateTrackMatch(jobId, trackIndex, youtubeMatch, status) {
+    const job = jobs.get(jobId);
+    if (job && job.tracks[trackIndex]) {
+        job.tracks[trackIndex].youtubeMatch = youtubeMatch;
+        job.tracks[trackIndex].status = status;
+        job.progress.current = trackIndex + 1;
+
+        // Save to disk periodically (every 10 tracks or on completion)
+        if ((trackIndex + 1) % 10 === 0 || trackIndex === job.tracks.length - 1) {
+            saveJobToDisk(job);
+        }
+    }
+    return job;
+}
+
+/**
+ * Set manual video ID for a track
+ */
+export function setManualVideoId(jobId, trackIndex, videoId) {
+    const job = jobs.get(jobId);
+    if (job && job.tracks[trackIndex]) {
+        job.tracks[trackIndex].manualVideoId = videoId;
+        job.tracks[trackIndex].status = 'manual';
+        saveJobToDisk(job);
+        return true;
+    }
+    return false;
+}
+
+/**
+ * Clean up old jobs (older than 7 days)
+ */
+export function cleanupOldJobs() {
+    const now = Date.now();
+    const maxAge = 7 * 24 * 60 * 60 * 1000; // 7 days
+
+    for (const [jobId, job] of jobs.entries()) {
+        if (now - job.createdAt > maxAge) {
+            jobs.delete(jobId);
+
+            // Delete from disk too
+            try {
+                const filePath = getJobFilePath(jobId);
+                if (existsSync(filePath)) {
+                    unlinkSync(filePath);
+                }
+            } catch (err) {
+                console.error('Failed to delete old job file:', err.message);
+            }
+        }
+    }
+}
+
+// Run cleanup every hour
+setInterval(cleanupOldJobs, 60 * 60 * 1000);
+
+export default {
+    createJob,
+    getJob,
+    getJobsBySession,
+    updateJobStatus,
+    updateTrackMatch,
+    setManualVideoId,
+    getRateLimitDelay,
+    getMaxPlaylistSize,
+    cleanupOldJobs
+};
diff --git a/src/services/searchCache.js b/src/services/searchCache.js
new file mode 100644
index 0000000..27bb505
--- /dev/null
+++ b/src/services/searchCache.js
@@ -0,0 +1,142 @@
+import { existsSync, mkdirSync, writeFileSync, readFileSync } from 'fs';
+import { join, resolve } from 'path';
+
+// Configuration from environment
+const CACHE_PATH = resolve(process.env.CACHE_PATH || './cache');
+const SEARCH_CACHE_FILE = join(CACHE_PATH, 'search_cache.json');
+
+// Ensure cache directory exists
+if (!existsSync(CACHE_PATH)) {
+    mkdirSync(CACHE_PATH, { recursive: true });
+}
+
+// In-memory search cache
+let searchCache = new Map();
+
+/**
+ * Load search cache from disk
+ */
+function loadSearchCache() {
+    try {
+        if (existsSync(SEARCH_CACHE_FILE)) {
+            const data = readFileSync(SEARCH_CACHE_FILE, 'utf-8');
+            const parsed = JSON.parse(data);
+            searchCache = new Map(Object.entries(parsed));
+            console.log(`🔍 Loaded ${searchCache.size} cached search results`);
+        }
+    } catch (err) {
+        console.error('Failed to load search cache:', err.message);
+        searchCache = new Map();
+    }
+}
+
+/**
+ * Save search cache to disk
+ */
+function saveSearchCache() {
+    try {
+        const obj = Object.fromEntries(searchCache);
+        writeFileSync(SEARCH_CACHE_FILE, JSON.stringify(obj, null, 2), 'utf-8');
+    } catch (err) {
+        console.error('Failed to save search cache:', err.message);
+    }
+}
+
+/**
+ * Generate cache key from artist and track name
+ */
+function generateCacheKey(artists, trackName) {
+    // Normalize: lowercase, trim, sort artists
+    const normalizedArtists = artists.map(a => a.toLowerCase().trim()).sort().join('|');
+    const normalizedTrack = trackName.toLowerCase().trim();
+    return `${normalizedArtists}::${normalizedTrack}`;
+}
+
+/**
+ * Get cached search result
+ */
+export function getCachedSearch(artists, trackName) {
+    const key = generateCacheKey(artists, trackName);
+    const cached = searchCache.get(key);
+
+    if (cached) {
+        // Check if cache is still valid (30 days)
+        const maxAge = 30 * 24 * 60 * 60 * 1000;
+        if (Date.now() - cached.cachedAt < maxAge) {
+            return cached.result;
+        }
+        // Expired, remove from cache
+        searchCache.delete(key);
+    }
+
+    return null;
+}
+
+/**
+ * Cache a search result
+ */
+export function cacheSearch(artists, trackName, result) {
+    const key = generateCacheKey(artists, trackName);
+    searchCache.set(key, {
+        result,
+        cachedAt: Date.now()
+    });
+
+    // Save to disk periodically (every 10 new entries)
+    if (searchCache.size % 10 === 0) {
+        saveSearchCache();
+    }
+}
+
+/**
+ * Force save cache to disk
+ */
+export function flushSearchCache() {
+    saveSearchCache();
+}
+
+/**
+ * Get cache statistics
+ */
+export function getSearchCacheStats() {
+    return {
+        entries: searchCache.size,
+        path: SEARCH_CACHE_FILE
+    };
+}
+
+/**
+ * Clear expired entries from cache
+ */
+export function cleanupSearchCache() {
+    const maxAge = 30 * 24 * 60 * 60 * 1000; // 30 days
+    const now = Date.now();
+    let removed = 0;
+
+    for (const [key, value] of searchCache.entries()) {
+        if (now - value.cachedAt > maxAge) {
+            searchCache.delete(key);
+            removed++;
+        }
+    }
+
+    if (removed > 0) {
+        saveSearchCache();
+        console.log(`🧹 Cleaned up ${removed} expired search cache entries`);
+    }
+}
+
+// Load cache on module init
+loadSearchCache();
+
+// Cleanup expired entries on startup and daily
+cleanupSearchCache();
+setInterval(cleanupSearchCache, 24 * 60 * 60 * 1000);
+
+export default {
+    getCachedSearch,
+    cacheSearch,
+    flushSearchCache,
+    getSearchCacheStats,
+    cleanupSearchCache
+};