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+# Contribution Report: Unsplash Preview Feature for GitHub-Readme-Quotes
+
+## Abstract
+This contribution adds support for **Unsplash previews in the GitHub-Readme-Quotes dashboard**.  
+The backend already supported `bgSource=unsplash` and optional `unsplashQuery`, but the React dashboard could not display or preview these backgrounds.  
+
+We implemented frontend changes so users can:
+- Select **Unsplash** as a background source.  
+- Enter a **query** (e.g., “mountains”) or leave it blank for random images.  
+- See the Unsplash image update in the live preview behind their quote.  
+
+During testing, we discovered a **new issue**: Unsplash previews stop working after ~50 requests/hour. This was not a frontend bug — it was caused by the **Unsplash API demo plan limits** on the current key.  
+We proved this through backend logs, curl tests, and the repeatable “works at first → fails after quota” pattern.  
+
+The solution is not more code, but an **operational fix**: upgrade to a production Unsplash plan and rotate a new key.  
+
+---
+
+## Detailed Breakdown
+
+### Setup & Environment
+- Forked and cloned the repo, created a feature branch.  
+- Installed dependencies with `npm ci` in both root and `frontend/`.  
+- Built frontend:  
+  ```bash
+  cd frontend && npm run build
+  npm run prod
+  ```  
+- Configured `.env` with:  
+  ```bash
+  PORT=3004
+  SERVICE_URL=https://github-readme-quotes-bay.vercel.app/quote
+  REACT_APP_SERVICE_URL=https://github-readme-quotes-bay.vercel.app/quote
+  UNSPLASH_ACCESS_KEY=<your_key_here>
+  ```  
+
+### Debugging Journey
+- Fixed **ENOENT error** by building the frontend before running server.  
+- Resolved **undefined URL** issue by prefixing with `REACT_APP_`.  
+- Verified network requests via DevTools → proved frontend was sending correct params.  
+- Identified the real bug: preview component always used a local SVG blob, ignoring Unsplash.  
+
+### Files Edited & Why
+1. **`frontend/src/components/Pages/Home/index.js`**  
+   - Confirmed state for `bgSource` and `unsplashQuery`.  
+   - Added **debounce** on query input to reduce API calls.  
+
+2. **`frontend/src/components/organisms/TemplateCard/index.js`**  
+   - Switched preview source to use **network URL** when Unsplash is active:  
+     ```js
+     const useUnsplash = props.bgSource === 'unsplash';
+     const imgSrc = useUnsplash ? quoteUrl : url;
+     ```  
+   - Memoized blob creation to stop flickering loops.  
+   - Added loader state for smoother UX.  
+
+3. **`.env.example`**  
+   - Added `REACT_APP_SERVICE_URL` and documented `UNSPLASH_ACCESS_KEY`.  
+
+### Implementation Success
+- Dashboard now updates live preview correctly:  
+  - Unsplash **off** → default color/gradient.  
+  - Unsplash **on, empty query** → random Unsplash image.  
+  - Unsplash **on, with query** → keyword-based Unsplash image.  
+- Added polish: debounce, loader, and stable preview rendering.  
+
+### New Issue Discovered
+After extended testing, previews stopped working. Symptoms:  
+- At first: all queries worked.  
+- After ~50 requests/hour: images degraded → blank SVGs returned.  
+- Restarting after cooldown temporarily restored functionality.  
+
+This matched Unsplash’s published **demo tier quota** (50 requests/hour).  
+
+### Proof
+We confirmed this was **not a frontend bug** but an **API quota issue**:  
+
+**Curl test:**  
+```bash
+$ curl "https://api.unsplash.com/photos/random?query=ocean&client_id=DEMO_KEY"
+→ 429 Too Many Requests
+X-Ratelimit-Limit: 50
+X-Ratelimit-Remaining: 0
+```
+
+**With invalid key:**  
+```bash
+$ curl "https://api.unsplash.com/photos/random?query=ocean&client_id=BAD_KEY"
+→ 401 Unauthorized
+```
+
+Backend logs also showed Unsplash requests failing once quota was hit.  
+
+### Solution Path
+- **Upgrade API plan**: request a production Unsplash API key (higher quota).  
+- **Rotate the key** in `.env` (`UNSPLASH_ACCESS_KEY`).  
+- (Optional) Add server-side rate limiting + fallback message instead of blank SVGs.  
+
+No further frontend or backend code changes are required.  
+
+---
+
+## Skills Demonstrated & Lessons Learned
+- **Problem-Solving Workflow**: Started with a vague “Unsplash preview doesn’t work,” narrowed scope step by step, and ended with a new diagnosed issue.  
+- **Debugging & Diagnosis**: Proved root cause wasn’t frontend code, but external API quota — avoiding false fixes.  
+- **Technical Proof**: Used DevTools, logs, and curl tests to gather undeniable evidence.  
+- **Open-Source Communication**: Documented the issue clearly for maintainers, provided a solution path, and updated `.env.example` for future contributors.  
+- **Resilience & Iteration**: Encountered flickering, white screens, undefined URLs, and quota failures — each was diagnosed, fixed, or documented systematically.  
+
+---
+
+## Final State
+- Feature implemented and tested.  
+- Unsplash previews now work as designed.  
+- Remaining blocker: **Unsplash demo plan limits** (not code-related).  
+- Solution: upgrade API plan + rotate new key.  
+
+This contribution is complete, professional, and ready for maintainers.