docs: Update README with new CSV output and script changes

README.md

@@ -2,16 +2,18 @@
 
 Wallos Fetcher is a command-line utility designed to retrieve and export subscription data from a self-hosted [Wallos](https://github.com/WallosApp/Wallos) instance—an open-source personal subscription tracker.
 
-This script helps you keep track of all your recurring expenses and share that information in human-readable or machine-readable formats, making it especially useful for budgeting, personal finance planning, and digital legacy preparation for family members.
+This script helps you keep track of all your recurring expenses and share that information in human-readable or machine-readable formats. It's especially useful for budgeting, personal finance planning, and digital legacy preparation for family members.
 
 ---
 
 ## ✨ Features
 
-- 📄 **Markdown output by default** – easy to read, easy to share
+- 📄 **Markdown output by default** – clean, readable reports
+- 📊 **CSV output** – spreadsheet-friendly for Excel, Numbers, etc.
 - 💾 Export as **Markdown**, **CSV**, or **JSON**
 - 🔍 Optionally include **full subscription details** (e.g., cycle, auto-renew, currency)
 - 🗃 Output to a custom file
+- 🧼 Modular, readable Bash script using secure temp file handling
 - 🧰 Lightweight, portable, and dependency-minimal (requires `curl` and `jq`)
 
 ---
@@ -44,6 +46,8 @@ chmod +x wallos-fetch.sh
 ./wallos-fetch.sh [options]
 ```
 
+> ℹ️ This script requires `curl` and `jq`. Run `./wallos-fetch.sh --help` to see all options.
+
 ### ✅ Example Commands
 
 | Purpose                             | Command                                                |
@@ -90,11 +94,34 @@ Structured export for use in spreadsheets or data processing tools.
 - Default fields: `id,name,price,next_payment,category_name,payment_method_name`
 - `--full` option adds: `currency_id,cycle,auto_renew`, etc.
 
+```csv
+"id","name","price","next_payment","category_name","payment_method_name"
+"1","Netflix","17.99","2025-04-21","Entertainment","Credit Card"
+"2","Spotify","9.99","2025-05-01","Music","PayPal"
+```
+
 ### 📦 JSON
 
-Raw response data from the Wallos API—useful for backups or integrations.
+Raw response data from the Wallos API—useful for backups, custom reporting, or integrations.
+
+```json
+{
+  "subscriptions": [
+    {
+      "id": 1,
+      "name": "Netflix",
+      "price": 17.99,
+      "currency_id": "USD",
+      "next_payment": "2025-04-21",
+      "category_name": "Entertainment",
+      "payment_method_name": "Credit Card"
+    }
+  ]
+}
+```
 
 ---
+
 ## 🔐 Authentication
 
 You can set your API key in one of two ways:
@@ -125,6 +152,8 @@ API_KEY="your_api_key_here"
 
 > ⚠️ Be cautious: hardcoding secrets in scripts can pose a security risk if the file is shared or version-controlled.
 
+---
+
 ## 📜 License
 
 This project is licensed under the [GNU General Public License v3.0 or later](https://www.gnu.org/licenses/gpl-3.0.html).
@@ -134,7 +163,7 @@ This project is licensed under the [GNU General Public License v3.0 or later](ht
 ## 🤝 Contributions
 
 Feedback, bug reports, and pull requests are welcome!  
-Submit issues or improvements via your Gitea repository.
+Submit issues or improvements via the Gitea repository.
 
 ---