docs: experiment with generated documentation, let's keep it in git for

now

docs/by-gemini/user-guide.md

@@ -0,0 +1,61 @@
+# User Guide
+
+This guide is intended for club managers who use the FUJ Management system for day-to-day operations.
+
+## 🛠 Operational Workflow
+
+To keep the club finances up-to-date, follow these steps periodically (e.g., once a week):
+
+1.  **Sync Bank Transactions**:
+    Run the sync script to pull the latest payments from Fio.
+    ```bash
+    make sync
+    ```
+2.  **Infer Payments**:
+    Let the system automatically tag who paid for what.
+    ```bash
+    make infer
+    ```
+3.  **Manual Review (Google Sheets)**:
+    Open the Google Spreadsheet. Check rows with the `[?]` prefix in the `Person` column—these require human confirmation.
+    - If correct: Remove the `[?]` prefix.
+    - If incorrect: Manually fix the `Person` and `Purpose`.
+    - If a payment covers a special case: Use the **exceptions** sheet to override expected fees.
+4.  **Check Reconciliation Dashboard**:
+    Start the web app to see the final balance report.
+    ```bash
+    make web
+    ```
+    Navigate to `http://localhost:5001/reconcile`.
+
+---
+
+## 📊 Understanding the Dashboard
+
+### Reconciliation Page
+- **Green (OK)**: Member has paid exactly what was expected (or more).
+- **Orange (Partial)**: Some payment was received, but there's still a debt.
+- **Red (UNPAID)**: No payment recorded for this month.
+- **Blue (SURPLUS)**: Payment received for a month where no fee was expected.
+
+### Handling Debts
+If a member is in debt, you can click on the unpaid/partial cell to get a **QR Platba** link. You can send this link or screenshot to the member to facilitate quick payment.
+
+---
+
+## ❓ FAQ & Troubleshooting
+
+### Why is a payment "Unmatched"?
+A payment stays unmatched if neither the sender name nor the message contains recognizable member names or nicknames. 
+- **Fix**: Manually enter the member's name in the `Person` column in the Google Sheet.
+
+### How do I handle a "Family Discount" or "Prepaid Year"?
+Use the `exceptions` sheet in the Google Spreadsheet.
+1. Add the member's name (exactly as it appears in attendance).
+2. Enter the month (e.g., `2026-03`).
+3. Enter the new `Amount` (use `0` for prepaid).
+4. Add a `Note` for clarity.
+
+### The web app is slow to load.
+The app fetches data from Google Sheets API on every request. This ensures real-time data but can take a few seconds. The "Performance Breakdown" footer shows exactly where the time was spent.
+```