First version

README.md

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+# GO Vacation Planner
+
+Small PHP + SQLite web app for planning Danish vacation days, feriefridage, FLEX hours, and explicit unpaid fallback per date range.
+
+## Local run
+
+```bash
+php -S 127.0.0.1:8080
+```
+
+Open <http://127.0.0.1:8080>.
+
+The SQLite database is created automatically in `data/go.sqlite`.
+
+## Rules currently modeled
+
+- Vacation accrues monthly, default `2.08` days/month.
+- Feriefridage grant yearly, default `5` days/year.
+- Feriefridage must be used before `31 August` and expire before September planning.
+- FLEX days use `7.5h` Monday-Thursday and `7h` Friday.
+- Start balances are configured separately from current FLEX hours.
+- Monthly vacation-day corrections can be entered, e.g. `+1.2` or `-2.6` days.
+- Each date-range entry can individually allow unpaid fallback so only that range is converted to unpaid days if balances are insufficient.
+
+## Data
+
+Runtime database files are ignored by git. Back up `data/go.sqlite` if needed.