Chores: weekly goals with custom reward tiers (everyone or chosen people)

- Admin-set reward tiers; points count Monday to Sunday and restart each week
- Per-person weekly totals, chores done, progress bar toward the next reward, week history
- Mark given / undo when a reward is handed over
- Rewards can be for everyone or only chosen people
- "This week" card on the family board
- Tests and README updated

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

README.md

@@ -184,7 +184,7 @@ Files are kept in the data folder under `mystore/` (up to 1 GB each; extensions
 
 **Notes** (turn it on per person): notes and checklists that are private, shared with the whole family, or shared with chosen people. Anyone it is shared with can edit it. Checklist items change one at a time (tick, add, edit, remove), so two people ticking the same list never overwrite each other, ticked items say who ticked them, and an open list follows other people's changes every few seconds. Text edits are checked against a revision, so a stale edit is refused instead of overwriting someone else's. Pin, colour, archive, search and filters (lists, notes, mine, shared, archived), ready-made lists (grocery, packing, weekend to-do), *Share to Chat*, and *Send the open items to Tasks*. Only the person who made a note (or an admin) changes who it is shared with or deletes it.
 
-**Chores** (turn it on per person): jobs that repeat daily, on weekdays, on chosen days of the week, weekly, monthly or happen once, given to one or more people or to anyone. Each person ticks off their own (an admin can tick for someone), finished chores earn points, and the board adds up the week and month. Only an admin adds or changes chores. A chore given to *anyone* is a pool: a person taps **Take it** to claim it for the day (it moves under their name, and nobody else can tick it; **Put back** returns it to the pool). Kept in `data/chores.json`.
+**Chores** (turn it on per person): jobs that repeat daily, on weekdays, on chosen days of the week, weekly, monthly or happen once, given to one or more people or to anyone. Each person ticks off their own (an admin can tick for someone), finished chores earn points, and the board adds up the week and month. **Weekly goals:** an admin makes reward tiers in Manage (for example 20 points: pick the movie, 40 points: ice cream). Points count Monday to Sunday and start again every Monday, with each person's total, the chores they did that week and a bar toward the next reward (also on the family board). Step back through earlier weeks with the arrows; nothing is deleted. When someone reaches a tier, an admin taps **Mark given** once the reward is handed over. Only an admin adds or changes chores. A chore given to *anyone* is a pool: a person taps **Take it** to claim it for the day (it moves under their name, and nobody else can tick it; **Put back** returns it to the pool). Kept in `data/chores.json`.
 
 **Family** (the page every account has next to Home): today and tomorrow's calendar, your chores and everyone's progress, the shopping list, shared notes and lists, recent chats and the tasks due this week. Each card only shows if the person has that part of the hub.