feat: p2 batch 28-31 reminders lists comments bang stats

Calendar events support multiple reminder offsets with presets and per-user defaults.

Lists index adds inline task entry and list property editing.

Generic entity comments on list detail. New bangs.stats dashboard widget.

Closes Gitea #28, #29, #30, #31. Migrations 0022 and 0023.

docs/tasks/91-list-comments.md

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+# 91 — Comments on lists and tasks
+
+## Goal
+
+Household members can comment on lists and individual list items using a reusable comment component.
+
+## What we decided
+
+- Generic `comments` table in `_core` keyed by `(entity_type, entity_id)`.
+- Reusable `EntityComments` client component in `src/components/comments/`.
+- Wired on list detail: list-level thread + per-item expandable comments.
+- Entity-generic design so notes/other modules can adopt later without schema changes.
+
+## Depends on
+
+- 11 (lists module)
+
+## Scope
+
+- Migration: `comments` table.
+- `_core/comments.ts`: list, add, delete (author-only).
+- `EntityComments` UI.
+- Lists detail page integration for `lists.list` and `lists.item`.
+
+## Out of scope
+
+- Comments on notes/calendar (future adoption of same component).
+- Rich-text comments (plain text only).
+
+## Acceptance criteria
+
+- [x] Comment on a list
+- [x] Comment on a task/item
+- [x] Household members see each other's comments
+- [x] Component is entity-generic (documented in brief)
+
+## Notes
+
+- Gitea: [ginnoir/famapp#30](https://gitea.ginnoir.com/ginnoir/famapp/issues/30)