feat(ui): add maintenance page for task management

* Implement maintenance page with task and log display
* Add backfill and metadata retry functionality
* Integrate grid component for project display in thoughts page
* Update types for maintenance tasks and logs
* Enhance sidebar and shell for new maintenance navigation

migrations/_old/013_family_calendar.sql

@@ -0,0 +1,42 @@
+-- Extension 3: Family Calendar
+-- Multi-person family scheduling (single-user, no RLS)
+
+CREATE TABLE IF NOT EXISTS family_members (
+    id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name         TEXT NOT NULL,
+    relationship TEXT,
+    birth_date   DATE,
+    notes        TEXT,
+    created_at   TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE TABLE IF NOT EXISTS activities (
+    id               UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    family_member_id UUID REFERENCES family_members(id) ON DELETE SET NULL,
+    title            TEXT NOT NULL,
+    activity_type    TEXT,
+    day_of_week      TEXT,
+    start_time       TIME,
+    end_time         TIME,
+    start_date       DATE,
+    end_date         DATE,
+    location         TEXT,
+    notes            TEXT,
+    created_at       TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE TABLE IF NOT EXISTS important_dates (
+    id                   UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    family_member_id     UUID REFERENCES family_members(id) ON DELETE SET NULL,
+    title                TEXT NOT NULL,
+    date_value           DATE NOT NULL,
+    recurring_yearly     BOOLEAN NOT NULL DEFAULT false,
+    reminder_days_before INTEGER NOT NULL DEFAULT 7,
+    notes                TEXT,
+    created_at           TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_activities_dow       ON activities(day_of_week);
+CREATE INDEX IF NOT EXISTS idx_activities_member    ON activities(family_member_id);
+CREATE INDEX IF NOT EXISTS idx_activities_dates     ON activities(start_date, end_date);
+CREATE INDEX IF NOT EXISTS idx_important_dates_date ON important_dates(date_value);