refactor(ui): move features out of Settings, leaving it configuration

[SiteRelEnby]

Follow-up to #49. Part of #65.

#49 gave every feature a home in the drawer. This takes the feature entries back out of Settings, so each thing has one obvious place instead of two, and Settings goes back to being configuration.

Rows removed from Settings

Row	Was	Now
Reminders	Settings > Notifications & Lock	drawer > Engage
Relationships	Settings > System	drawer > System

Both are drawer destinations as of #49, and a feature listed in two places is exactly the ambiguity this set out to remove.

Routes off the settings/ prefix

The route names were the tell that these had been filed in the wrong drawer:

settings/notifications/reminders  ->  reminders
settings/relationships            ->  relationships
settings/relationships/graph      ->  relationships/graph
settings/support                  ->  support

Nothing outside SheafApp.kt referenced those strings (no deep links, notification intents or widgets), so this is contained.

Judgement calls

The relationship graph stays a drill-in from the relationships screen rather than becoming a drawer destination. It's a pan/zoom canvas: a drawer destination gets the bar/rail and an edge-swipe-to-open, and that edge-swipe would fight panning the graph. It's one tap from a drawer destination, which is enough.

Files and Support keep their Settings rows. Neither is a buried feature - Files is upload management that belongs with the other data tools, and Support is contact/policy info people reasonably look for in Settings. They're in the drawer too; duplicating a low-traffic info screen isn't the problem we were solving.

Settings after this

Account, Appearance, System (tags, custom fields, archived members), Safety, Data (files, export, import), Notifications & Lock (receiving, channels, devices, fronting notification, app lock), Server, Support, Danger zone, About. Configuration and data management, no features.

Testing

:app:assemblePlayRelease + :app:testPlayReleaseUnitTest green. Device checklist:

• Settings > Notifications & Lock no longer lists Reminders; drawer > Reminders opens it and create/edit/delete still work
• Settings > System no longer lists Relationships; drawer > Relationships opens it, types still manage, and the graph opens from there
• Graph still pans and zooms without the drawer interfering, and still uses the full width
• Back from Reminders / Relationships returns to Home rather than into Settings
• Reminder edit (reminders/{id}) and create (reminders/new) both resolve to the right screen
• Support opens from both the drawer and Settings

Remaining in this plan

3. Pinnable bar slots (persisted pins + edit screen) instead of the fixed three.