## Why
### Problem
The mobile bottom navigation bar showed only icons with no labels,
making it hard to identify each section at a glance — especially for new
users.
## What
### Changes
- Each nav item now renders its icon above a short text label
- Active item gets a subtle pill background (`bg-primary/15`) matching
the reference design
- Each button uses `flex-1` so items stretch to fill all available width
evenly
- Added `mobileTitle` to all nav items with short, space-conscious
labels: `Panel`, `Flujo`, `Cuentas`, `Movim.`, `Presup.`
- Removed the `__()` translation dependency from the mobile nav to avoid
a runtime crash that was causing icons to disappear entirely