docs: folder browsing screenshots and docs; translate folder counts

Retakes the explorer screenshots on 1.4.0 (they still showed 0.4.0) and adds
the Folders view in English and Portuguese. The folder rows' file count sat
inside .xp-lnm, which the DOM translator skips, so it stayed in Portuguese
in the English UI; it is now translated explicitly.

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

docs/interface.md

@@ -11,7 +11,7 @@ Guará has a desktop app (Tauri) and the same front end in the browser with `gua
 After a scan, results open in a file-manager style explorer built for thousands of items:
 
 - **Left:** navigation by type, real photo date (EXIF, by year and month), folder, camera, confidence and GPS, with an option to hide small files and duplicates.
-- **Center:** thumbnail grid or list, grouped by day or month, with virtual scrolling. A filter chip shows what is active and clears it in one click.
+- **Center:** thumbnail grid or list, grouped by day or month, with virtual scrolling, or the **Folders** view (below) to browse one folder at a time. A filter chip shows what is active and clears it in one click.
 - **Right:** details panel with the preview, folder, dates (taken, modified, created, accessed), camera, resolution and the file metadata. The badge shows the **confidence** of the file (high, medium or low).
 - **Bottom bar:** selection count and the recovery buttons. Recovery always goes to another folder and writes a manifest with MD5, SHA-1 and SHA-256.
 
@@ -19,6 +19,8 @@ Arrow keys move through the files, and Space opens the full-screen quick look. S
 
 ### Browsing by folder
 
+<p align="center"><img src="img/folders-light-en.png" width="900" alt="The Folders view: the root of the recovered files with DCIM ticked, Viagens partly ticked, the selection total at the bottom and the folder details on the right"></p>
+
 The third view button (the folder icon, next to grid and list) turns the explorer into a file manager over what was found. The center shows **one folder at a time**: its subfolders first, each with how many files and how much space it holds counting everything below it, then the files directly inside. A breadcrumb at the top (`Root › Documents › Project`) goes back up; double-click or Enter opens a folder, Backspace or Alt+↑ goes up, and clicking a folder in the sidebar tree jumps to it. Files found only by signature, which have no known folder, sit in **By signature** at the root. Filters (type, date, confidence…) still apply and change the counts.
 
 To recover, tick folders and files with their boxes; the selection survives navigation. Ticking a folder takes **everything inside it**, at any depth, even what the active filters hide. Unticking a subfolder or a file inside a ticked folder leaves the folder half-ticked and keeps that item out. The bottom bar shows the exact total, and **Recover selection** recreates each ticked folder in the destination **from itself down**: recovering `Documents/Clients/Project` writes `Project/...` with all its subfolders. Files ticked on their own go to the root of the destination, and two ticked folders with the same name become `Project` and `Project (2)`. The manifest with MD5, SHA-1 and SHA-256 is written as always.