docs: refresh docs and screenshots, drop em dashes, add scripts/screenshots.sh

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

CHANGELOG.md

@@ -4,6 +4,11 @@
 
 Format based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); versions follow SemVer.
 
+## [Unreleased]
+
+### Changed
+- Documentation brought up to date (ROADMAP version table, platform matrix, version stamps) and rewritten without em dashes. The interface screenshots were retaken from the current build, and `scripts/screenshots.sh` now regenerates them.
+
 ## [1.5.0] - 2026-11-03
 
 ### Added
@@ -23,7 +28,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); versio
 ## [1.3.5] - 2026-10-31
 
 ### Added
-- **One-click desktop update.** The "Update now" button actually downloads, verifies (SHA-256) and installs the new version now, instead of only linking to the Releases page. Works for all three desktop packages: AppImage (atomic self-replace), `.deb` (`dpkg -i`, no new password prompt — the app is already running as root/administrator by the time you click it), and the Windows installer (silent `/S` install). On Linux, the app restarts itself automatically; on Windows, the installer runs silently but the app does not reopen on its own yet — start it again once the install finishes.
+- **One-click desktop update.** The "Update now" button actually downloads, verifies (SHA-256) and installs the new version now, instead of only linking to the Releases page. Works for all three desktop packages: AppImage (atomic self-replace), `.deb` (`dpkg -i`, no new password prompt, the app is already running as root/administrator by the time you click it), and the Windows installer (silent `/S` install). On Linux, the app restarts itself automatically; on Windows, the installer runs silently but the app does not reopen on its own yet, start it again once the install finishes.
 
 ### Changed
 - **The repository moved to the Ciberfauna organization** (`ciberfauna/guara`, was `lucasrguerra/guara`). **Important notice for existing installations:** versions up to 1.3.4 have the old location baked into their update check; they will not find this release automatically. Download 1.3.5 once manually from the new Releases page, and future update checks will work through the new location.
@@ -31,7 +36,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); versio
 ## [1.3.4] - 2026-10-31
 
 ### Fixed
-- **Desktop app: only one window on startup.** The main window used to be visible from launch, so the unprivileged instance's normal window would show, flash while the system asked for the administrator password, and only then get replaced by the elevated relaunch's window a moment later. The window now stays hidden until elevation is resolved — either already elevated, elevation failed (the window then shows the warning), or this is the already-elevated relaunched instance — so only one window ever appears, matching Sabiá.
+- **Desktop app: only one window on startup.** The main window used to be visible from launch, so the unprivileged instance's normal window would show, flash while the system asked for the administrator password, and only then get replaced by the elevated relaunch's window a moment later. The window now stays hidden until elevation is resolved (either already elevated, elevation failed (the window then shows the warning), or this is the already-elevated relaunched instance) so only one window ever appears, matching Sabiá.
 
 ## [1.3.3] - 2026-10-30