Refresh screenshot galleries and repair portal upgrades

Use the September 30 hero on the website and README, add a shared screenshot gallery, and remove the old showcase images. Build image links locally and clean generated site output.

Back up the known development portal override during installation and report custom overrides before building. Keep source selections clear while letting blur show through unselected rows.

docs/README.md

@@ -6,6 +6,8 @@
 - [Configuration](configuration.md): KDL syntax, layouts, input, shortcuts, and displays.
 - [Why Ferese](why-ferese.md): layouts and the shared desktop theme.
 
+- [Screenshots](screenshots.md): desktop themes, overview and shell controls.
+
 ## Use the desktop
 
 - [Shortcuts and gestures](shortcuts.md): keyboard navigation, Super-drag, resize, and window grouping.

docs/installation.md

@@ -306,6 +306,9 @@ greeter's configuration. Reinstalling restores the desktop session entry.
 
 ## Screen sharing and recording
 
-The installer includes Ferese’s native ScreenCast portal. See
+The installer includes Ferese’s native ScreenCast portal. It backs up the old
+user service override that points to `~/.local/libexec/ferese`, so new sessions
+use the installed release. Custom overrides are preserved and reported before
+building. See
 [Screen sharing](screen-sharing.md) for consent, PipeWire setup, supported sources,
 and current recording limitations.

docs/screenshots.md

@@ -0,0 +1,45 @@
+# Screenshots
+
+Captured on September 30, 2026. Select an image to view it at full size.
+
+## Ferese Blue
+
+Settings and Control Center with the default wallpaper.
+
+[![Settings and Control Center with the default wallpaper.](images/screenshots/ferese-main-hero.png)](images/screenshots/ferese-main-hero.png)
+
+## Rosé Pine
+
+Theme previews, Control Center and the desktop clock.
+
+[![Theme previews, Control Center and the desktop clock.](images/screenshots/rose-pine-desktop.png)](images/screenshots/rose-pine-desktop.png)
+
+## Workspace overview
+
+Windows and workspaces over a custom wallpaper.
+
+[![Windows and workspaces over a custom wallpaper.](images/screenshots/rose-pine-overview.png)](images/screenshots/rose-pine-overview.png)
+
+## Power controls
+
+Power profiles and restart, power off and suspend actions.
+
+[![Power profiles and restart, power off and suspend actions.](images/screenshots/power-controls.png)](images/screenshots/power-controls.png)
+
+## Ferese Blue overview
+
+Application previews and workspace selection.
+
+[![Application previews and workspace selection.](images/screenshots/ferese-blue-overview.png)](images/screenshots/ferese-blue-overview.png)
+
+## Shortcut guide
+
+The login guide shows the configured keyboard shortcuts.
+
+[![The login guide shows the configured keyboard shortcuts.](images/screenshots/shortcut-guide.png)](images/screenshots/shortcut-guide.png)
+
+## Power confirmation
+
+A centered confirmation dialog with background blur.
+
+[![A centered confirmation dialog with background blur.](images/screenshots/power-confirmation.png)](images/screenshots/power-confirmation.png)

docs/why-ferese.md

@@ -10,7 +10,7 @@ Scrolling columns let you keep windows at useful widths and move through them
 horizontally. Tree tiling divides the screen into nested splits. Floating windows
 work alongside either layout, and overview shows windows across workspaces.
 
-![Ferese Overview showing windows and workspaces](images/ferese-overview.webp)
+![Ferese Overview showing windows and workspaces](images/screenshots/ferese-blue-overview.png)
 
 ## Change the desktop together
 
@@ -18,7 +18,7 @@ Choose a theme in Settings, then adjust the wallpaper, colors, font, corners,
 and motion. Changes apply live. Window corners and shell corners can be set
 independently.
 
-![Ferese Settings and Control Center in Gruvbox](images/ferese-gruvbox.webp)
+![Ferese Settings and Control Center in Rosé Pine](images/screenshots/rose-pine-desktop.png)
 
 For example, this changes shell corners: