Use the LibWebView history mirror to preserve traversable session
history across WebContent process swaps. WebContent reports snapshots to
the UI process, and new renderers can be seeded from the mirror.
Browser back and forward now resolve through the UI-owned used history
steps. WebContent still runs the spec traversal path when the current
renderer has enough matching state to do so.
Handle canceled and no-op UI navigations without leaving speculative
history entries or pending WebDriver waits behind. Preserve traversal
precheck state across synchronous IPC shutdown, and avoid overwriting a
restored target entry's persisted scroll state before the document has
adopted that entry.
Use the leading icon in the location field as a contextual page
indicator. While a page is loading, the field shows an indeterminate
activity indicator. Once loading finishes, it shows the page favicon
when available and falls back to the generic page icon where the toolkit
has one.
Keep the GTK implementation aligned with the other frontends by using
that slot only for loading and favicon state, without a separate
security icon.
This keeps single-tab windows from losing all visual feedback when the
tab bar is hidden, without adding a fake progress bar.
Add the complete browser UI:
- BrowserWindow: AdwHeaderBar with navigation, tab management via
AdwTabView/AdwTabBar, find-in-page, fullscreen, zoom, D-Bus
single-instance with open/activate handlers
- Tab: WebContentView lifecycle, ViewImplementation callbacks for
title, URL, favicon, cursor, tooltips, dialogs, window management
- LadybirdBrowserWindow: GtkBuilder template widget with toolbar,
tab bar, find bar, devtools banner, and hamburger menu
- LadybirdLocationEntry: URL entry with autocomplete, domain
highlighting, and security icon
- Menu: GAction-based context menus and application menu with
keyboard accelerators
- Dialogs: JS alert/confirm/prompt (AdwAlertDialog), color picker,
file picker, select dropdown, download save dialog, toast
- GtkBuilder .ui resources for browser window, location entry
completions, and list popovers
Updates Application and main.cpp to create browser windows and
handle D-Bus activation from remote instances.
