Make Shell a category, the bar legible, and the dock a real dock

Desktop & Dock becomes Shell — Bar, Dock, Control Center, Tiling,
Workspaces — the home for everything Quickshell draws. The settings-
management cluster moves to System as Sync & Backup, Appearance's
Shell tab dissolves, and 24-hour time finally lives on Date & Time,
which always owned it.

The bar gets what it never had: a way to survive the wallpaper. A
second neutral text family (follow theme, or forced light or dark),
a one-layer shadow under every glyph, and a gradient scrim for
wallpapers nothing else survives — all off by default, pixel-identical
until asked. Widgets earn toggles (weather, media, clipboard, calendar
countdown), the vitals cluster stops leaving a dead pill behind, and
Control Center's sections learn to step aside.

The dock graduates from MVP: a context menu with window rows, pin,
unpin, quit and new-window; scroll an icon to cycle its windows; drag
to reorder on the dock itself; hover previews with one-shot captures;
and "Add App to Dock" in the launcher. Three real bugs died en route —
menus that slid away with the autohide, a readonly-property crash on
every menu open, and a drag that drifted half a slot per icon on side
docks. The pinned-apps editor in Settings becomes a drag strip.

166 contracts; the full suite is green except two live display and
switcher tests that cannot run behind a locked session — re-verified
on unlock.

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

tests/setup/projects-contract

@@ -22,7 +22,7 @@ set -uo pipefail
 
 repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
 helper="$repo_dir/config/dot/quickshell/scripts/panama-project"
-desktop_page="$repo_dir/config/dot/quickshell/modules/settings/DesktopPage.qml"
+workspaces_page="$repo_dir/config/dot/quickshell/modules/settings/WorkspacesPage.qml"
 service="$repo_dir/config/dot/quickshell/services/Projects.qml"
 
 findings=()
@@ -156,9 +156,9 @@ grep -q 'hl.dsp.window.move' "$helper" \
 
 # ── The page ─────────────────────────────────────────────────────────────────
 
-grep -q 'Projects.projects' "$desktop_page" \
-    || note 'the Desktop page does not list saved projects'
-grep -q 'confirmingProject' "$desktop_page" \
+grep -q 'Projects.projects' "$workspaces_page" \
+    || note 'the Workspaces page does not list saved projects'
+grep -q 'confirmingProject' "$workspaces_page" \
     || note 'a project can be deleted without confirming'
 grep -q '"list"' "$service" \
     || note 'the settings service never reads what is saved'