v0.1.3: redesign the Sankey pipeline layout

- Spread columns by rank among the stages actually present, so sparse
  pipelines fill the width instead of leaving dead stretches
- Top-align columns: the funnel's success path runs level along the top
  and drop-off ribbons only ever descend
- Give each ribbon its slot per node side (outgoing by target height,
  incoming by source height) so ribbons stop braiding over each other
- Move the last column's labels to its left so they always stay
  on-screen, with a theme halo to stay legible over ribbons
- Never hide small-node labels; elide with tooltip instead
- Guarantee columns and ribbons fit the viewport (clamp-aware scale,
  spill-proof ribbon thickness)
- Debounce resize relayouts and stop re-querying SQLite on resize
- Canonicalize stage names on write (CLI "rejected" -> "Rejected") and
  repair pre-existing rows on database open
- Take Sankey node width/padding from Kirigami units
- Add QuickShapesPrivate configure-time guard for QtQuick.Shapes
- Extend sankeylayouttest: viewport fit, ribbon containment, slot
  ordering, sparse-column spread, canonicalization, degenerate sizes
- README: build-dependency and generator fixes, document SettingsPage

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_019FXfh48mASRsE1WEhy9jcM

README.md

@@ -100,8 +100,8 @@ Requires Qt 6, KDE Frameworks 6, Kirigami, Kirigami Addons and the
 CMake toolchain. On Arch/CachyOS:
 
 ```sh
-sudo pacman -S --needed cmake extra-cmake-modules base-devel \
-    qt6-base qt6-declarative kirigami kirigami-addons \
+sudo pacman -S --needed cmake ninja extra-cmake-modules base-devel \
+    qt6-base qt6-declarative vulkan-headers kirigami kirigami-addons \
     ki18n kcoreaddons kiconthemes kcrash kitemmodels \
     kcolorscheme qqc2-desktop-style
 ```
@@ -109,11 +109,14 @@ sudo pacman -S --needed cmake extra-cmake-modules base-devel \
 Then:
 
 ```sh
-cmake -B build -G Ninja
+cmake -B build
 cmake --build build
 ./build/bin/kareer
 ```
 
+(If you have `ninja` installed, add `-G Ninja` to the configure step or
+use the `ninja-dev` preset: `cmake --preset ninja-dev`.)
+
 Run the tests with `ctest --test-dir build`.
 
 ## Architecture
@@ -136,4 +139,5 @@ Run the tests with `ctest --test-dir build`.
 - `appcolorscheme.{h,cpp}` - QML-facing wrapper around `KColorSchemeManager` for the Preferences page.
 - `qml/` - Kirigami UI: `ApplicationsPage` (list + search),
   `ApplicationEditPage` (add/edit/delete form), `DashboardPage`
-  (stat cards + pipeline), `SankeyDiagram` (the renderer).
+  (stat cards + pipeline), `SankeyDiagram` (the renderer),
+  `SettingsPage` (the Preferences page).