feat: Add About and Favourites pages, update routing and context management

- Added new routes for About and Favourites pages.
- Implemented About page with version information and credits.
- Created Favourites page with a placeholder message for empty favourites.
- Refactored RegionConfig import paths for consistency.
- Introduced PageTitleContext to manage page titles dynamically.
- Updated various components to utilize the new context for setting page titles.
- Enhanced AppShell layout with a responsive Drawer for navigation.
- Added CSS styles for new components and pages.
- Integrated commit hash display in the About page for version tracking.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/frontend/app/components/layout/Header.css b/src/frontend/app/components/layout/Header.css
new file mode 100644
index 0000000..c95226f
--- /dev/null
+++ b/src/frontend/app/components/layout/Header.css
@@ -0,0 +1,41 @@
+.app-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0.5rem 1rem;
+  background-color: var(--background-color);
+  border-bottom: 1px solid var(--border-color);
+  height: 60px;
+  box-sizing: border-box;
+  width: 100%;
+}
+
+.app-header__left {
+  display: flex;
+  align-items: center;
+  gap: 1rem;
+}
+
+.app-header__menu-btn {
+  background: none;
+  border: none;
+  cursor: pointer;
+  color: var(--text-color);
+  padding: 0.5rem;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 50%;
+  transition: background-color 0.2s;
+}
+
+.app-header__menu-btn:hover {
+  background-color: rgba(0, 0, 0, 0.05);
+}
+
+.app-header__title {
+  font-size: 1.25rem;
+  font-weight: 600;
+  margin: 0;
+  color: var(--text-color);
+}