Changelog

Use proper ColumnDefinition with pixel width (340, min 280, max 600)

instead of Auto column with Border.Width — GridSplitter cannot resize

Auto columns. Add hover styling and resize cursor to the splitter for

a visible drag handle.

The flyout was being populated via a Button.Click handler, but the

MenuFlyout renders before Click fires. Switch to the flyout's

Opening event so items are populated before the flyout is displayed.

• Article list panel now resizable via GridSplitter (min 280, default

340, max 600) instead of fixed ThemeDetailPanelWidth

• List items use Grid for star+title layout so TextTrimming works

correctly (ellipsis instead of overflow), increased item margin

• Feed selector dropdown now shows all default categories (Tech,

News, Business, Science, Design) as bold headers, with feeds

indented under their category, and Uncategorized feeds at bottom

• Each feed in the dropdown has a right-click context menu for

Rename Feed, Set Category, and Remove Feed

• Category headers are clickable to filter by that category

Remove the sidebar entirely — feeds are now selected via a dropdown

button in the toolbar. The dropdown shows "All Feeds" at the top,

then each category as a bold header (clicking selects all feeds in

that category), with individual feeds indented underneath.

• Add SelectedCategory property for category-based filtering
• Add SelectCategoryCommand and FeedSelectorLabel computed property
• Category filtering is client-side (filters loaded articles by

feed IDs belonging to the selected category)

• Feed selector button shows current selection label with caret
• Focus mode star also updated from emoji to PathIcon glyph

• Move filter buttons (All, Unread, Starred, Today, Last 7 Days) from

sidebar to article toolbar as compact pill buttons with counts

• Sidebar now only shows feeds list (cleaner layout)
• Replace star emoji (★) with PathIcon glyph star throughout:
• Detail view: 20px glyph star button (gold when starred, gray when not)
• List view: 12px gold star to the left of the title when starred
• Remove redundant star emoji from article list date row
• Add filter-pill styles (rounded border, selected state highlight)