The home page hero search showed a static "Search the web or ELY"
placeholder regardless of what the user had typed in the omnibar.
Click the home search → focus the omnibar → start typing → omnibar
shows the text but the home search still says "Search the web or
ELY". The user reasonably reads that as "my typing went nowhere."
Read `command_input.value()` from the home search renderer and echo
it (in INK when set, INK_4 placeholder when empty). Single Input
still owns the actual state — the home search is a click-to-focus
shortcut, this is a read-only echo so the user sees their typing
reflected here too. Truncate so long URLs don't blow the row.
Plumb `&ElyShell` through `render_home_page → render_hero →
render_search_bar`.
ZacharyZhang-NY
2852ab63ee