fix(rows): keep episode rows exactly 3 lines — truncate, don't wrap

Feed and My Shows rows could grow to 4+ lines when a long title was
shrunk by the current pane: flexible text wrapped instead of
truncating, shifting every row below while scrolling. Add
wrapMode=none + truncate to flexible text and flexShrink=0 to
fixed-width cells so rows stay one line tall. Feed rows also move
the podcast name onto its own line. Adds a rendered-layout
regression test at 70 columns (35-col current pane).

src/pages/MyShows/MyShowsPage.tsx

@@ -362,26 +362,41 @@ export function MyShowsPage() {
 									}}
 								>
 									<box flexDirection="row" gap={1}>
-										<text fg={focusFg(index(), lf(), isActive())}>
+										<text
+											flexShrink={0}
+											fg={focusFg(index(), lf(), isActive())}
+										>
 											{index() === lf() ? marker() : " "}
 										</text>
-										<text fg={focusFg(index(), lf(), isActive())}>
+										<text
+											wrapMode="none"
+											truncate
+											fg={focusFg(index(), lf(), isActive())}
+										>
 											{ep.episodeNumber ? `#${ep.episodeNumber} ` : ""}
 											{ep.title}
 										</text>
 									</box>
 									<box flexDirection="row" gap={2} paddingLeft={2}>
-										<text fg={index() === lf() ? theme.surface : theme.info}>
+										<text
+											flexShrink={0}
+											fg={index() === lf() ? theme.surface : theme.info}
+										>
 											{formatDate(ep.pubDate)}
 										</text>
-										<text fg={index() === lf() ? theme.surface : muted()}>
+										<text
+											flexShrink={0}
+											fg={index() === lf() ? theme.surface : muted()}
+										>
 											{formatDuration(ep.duration)}
 										</text>
 										<Show when={nav.isSelected(ep.id)}>
-											<text fg={theme.warning}>●</text>
+											<text flexShrink={0} fg={theme.warning}>
+												●
+											</text>
 										</Show>
 										<Show when={downloadLabel(ep.id)}>
-											<text fg={downloadColor(ep.id)}>
+											<text flexShrink={0} fg={downloadColor(ep.id)}>
 												{downloadLabel(ep.id)}
 											</text>
 										</Show>