Implements the Claude-Design-approved inline status banners for the
"חשב טיעונים" panel (mockup 25-legal-arguments-panel): the four endpoint
states (queued / exists / no_claims / skipped) now render as tone-coded
banners below the header instead of a transient toast. Toast is kept only
for hard transport errors.
Also fixes a pre-existing double-card bug found while reviewing the page:
the page's "arguments" tab already wraps the panel in <Card><CardContent>
(page.tsx:151-155), yet LegalArgumentsPanel rendered its OWN <Card> too —
unlike its sibling tab panels (DecisionBlocksPanel/DraftsPanel/
AgentActivityFeed) which render a plain <div>. The panel now matches that
convention (single card, no double border/padding), consistent with the
approved single-card mockup.
Design gate: card 25 approved by חיים. tsc + eslint clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
