feat(arguments): inline status banners + fix double-card nesting

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>

web-ui/src/components/cases/legal-arguments-panel.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useMemo } from "react";
+import { useMemo, type ReactNode } from "react";
 import {
   Accordion,
   AccordionContent,
@@ -9,7 +9,6 @@ import {
 } from "@/components/ui/accordion";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
-import { Card, CardContent } from "@/components/ui/card";
 import {
   Popover,
   PopoverContent,
@@ -22,6 +21,7 @@ import {
   PRIORITY_ORDER,
   useAggregateArguments,
   useLegalArguments,
+  type AggregateArgumentsResult,
   type LegalArgument,
   type LegalArgumentParty,
   type LegalArgumentPriority,
@@ -189,97 +189,167 @@ export function LegalArgumentsPanel({ caseNumber }: LegalArgumentsPanelProps) {
   }, [data]);
 
   const handleAggregate = (force: boolean) => {
+    // Status feedback is rendered inline as a banner from `aggregate.data`;
+    // only hard transport/HTTP errors fall through to a toast.
     aggregate.mutate(force, {
-      onSuccess: (result) => {
-        switch (result.status) {
-          case "queued":
-            toast.success(
-              force
-                ? "נשלח לאנליטיקאי לחישוב מחדש. התוצאה תופיע תוך כמה דקות — רענן את הדף."
-                : "נשלח לאנליטיקאי. החישוב רץ ברקע; התוצאה תופיע תוך כמה דקות — רענן את הדף.",
-            );
-            break;
-          case "no_claims":
-          case "exists":
-            toast.info(result.message);
-            break;
-          case "skipped":
-            toast.warning(
-              `לא ניתן להפעיל אוטומטית (${result.reason}). הרץ ידנית מ-Claude Code: mcp__legal-ai__aggregate_claims_to_arguments`,
-            );
-            break;
-          default:
-            toast.success("הבקשה נשלחה.");
-        }
-      },
       onError: (e) => toast.error(`שגיאה: ${(e as Error).message}`),
     });
   };
 
   return (
-    <Card className="bg-surface border-rule shadow-sm">
-      <CardContent className="px-6 py-5 space-y-4">
-        <div className="flex items-center justify-between flex-wrap gap-3">
-          <div>
-            <h2 className="text-navy text-base font-semibold">
-              טיעונים משפטיים
-            </h2>
-            <p className="text-ink-muted text-xs mt-0.5">
-              טיעונים מאוגדים מתוך הפרופוזיציות הגולמיות, מקובצים לפי צד וקדימות.
-            </p>
-          </div>
-          <div className="flex items-center gap-2">
-            <Button
-              variant="outline"
-              size="sm"
-              disabled={aggregate.isPending}
-              onClick={() => handleAggregate(false)}
-            >
-              {aggregate.isPending ? (
-                <Loader2 className="w-3.5 h-3.5 animate-spin me-1.5" />
-              ) : (
-                <Sparkles className="w-3.5 h-3.5 me-1.5" />
-              )}
-              חשב טיעונים
-            </Button>
-            <Button
-              variant="ghost"
-              size="sm"
-              disabled={aggregate.isPending || !data?.total}
-              onClick={() => handleAggregate(true)}
-              title="חישוב מחדש (מוחק טיעונים קיימים)"
-            >
-              <RefreshCw className="w-3.5 h-3.5" />
-            </Button>
-          </div>
+    <div className="space-y-4">
+      <div className="flex items-center justify-between flex-wrap gap-3">
+        <div>
+          <h2 className="text-navy text-base font-semibold">טיעונים משפטיים</h2>
+          <p className="text-ink-muted text-xs mt-0.5">
+            טיעונים מאוגדים מתוך הטענות הגולמיות, מקובצים לפי צד וקדימות. החישוב
+            רץ אצל המנתח המשפטי ומדווח בחזרה.
+          </p>
         </div>
+        <div className="flex items-center gap-2">
+          <Button
+            variant="outline"
+            size="sm"
+            disabled={aggregate.isPending}
+            onClick={() => handleAggregate(false)}
+          >
+            {aggregate.isPending ? (
+              <Loader2 className="w-3.5 h-3.5 animate-spin me-1.5" />
+            ) : (
+              <Sparkles className="w-3.5 h-3.5 me-1.5" />
+            )}
+            חשב טיעונים
+          </Button>
+          <Button
+            variant="ghost"
+            size="sm"
+            disabled={aggregate.isPending || !data?.total}
+            onClick={() => handleAggregate(true)}
+            title="חישוב מחדש (מוחק טיעונים קיימים)"
+          >
+            <RefreshCw className="w-3.5 h-3.5" />
+          </Button>
+        </div>
+      </div>
 
-        {isPending ? (
-          <div className="space-y-2">
-            <Skeleton className="h-6 w-48" />
-            <Skeleton className="h-20 w-full" />
-            <Skeleton className="h-20 w-full" />
-          </div>
-        ) : isError ? (
-          <p className="text-danger text-sm">
-            שגיאה בטעינת טיעונים: {(error as Error).message}
-          </p>
-        ) : !data?.total ? (
-          <p className="text-ink-muted text-sm">
-            אין טיעונים מאוגדים עדיין. לחץ &ldquo;חשב טיעונים&rdquo; כדי להריץ את ה-aggregator.
-          </p>
-        ) : (
-          <div className="space-y-6">
-            {parties.map((party) => (
-              <PartySection
-                key={party}
-                party={party}
-                args={data.by_party[party] ?? []}
-              />
-            ))}
-          </div>
-        )}
-      </CardContent>
-    </Card>
+      <AggregateStatusBanner
+        result={aggregate.data}
+        force={aggregate.variables ?? false}
+      />
+
+      {isPending ? (
+        <div className="space-y-2">
+          <Skeleton className="h-6 w-48" />
+          <Skeleton className="h-20 w-full" />
+          <Skeleton className="h-20 w-full" />
+        </div>
+      ) : isError ? (
+        <p className="text-danger text-sm">
+          שגיאה בטעינת טיעונים: {(error as Error).message}
+        </p>
+      ) : !data?.total ? (
+        <p className="text-ink-muted text-sm">
+          אין טיעונים מאוגדים עדיין. לחץ &ldquo;חשב טיעונים&rdquo; כדי לשלוח את
+          החישוב למנתח המשפטי.
+        </p>
+      ) : (
+        <div className="space-y-6">
+          {parties.map((party) => (
+            <PartySection
+              key={party}
+              party={party}
+              args={data.by_party[party] ?? []}
+            />
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
+
+const BANNER_TONE = {
+  info: "border-info/30 bg-info-bg",
+  gold: "border-gold/40 bg-gold-wash",
+  muted: "border-rule bg-rule-soft",
+  warn: "border-warn/40 bg-warn-bg",
+} as const;
+
+const DOT_TONE = {
+  info: "bg-info",
+  gold: "bg-gold-deep",
+  muted: "bg-ink-light",
+  warn: "bg-warn",
+} as const;
+
+const TITLE_TONE = {
+  info: "text-info",
+  gold: "text-gold-deep",
+  muted: "text-ink-soft",
+  warn: "text-warn",
+} as const;
+
+/**
+ * Inline status feedback for the aggregation trigger — mirrors the approved
+ * Claude Design mockup (25-legal-arguments-panel). Shown only after a click;
+ * the four states map to the endpoint's discriminated-union result.
+ */
+function AggregateStatusBanner({
+  result,
+  force,
+}: {
+  result: AggregateArgumentsResult | undefined;
+  force: boolean;
+}) {
+  if (!result) return null;
+
+  let tone: keyof typeof BANNER_TONE;
+  let title: string;
+  let body: ReactNode;
+
+  switch (result.status) {
+    case "queued":
+      tone = "info";
+      title = "נשלח לאנליטיקאי.";
+      body = `${force ? "החישוב-מחדש" : "החישוב"} רץ ברקע אצל המנתח המשפטי; התוצאה תופיע תוך כמה דקות — רענן את הדף.`;
+      break;
+    case "exists":
+      tone = "gold";
+      title = "כבר חושב.";
+      body = result.message;
+      break;
+    case "no_claims":
+      tone = "muted";
+      title = "אין טענות גולמיות.";
+      body = result.message;
+      break;
+    case "skipped":
+      tone = "warn";
+      title = "לא ניתן להפעיל אוטומטית";
+      body = (
+        <>
+          {` (${result.reason}). הרץ ידנית מ-Claude Code: `}
+          <code className="font-mono text-[0.72rem] bg-navy/5 rounded px-1.5 py-0.5 select-all">
+            mcp__legal-ai__aggregate_claims_to_arguments
+          </code>
+        </>
+      );
+      break;
+    default:
+      return null;
+  }
+
+  return (
+    <div
+      className={`flex items-start gap-2.5 rounded-md border px-3.5 py-2.5 text-[0.8rem] leading-relaxed text-ink-soft ${BANNER_TONE[tone]}`}
+    >
+      <span
+        className={`mt-1.5 size-2 flex-none rounded-full ${DOT_TONE[tone]}`}
+        aria-hidden
+      />
+      <p>
+        <strong className={`font-semibold ${TITLE_TONE[tone]}`}>{title}</strong>{" "}
+        {body}
+      </p>
+    </div>
   );
 }