feat(case-ui): merge /compose editor into case tabs (X17 #3)

Folds the standalone /compose decision-editor route into the main case page so
there is no more "sub-page" (mockup 18f), with the final 6-tab workflow order:
סקירה · טיעונים ועמדות · אימות פסיקה · ההחלטה · טיוטות והערות · סוכנים.

- New PositionsPanel — the chair's editing surface (threshold claims + issues
  SubsectionCards + ChairEditor + background prose + case precedents + finish
  rail), extracted verbatim from the former /compose "עמדות וטענות" tab. Drops
  only the doc-strip (the overview DocumentsPanel is the sole owner — no dup).
- "טיעונים ועמדות" tab = PositionsPanel above + the aggregated by-party
  LegalArgumentsPanel in a collapsible below.
- "אימות פסיקה" promoted to its own top-level tab (CitationVerificationPanel,
  was /compose tab 3); placed BEFORE "ההחלטה" — verify citations, then write
  (INV-AH: the writer cites only verified precedents).
- "ההחלטה" stays the single 12-block editor (DecisionBlocksPanel) — no longer
  duplicated between /compose and the case page.
- Tabs are now controlled; the "פתח עורך החלטה" CTA switches to the ההחלטה tab
  instead of navigating to the deleted route.
- /compose route deleted; header-context /compose special-case removed.

No duplication remains (G2): blocks editor single, docs single (overview),
citation-verify single. Design-gate: mockup 18f approved in Claude Design X17.
tsc --noEmit + eslint clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web-ui/src/components/cases/positions-panel.tsx

@@ -0,0 +1,351 @@
+"use client";
+
+import { useRef, useState } from "react";
+import { Card, CardContent } from "@/components/ui/card";
+import { Button } from "@/components/ui/button";
+import { Skeleton } from "@/components/ui/skeleton";
+import { SubsectionCard } from "@/components/compose/subsection-card";
+import { PrecedentsSection } from "@/components/compose/precedents-section";
+import { Markdown } from "@/components/ui/markdown";
+import { useCase } from "@/lib/api/cases";
+import {
+  useCaseLearningStatus,
+  type CaseLearningStatus,
+} from "@/lib/api/learning";
+import { useResearchAnalysis } from "@/lib/api/research";
+import { useCasePrecedents } from "@/lib/api/precedents";
+
+/*
+ * PositionsPanel — the chair's editing surface for the analyst's threshold
+ * claims + issues (chair positions feed block י). Extracted verbatim from the
+ * former /compose "עמדות וטענות" tab when the decision editor was merged into
+ * the main case page (X17 #3). Lives inside the "טיעונים ועמדות" tab above the
+ * collapsible by-party aggregated arguments. The 12-block editor + citation
+ * verification moved to their own top-level tabs; /compose was deleted.
+ */
+
+// ── Staged-pipeline indicator text — derived from the live learning-status,
+// same source as the drafts-panel LearningStatusBadges. ──────────────────────
+function voiceLearningText(s?: CaseLearningStatus): string {
+  if (!s?.final_uploaded) return "ממתין להעלאת הסופי";
+  const v = s.voice_learning;
+  if (v.outcome === "succeeded") {
+    const bits = [`${v.lessons_count} לקחים הופקו`];
+    if (v.lessons_proposed > 0) bits.push(`${v.lessons_proposed} הוצעו לאישור`);
+    return `✓ הושלם · ${bits.join(" · ")}`;
+  }
+  if (v.outcome === "failed") return v.error ? `✗ נכשל — ${v.error}` : "✗ נכשל";
+  return "ממתין להרצה";
+}
+
+function halachaExtractionText(s?: CaseLearningStatus): string {
+  if (!s?.final_uploaded) return "ממתין להעלאת הסופי";
+  const h = s.halacha_extraction;
+  if (!h.enrolled_in_corpus)
+    return h.not_enrolled_reason ?? "לא נכנס לקורפוס-הפסיקה";
+  switch (h.status) {
+    case "completed":
+      return `✓ הושלם · חולצו ${h.halachot_count} · ${h.approved} אושרו · ${h.rejected} נדחו`;
+    case "processing":
+      return "רץ עכשיו…";
+    case "pending":
+    case "busy":
+      return "בתור";
+    case "partial":
+      return `חלקי · חולצו ${h.halachot_count}`;
+    case "failed":
+    case "extraction_failed":
+      return "✗ נכשל";
+    case "no_chunks":
+      return "אין טקסט לחילוץ";
+    default:
+      return "ממתין להרצה";
+  }
+}
+
+function ProseSection({ title, content }: { title: string; content?: string }) {
+  if (!content?.trim()) return null;
+  return (
+    <section className="space-y-2">
+      <h3 className="text-[0.78rem] uppercase tracking-[0.08em] text-gold-deep font-semibold">
+        {title}
+      </h3>
+      <Markdown content={content.trim()} />
+    </section>
+  );
+}
+
+// ── "השלמה והעברה" rail card — DOCX export, analysis upload/download (real) ──
+function FinishRail({
+  caseNumber,
+  hasAnalysis,
+  onUploaded,
+}: {
+  caseNumber: string;
+  hasAnalysis: boolean;
+  onUploaded: () => void;
+}) {
+  const fileRef = useRef<HTMLInputElement>(null);
+  const [uploading, setUploading] = useState(false);
+  const [uploadMsg, setUploadMsg] = useState<{ ok: boolean; text: string } | null>(null);
+  const learning = useCaseLearningStatus(caseNumber);
+
+  async function handleUpload(file: File) {
+    setUploading(true);
+    setUploadMsg(null);
+    try {
+      const form = new FormData();
+      form.append("file", file);
+      const res = await fetch(`/api/cases/${caseNumber}/research/analysis/upload`, {
+        method: "PUT",
+        body: form,
+      });
+      const data = await res.json();
+      if (!res.ok) {
+        setUploadMsg({ ok: false, text: data.detail || "שגיאה בהעלאה" });
+        return;
+      }
+      setUploadMsg({
+        ok: true,
+        text: `הקובץ הועלה — ${data.sections.threshold_claims} טענות סף, ${data.sections.issues} סוגיות`,
+      });
+      onUploaded();
+    } catch {
+      setUploadMsg({ ok: false, text: "שגיאת רשת" });
+    } finally {
+      setUploading(false);
+      if (fileRef.current) fileRef.current.value = "";
+    }
+  }
+
+  return (
+    <Card className="bg-surface border-rule shadow-sm">
+      <CardContent className="px-4 py-4">
+        <h3 className="text-navy text-[0.9rem] font-semibold mb-3">השלמה והעברה</h3>
+
+        <input
+          ref={fileRef}
+          type="file"
+          accept=".md"
+          className="hidden"
+          onChange={(e) => {
+            const f = e.target.files?.[0];
+            if (f) handleUpload(f);
+          }}
+        />
+
+        <div className="space-y-2">
+          {hasAnalysis && (
+            <Button
+              variant="outline"
+              className="w-full justify-center"
+              onClick={() => {
+                const a = document.createElement("a");
+                a.href = `/api/cases/${caseNumber}/research/analysis/export-docx`;
+                a.click();
+              }}
+            >
+              ייצוא DOCX
+            </Button>
+          )}
+          <Button
+            className="w-full justify-center bg-gold text-white hover:bg-gold-deep"
+            disabled={uploading}
+            onClick={() => fileRef.current?.click()}
+          >
+            {uploading ? "מעלה…" : "העלאת ניתוח מעודכן"}
+          </Button>
+          {hasAnalysis && (
+            <Button
+              variant="outline"
+              className="w-full justify-center"
+              onClick={() => {
+                const a = document.createElement("a");
+                a.href = `/api/cases/${caseNumber}/research/analysis/download`;
+                a.download = `analysis-${caseNumber}.md`;
+                a.click();
+              }}
+            >
+              הורד ניתוח (MD)
+            </Button>
+          )}
+        </div>
+
+        {uploadMsg && (
+          <p className={`text-xs mt-2 ${uploadMsg.ok ? "text-success" : "text-danger"}`}>
+            {uploadMsg.text}
+          </p>
+        )}
+
+        {/* stage indicators — informational pointers, not actions */}
+        <div className="mt-3 space-y-0">
+          <div className="text-[0.78rem] text-ink-muted pt-2 border-t border-rule-soft">
+            <b className="text-navy">הרץ למידת-קול</b> — {voiceLearningText(learning.data)}
+          </div>
+          <div className="text-[0.78rem] text-ink-muted pt-2 mt-2 border-t border-rule-soft">
+            <b className="text-navy">הרץ אימות-הלכות</b> — {halachaExtractionText(learning.data)}
+          </div>
+        </div>
+      </CardContent>
+    </Card>
+  );
+}
+
+export function PositionsPanel({ caseNumber }: { caseNumber: string }) {
+  const caseQuery = useCase(caseNumber);
+  const analysis = useResearchAnalysis(caseNumber);
+  const precedentsQuery = useCasePrecedents(caseNumber);
+
+  const allPrecedents = precedentsQuery.data ?? [];
+  const caseLevelPrecedents = allPrecedents.filter((p) => p.section_id === null);
+  const precedentsBySection = new Map<string, typeof allPrecedents>();
+  for (const p of allPrecedents) {
+    if (p.section_id) {
+      const existing = precedentsBySection.get(p.section_id) ?? [];
+      existing.push(p);
+      precedentsBySection.set(p.section_id, existing);
+    }
+  }
+  const practiceArea = caseQuery.data?.practice_area ?? null;
+
+  const isNotFound =
+    analysis.error instanceof Error &&
+    /404|לא נמצא|טרם בוצע/.test(analysis.error.message);
+
+  return (
+    <div className="space-y-4">
+      <p className="text-ink-muted text-[0.78rem]">
+        סוגיות-המחלוקת ועמדות הצדדים. עורך עמדת-היו״ר נשמר אוטומטית ומזין את בלוק י׳ (דיון והכרעה).
+      </p>
+
+      {analysis.isPending ? (
+        <Card className="bg-surface border-rule shadow-sm">
+          <CardContent className="px-6 py-5 space-y-3">
+            <Skeleton className="h-6 w-48" />
+            <Skeleton className="h-4 w-96" />
+            <Skeleton className="h-32 w-full" />
+          </CardContent>
+        </Card>
+      ) : isNotFound ? (
+        <Card className="bg-surface border-rule shadow-sm">
+          <CardContent className="px-6 py-12 text-center space-y-3">
+            <div className="text-gold text-3xl" aria-hidden>❦</div>
+            <h2 className="text-navy text-lg mb-0">
+              טרם בוצע ניתוח משפטי לתיק זה
+            </h2>
+            <p className="text-ink-muted text-sm max-w-md mx-auto">
+              לאחר שקובץ <code>analysis-and-research.md</code> ייווצר, תוכלי
+              לערוך כאן את עמדת הוועדה לכל טענת סף וסוגיה.
+            </p>
+          </CardContent>
+        </Card>
+      ) : analysis.error ? (
+        <Card className="bg-danger-bg border-danger/40">
+          <CardContent className="px-6 py-5 text-center">
+            <p className="text-danger">{analysis.error.message}</p>
+          </CardContent>
+        </Card>
+      ) : analysis.data ? (
+        <div className="space-y-6">
+          {analysis.data.threshold_claims &&
+            analysis.data.threshold_claims.length > 0 && (
+              <div className="space-y-3">
+                <div className="flex items-center gap-2">
+                  <h2 className="text-navy text-lg font-semibold mb-0">טענות סף</h2>
+                  <span className="text-[0.72rem] rounded-full bg-gold-wash text-gold-deep px-2 py-0.5 border border-gold/40 tabular-nums">
+                    {analysis.data.threshold_claims.length}
+                  </span>
+                </div>
+                <div className="grid gap-3 lg:grid-cols-2 items-start">
+                  {analysis.data.threshold_claims.map((tc) => (
+                    <SubsectionCard
+                      key={tc.id}
+                      caseNumber={caseNumber}
+                      item={tc}
+                      precedents={precedentsBySection.get(tc.id) ?? []}
+                      practiceArea={practiceArea}
+                    />
+                  ))}
+                </div>
+              </div>
+            )}
+
+          {analysis.data.issues && analysis.data.issues.length > 0 && (
+            <div className="space-y-3">
+              <div className="flex items-center gap-2">
+                <h2 className="text-navy text-lg font-semibold mb-0">סוגיות להכרעה</h2>
+                <span className="text-[0.72rem] rounded-full bg-gold-wash text-gold-deep px-2 py-0.5 border border-gold/40 tabular-nums">
+                  {analysis.data.issues.length}
+                </span>
+              </div>
+              <div className="grid gap-3 lg:grid-cols-2 items-start">
+                {analysis.data.issues.map((iss) => (
+                  <SubsectionCard
+                    key={iss.id}
+                    caseNumber={caseNumber}
+                    item={iss}
+                    precedents={precedentsBySection.get(iss.id) ?? []}
+                    practiceArea={practiceArea}
+                  />
+                ))}
+              </div>
+            </div>
+          )}
+
+          {!analysis.data.threshold_claims?.length &&
+            !analysis.data.issues?.length && (
+              <Card className="bg-surface border-rule">
+                <CardContent className="px-6 py-10 text-center text-ink-muted">
+                  לא נמצאו טענות סף או סוגיות בניתוח זה.
+                </CardContent>
+              </Card>
+            )}
+
+          <Card className="bg-surface border-rule shadow-sm">
+            <CardContent className="px-6 py-5 space-y-5">
+              <h2 className="text-navy text-lg font-semibold mb-0">רקע לניתוח</h2>
+              <ProseSection title="צד מיוצג" content={analysis.data.represented_party} />
+              <ProseSection title="רקע דיוני" content={analysis.data.procedural_background} />
+              <ProseSection title="עובדות מוסכמות" content={analysis.data.agreed_facts} />
+              <ProseSection title="עובדות במחלוקת" content={analysis.data.disputed_facts} />
+            </CardContent>
+          </Card>
+
+          {analysis.data.conclusions?.trim() && (
+            <Card className="bg-gold-wash border-gold/40 shadow-sm">
+              <CardContent className="px-6 py-5 space-y-3">
+                <h2 className="text-gold-deep text-lg font-semibold mb-0">מסקנות</h2>
+                <Markdown content={analysis.data.conclusions.trim()} />
+              </CardContent>
+            </Card>
+          )}
+        </div>
+      ) : null}
+
+      {/* case-level פסיקה מצורפת + finish/export gates (INV-IA3: not removed) */}
+      <div className="grid gap-4 lg:grid-cols-2 items-start pt-2">
+        <Card className="bg-surface border-rule shadow-sm">
+          <CardContent className="px-5 py-4">
+            <h3 className="text-navy text-[0.9rem] font-semibold mb-1">פסיקה מצורפת</h3>
+            <p className="text-[0.72rem] text-ink-muted mb-3">
+              ציטוטים התומכים בעמדה באופן רוחבי — ישולבו בפתיחת בלוק י (דיון).
+            </p>
+            <PrecedentsSection
+              caseNumber={caseNumber}
+              sectionId={null}
+              precedents={caseLevelPrecedents}
+              practiceArea={practiceArea}
+              emptyHelperText="עדיין לא צורפה פסיקה כללית לתיק"
+            />
+          </CardContent>
+        </Card>
+
+        <FinishRail
+          caseNumber={caseNumber}
+          hasAnalysis={!!analysis.data}
+          onUploaded={() => analysis.refetch()}
+        />
+      </div>
+    </div>
+  );
+}