fix(case-page): resolve full-page review findings (bugs + RTL + resilience)

Full code review of the case-detail page (14 components) surfaced these,
all fixed here:

Logic bugs
- case-edit-dialog: form.reset ran on the 5s useCase refetch while the dialog
  was open, clobbering in-progress edits. Now resets only on open→true.
- status-changer: `selected` never synced to async/external `currentStatus`
  (stale dropdown). Reworked to track currentStatus until an explicit pick;
  resets to tracking after save.
- decision-blocks-panel: `block.content`/`word_count` accessed without null
  guards (endpoint has no response model) → potential render crash. Coerced
  with `?? ""` / `?? 0`. `STATUS_LABELS[status]` now falls back to the raw
  status instead of rendering literal "undefined".
- document-type-editor: `await mutateAsync()` in async click handlers without
  try/catch → unhandled promise rejection. Wrapped (errors still surface via
  isError).

Resilience / hygiene
- page.tsx: a transient 5xx on the background poll flipped the WHOLE page to
  the error card and discarded loaded data. Now gated on `!data`, plus a
  "נסה שוב" retry.
- cases.ts useUpdateCase: invalidated casesKeys.all, which re-invalidated the
  detail it had just optimistically patched. Scoped to the list prefix.

RTL correctness (logical properties)
- agent-status-widget `mr-auto`→`ms-auto`; agent-activity-feed `mr-auto`→
  `me-auto`, icon `ml-1/ml-2`→`me-1/me-2`, required `*` `mr-1`→`ms-1`;
  document-type-editor list `pr-4`→`ps-4`.

Minors
- drafts-panel: `<a href>`→`next/link` (operations + citation links) for SPA
  nav. agent-activity-feed: issueMap memoized; comment Textarea aria-label.
  upload-sheet: `unknown` status no longer shown as green success (neutral
  icon + "רענן לאישור"). citations.ts: case_name typed `string | null`.

Design gate: visual-touching items (RTL gap side, retry button, neutral
upload icon) were chair-authorized via the reviewed-findings approval ("fix
all"); none alter an approved page layout — they are correctness fixes.
tsc clean; eslint clean (1 pre-existing form.watch warning, untouched line).

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

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

@@ -1,6 +1,7 @@
 "use client";
 
 import { useRef, useState } from "react";
+import Link from "next/link";
 import { useQueryClient } from "@tanstack/react-query";
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
@@ -344,9 +345,9 @@ export function DraftsPanel({
             </Button>
             <span className="text-[0.7rem] text-ink-muted">
               סטטוס הריצה — בדף{" "}
-              <a href="/operations" className="underline">
+              <Link href="/operations" className="underline">
                 התפעול
-              </a>
+              </Link>
             </span>
           </div>
         )}
@@ -628,7 +629,7 @@ function CitationsSection({ caseNumber }: { caseNumber: string }) {
 
       <div className="rounded-lg border border-rule overflow-hidden divide-y divide-rule">
         {data.linked.map((c) => (
-          <a
+          <Link
             key={`l-${c.citation}`}
             href={`/precedents/${c.cited_id}`}
             className="flex items-center gap-2 px-4 py-2.5 text-sm hover:bg-rule-soft/20"
@@ -641,7 +642,7 @@ function CitationsSection({ caseNumber }: { caseNumber: string }) {
             <Badge className="ms-auto bg-success-bg text-success border-success/40 text-[0.65rem] shrink-0">
               בספרייה
             </Badge>
-          </a>
+          </Link>
         ))}
         {data.missing.map((c) => (
           <div