v1.5.6: boneyard-js skeleton migration, TanStack Query refactor, rate-limit config

- Replace hand-coded skeleton CSS/JSX with boneyard-js auto-generated bones
- Remove skeleton.css and @keyframes shimmer from base.css
- Add <Skeleton> wrappers with fixtures to all 25+ page components
- Generate 20 bone captures via boneyard CLI (CDP auth-gated capture)
- Refactor data fetching from useEffect+useState to TanStack Query
- Extract query hooks into src/admin/lib/queries/ and apiAdapter
- Add usePaginatedQuery hook replacing useApiCall/useListData
- Fix parseFloat || 0 anti-pattern in OfferDetail and OffersTemplates inputs
- Fix customer_id mandatory validation on offer creation
- Fix leave-requests comma-separated status filter (Prisma enum in: [])
- Add cross-entity cache invalidation for orders/offers/invoices/projects
- Make rate limits configurable via env vars (RATE_LIMIT_MAX, RATE_LIMIT_REFRESH, etc.)
- Add boneyard.config.json with routes and breakpoints

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/admin/fixtures/AttendanceBalancesFixture.tsx

@@ -0,0 +1,104 @@
+export default function AttendanceBalancesFixture() {
+  return (
+    <div>
+      <div className="admin-page-header">
+        <div>
+          <h1 className="admin-page-title">Správa bilancí</h1>
+        </div>
+        <div className="admin-page-actions">
+          <select className="admin-form-select" style={{ minWidth: 100 }}>
+            <option>2025</option>
+          </select>
+        </div>
+      </div>
+      <div className="admin-card">
+        <div className="admin-card-body">
+          <div className="admin-table-responsive">
+            <table className="admin-table">
+              <thead>
+                <tr>
+                  <th>Zaměstnanec</th>
+                  <th>Nárok (h)</th>
+                  <th>Čerpáno (h)</th>
+                  <th>Zbývá (h)</th>
+                  <th>Nemoc (h)</th>
+                  <th>Akce</th>
+                </tr>
+              </thead>
+              <tbody>
+                {Array.from({ length: 4 }, (_, i) => (
+                  <tr key={i}>
+                    <td className="fw-500">Jan Novák</td>
+                    <td className="admin-mono">160</td>
+                    <td className="admin-mono">40.0</td>
+                    <td className="admin-mono">120.0</td>
+                    <td className="admin-mono">8.0</td>
+                    <td>
+                      <div className="admin-table-actions">
+                        <button className="admin-btn-icon" title="Upravit">
+                          &#9998;
+                        </button>
+                      </div>
+                    </td>
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+        </div>
+      </div>
+      <div className="mt-6">
+        <h2 className="admin-page-title mb-4" style={{ fontSize: "1.25rem" }}>
+          Měsíční přehled fondu 2025
+        </h2>
+        <div className="admin-grid admin-grid-3">
+          {Array.from({ length: 3 }, (_, i) => (
+            <div key={i} className="admin-card">
+              <div className="admin-card-body">
+                <h3 style={{ fontWeight: 600, fontSize: "1rem", margin: 0 }}>
+                  Duben
+                </h3>
+                <div
+                  style={{
+                    display: "flex",
+                    flexDirection: "column",
+                    gap: "0.375rem",
+                    marginTop: "0.5rem",
+                  }}
+                >
+                  <div
+                    style={{
+                      display: "flex",
+                      justifyContent: "space-between",
+                      fontSize: 12,
+                    }}
+                  >
+                    <span>Jan Novák</span>
+                    <span className="text-secondary">8h</span>
+                  </div>
+                  <div
+                    style={{
+                      height: 3,
+                      background: "var(--bg-tertiary)",
+                      borderRadius: 2,
+                      overflow: "hidden",
+                    }}
+                  >
+                    <div
+                      style={{
+                        height: "100%",
+                        width: "75%",
+                        background: "var(--gradient)",
+                        borderRadius: 2,
+                      }}
+                    />
+                  </div>
+                </div>
+              </div>
+            </div>
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}