Align repo config with global development standards

- Add missing tsconfig strictness flags (noUncheckedIndexedAccess,
  exactOptionalPropertyTypes, noImplicitOverride,
  noPropertyAccessFromIndexSignature) and fix all resulting type errors
- Replace ESLint/Prettier with oxlint 1.48.0 and oxfmt 0.33.0
- Pin all frontend and backend dependencies to exact versions
- Pin GitHub Actions to SHA hashes with persist-credentials: false
- Fix CI Python version mismatch (3.12 -> 3.14) and ruff target-version
- Add vitest 4.0.18 with jsdom environment for frontend testing
- Add ty 0.0.17 for Python type checking (non-blocking in CI)
- Add actionlint and zizmor CI job for workflow linting and security audit
- Add Dependabot config for npm, pip, and github-actions
- Update CLAUDE.md and pre-commit hooks to reflect new tooling
- Ignore Claude Code sandbox artifacts in gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/admin/AdminTable.tsx

@@ -79,10 +79,7 @@ export function AdminTable<T>({
             {Array.from({ length: 5 }).map((_, i) => (
               <tr key={i}>
                 {columns.map((col) => (
-                  <td
-                    key={col.header}
-                    className={`px-4 py-3 ${col.className ?? ''}`}
-                  >
+                  <td key={col.header} className={`px-4 py-3 ${col.className ?? ''}`}>
                     <div className="h-4 bg-gray-200 dark:bg-gray-700 rounded animate-pulse" />
                   </td>
                 ))}
@@ -114,9 +111,7 @@ export function AdminTable<T>({
                 return (
                   <th
                     key={col.header}
-                    onClick={
-                      sortable ? () => handleSort(col.header) : undefined
-                    }
+                    onClick={sortable ? () => handleSort(col.header) : undefined}
                     className={`px-4 py-3 text-left text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wider ${col.className ?? ''} ${sortable ? 'cursor-pointer select-none hover:text-gray-700 dark:hover:text-gray-200' : ''}`}
                   >
                     <span className="inline-flex items-center gap-1">
@@ -138,9 +133,7 @@ export function AdminTable<T>({
                 key={keyFn(row)}
                 onClick={onRowClick ? () => onRowClick(row) : undefined}
                 className={
-                  onRowClick
-                    ? 'cursor-pointer hover:bg-gray-50 dark:hover:bg-gray-800'
-                    : ''
+                  onRowClick ? 'cursor-pointer hover:bg-gray-50 dark:hover:bg-gray-800' : ''
                 }
               >
                 {columns.map((col) => (