Add human-readable reshuffle details to audit log page

Audit log now renders JUROR_DROPOUT_RESHUFFLE and COI_REASSIGNMENT
entries as formatted tables with resolved juror names instead of raw
JSON with opaque IDs. Uses new user.resolveNames endpoint to batch-
lookup user IDs. Also adds missing action types to the filter dropdown.

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

src/server/routers/user.ts

@@ -360,6 +360,25 @@ export const userRouter = router({
       return user
     }),
 
+  /**
+   * Resolve a batch of user IDs to names (admin only).
+   * Returns a map of id → name for displaying in audit logs, etc.
+   */
+  resolveNames: adminProcedure
+    .input(z.object({ ids: z.array(z.string()).max(50) }))
+    .query(async ({ ctx, input }) => {
+      if (input.ids.length === 0) return {}
+      const users = await ctx.prisma.user.findMany({
+        where: { id: { in: input.ids } },
+        select: { id: true, name: true, email: true },
+      })
+      const map: Record<string, string> = {}
+      for (const u of users) {
+        map[u.id] = u.name || u.email
+      }
+      return map
+    }),
+
   /**
    * Create/invite a new user (admin only)
    */