feat(fe): add Member Intelligence (/users) page wired to full reputation data

- New /users route: member roster (trust score, clean/flagged counts, message volume)
  + inspector detail (trust breakdown, clean streak, infractions, AI profile,
  recent messages) with live search
- Backend dashboard.listUsers/getUserDetail now JOIN user_reputations to expose
  trust_score, clean_message_streak, total_infractions, last_infraction_at +
  warn_count/clean_count breakdowns
- Frontend types updated to match; useUsers refactored to PaginatedUsers shape,
  added useUserSearch for the old search behavior
- Nav rail + mobile nav: add Users entry

services/backend/src/modules/dashboard/dashboard.repository.ts

@@ -5,6 +5,7 @@ import {
   pgChannelCulturesTable,
   pgMessagesTable,
   pgUserProfilesTable,
+  pgUserReputationsTable,
   pgVoiceRecordingsTable,
 } from "../../shared/index.js";
 import type { ListUsersQuery } from "./dashboard.service.js";
@@ -153,8 +154,14 @@ export class DashboardRepository {
         m.username,
         m.avatar_url,
         p.profile_summary,
+        r.trust_score,
+        r.clean_message_streak,
+        r.total_infractions,
+        r.last_infraction_at,
         m.total_messages,
         m.flagged_count,
+        m.clean_count,
+        m.warn_count,
         m.last_message_at
       FROM (
         SELECT
@@ -163,11 +170,14 @@ export class DashboardRepository {
           avatar_url,
           COUNT(*)::int AS total_messages,
           COUNT(*) FILTER (WHERE ai_status = 'flagged')::int AS flagged_count,
+          COUNT(*) FILTER (WHERE ai_status = 'clean')::int AS clean_count,
+          COUNT(*) FILTER (WHERE ai_status = 'warn')::int AS warn_count,
           MAX(created_at) AS last_message_at
         FROM ${pgMessagesTable}
         GROUP BY user_id, username, avatar_url
       ) m
       LEFT JOIN ${pgUserProfilesTable} p ON p.user_id = m.user_id
+      LEFT JOIN ${pgUserReputationsTable} r ON r.user_id = m.user_id
       ${whereClause}
       ORDER BY m.last_message_at DESC NULLS LAST
       LIMIT ${limit + 1}
@@ -180,8 +190,20 @@ export class DashboardRepository {
         username: r.username as string | null,
         avatar_url: r.avatar_url as string | null,
         profile_summary: r.profile_summary as string | null,
+        trust_score: r.trust_score != null ? Number(r.trust_score) : null,
+        clean_message_streak:
+          r.clean_message_streak != null
+            ? Number(r.clean_message_streak)
+            : null,
+        total_infractions:
+          r.total_infractions != null ? Number(r.total_infractions) : null,
+        last_infraction_at: r.last_infraction_at
+          ? Number(r.last_infraction_at)
+          : null,
         total_messages: Number(r.total_messages),
         flagged_count: Number(r.flagged_count),
+        clean_count: Number(r.clean_count),
+        warn_count: Number(r.warn_count),
         last_message_at: r.last_message_at ? Number(r.last_message_at) : null,
       }));
 
@@ -429,8 +451,13 @@ export class DashboardRepository {
         m.total_messages,
         m.flagged_count,
         m.clean_count,
+        m.warn_count,
         p.profile_summary,
-        p.last_analyzed_at
+        p.last_analyzed_at,
+        r.trust_score,
+        r.clean_message_streak,
+        r.total_infractions,
+        r.last_infraction_at
       FROM (
         SELECT
           user_id,
@@ -438,12 +465,14 @@ export class DashboardRepository {
           avatar_url,
           COUNT(*)::int AS total_messages,
           COUNT(*) FILTER (WHERE ai_status = 'flagged')::int AS flagged_count,
-          COUNT(*) FILTER (WHERE ai_status = 'clean')::int AS clean_count
+          COUNT(*) FILTER (WHERE ai_status = 'clean')::int AS clean_count,
+          COUNT(*) FILTER (WHERE ai_status = 'warn')::int AS warn_count
         FROM ${pgMessagesTable}
         WHERE user_id = ${userId}
         GROUP BY user_id, username, avatar_url
       ) m
       LEFT JOIN ${pgUserProfilesTable} p ON p.user_id = m.user_id
+      LEFT JOIN ${pgUserReputationsTable} r ON r.user_id = m.user_id
     `);
 
     const row = userResult.rows[0] as Record<string, unknown> | undefined;
@@ -466,10 +495,21 @@ export class DashboardRepository {
       total_messages: Number(row.total_messages),
       flagged_count: Number(row.flagged_count),
       clean_count: Number(row.clean_count),
+      warn_count: Number(row.warn_count),
       profile_summary: row.profile_summary as string | null,
       last_analyzed_at: row.last_analyzed_at
         ? Number(row.last_analyzed_at)
         : null,
+      trust_score: row.trust_score != null ? Number(row.trust_score) : null,
+      clean_message_streak:
+        row.clean_message_streak != null
+          ? Number(row.clean_message_streak)
+          : null,
+      total_infractions:
+        row.total_infractions != null ? Number(row.total_infractions) : null,
+      last_infraction_at: row.last_infraction_at
+        ? Number(row.last_infraction_at)
+        : null,
       recent_messages: (recent.rows as Record<string, unknown>[]).map((r) => ({
         id: String(r.id),
         content: String(r.content),