diff --git a/src/App.vue b/src/App.vue
index 39fdb40..0afcdd9 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,50 +1,88 @@
 <script setup lang="ts">
-import { onMounted, ref, watch } from "vue"
-import type { DataSource, Member, Project } from "@/types"
-import { fetchMembers, fetchProjects } from "@/api"
+import { computed, onMounted, ref, watch } from "vue"
+import type { DataSource, Member, Project, SlackStatus } from "@/types"
+import { fetchMembers, fetchProjects, refreshSlackDirectory } from "@/api"
 import ProjectPicker from "@/components/ProjectPicker.vue"
-import MemberGrid from "@/components/MemberGrid.vue"
+import ProjectGroup from "@/components/ProjectGroup.vue"
+
+interface GroupState {
+  project: Project
+  members: Member[]
+  loading: boolean
+  error: string | null
+}
 
 const projects = ref<Project[]>([])
-const selectedProjectId = ref<string>("")
-const members = ref<Member[]>([])
+const selectedIds = ref<string[]>([])
+const groups = ref<GroupState[]>([])
 const source = ref<DataSource>("napta")
-
+const slackStatus = ref<SlackStatus | null>(null)
 const projectsError = ref<string | null>(null)
-const membersError = ref<string | null>(null)
-const loadingMembers = ref(false)
+const refreshing = ref(false)
+
+function errMsg(err: unknown): string {
+  return err instanceof Error ? err.message : String(err)
+}
+
+const projectById = computed(() => {
+  const m = new Map<string, Project>()
+  for (const p of projects.value) m.set(p.id, p)
+  return m
+})
 
 onMounted(async () => {
   try {
     const res = await fetchProjects()
     projects.value = res.projects
     source.value = res.source
-    if (res.projects.length > 0) {
-      selectedProjectId.value = res.projects[0].id
-    }
   } catch (err) {
-    projectsError.value = err instanceof Error ? err.message : String(err)
+    projectsError.value = errMsg(err)
   }
 })
 
-watch(selectedProjectId, async (id) => {
-  if (!id) {
-    members.value = []
-    return
-  }
-  loadingMembers.value = true
-  membersError.value = null
+// Reassign the array element by id so reactivity fires reliably.
+function setGroup(projectId: string, patch: Partial<GroupState>) {
+  const i = groups.value.findIndex((g) => g.project.id === projectId)
+  if (i >= 0) groups.value[i] = { ...groups.value[i], ...patch }
+}
+
+async function loadGroup(projectId: string) {
+  setGroup(projectId, { loading: true, error: null })
   try {
-    const res = await fetchMembers(id)
-    members.value = res.members
+    const res = await fetchMembers(projectId)
+    setGroup(projectId, { members: res.members, loading: false })
+    slackStatus.value = res.slack
     source.value = res.source
   } catch (err) {
-    membersError.value = err instanceof Error ? err.message : String(err)
-    members.value = []
-  } finally {
-    loadingMembers.value = false
+    setGroup(projectId, { members: [], error: errMsg(err), loading: false })
   }
+}
+
+// Reconcile the open Project Groups with the current Selection.
+watch(selectedIds, (ids) => {
+  groups.value = groups.value.filter((g) => ids.includes(g.project.id))
+  for (const id of ids) {
+    if (groups.value.some((g) => g.project.id === id)) continue
+    const project = projectById.value.get(id)
+    if (!project) continue
+    groups.value.push({ project, members: [], loading: true, error: null })
+    loadGroup(id)
+  }
+  groups.value.sort((a, b) => ids.indexOf(a.project.id) - ids.indexOf(b.project.id))
 })
+
+async function refreshAvatars() {
+  refreshing.value = true
+  try {
+    await refreshSlackDirectory()
+    await Promise.all(groups.value.map((g) => loadGroup(g.project.id)))
+  } catch (err) {
+    slackStatus.value = "degraded"
+    console.error(err)
+  } finally {
+    refreshing.value = false
+  }
+}
 </script>
 
 <template>
@@ -54,20 +92,46 @@ watch(selectedProjectId, async (id) => {
         <img src="/favicon.svg" alt="" class="size-7" />
         <span class="text-xl font-semibold">photofetch</span>
       </div>
-      <div class="flex-none">
+      <div class="flex flex-none items-center gap-2">
+        <button
+          v-if="groups.length > 0"
+          type="button"
+          class="btn btn-ghost btn-sm"
+          :disabled="refreshing"
+          title="Re-sweep the Slack directory"
+          @click="refreshAvatars"
+        >
+          <span v-if="refreshing" class="loading loading-spinner loading-xs"></span>
+          Refresh avatars
+        </button>
         <ProjectPicker
-          v-model="selectedProjectId"
+          v-model="selectedIds"
           :projects="projects"
           :disabled="projects.length === 0"
         />
       </div>
     </header>
 
-    <main class="mx-auto max-w-6xl p-4 sm:p-6">
-      <div v-if="source === 'fixture'" role="alert" class="alert alert-warning mb-4">
+    <main class="mx-auto max-w-6xl space-y-6 p-4 sm:p-6">
+      <div v-if="source === 'fixture'" role="alert" class="alert alert-warning">
         <span>
-          Showing demo data. Set <code>NAPTA_API_TOKEN</code> and <code>SLACK_BOT_TOKEN</code> on
-          the server to load your real projects.
+          Showing demo data. Set <code>NAPTA_CLIENT_ID</code> /
+          <code>NAPTA_CLIENT_SECRET</code> (and <code>SLACK_BOT_TOKEN</code>) on the server to load
+          real projects.
+        </span>
+      </div>
+
+      <div v-if="slackStatus === 'degraded'" role="alert" class="alert alert-warning">
+        <span>Couldn't reach Slack — showing names without up-to-date photos. Try Refresh.</span>
+      </div>
+      <div
+        v-else-if="slackStatus === 'unconfigured' && source === 'napta'"
+        role="alert"
+        class="alert alert-info"
+      >
+        <span>
+          Slack isn't configured, so Members show initials. Set
+          <code>SLACK_BOT_TOKEN</code> to load photos.
         </span>
       </div>
 
@@ -75,12 +139,17 @@ watch(selectedProjectId, async (id) => {
         <span>Could not load projects: {{ projectsError }}</span>
       </div>
 
-      <MemberGrid
-        v-else
-        :members="members"
-        :loading="loadingMembers"
-        :error="membersError"
-        :project-selected="!!selectedProjectId"
+      <div v-else-if="groups.length === 0" class="py-20 text-center opacity-60">
+        <p>Pick one or more projects to see their teams.</p>
+      </div>
+
+      <ProjectGroup
+        v-for="g in groups"
+        :key="g.project.id"
+        :project="g.project"
+        :members="g.members"
+        :loading="g.loading"
+        :error="g.error"
       />
     </main>
   </div>
diff --git a/src/api.ts b/src/api.ts
index bc8839d..27dd7e9 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -16,3 +16,12 @@ export function fetchProjects(): Promise<ProjectsResponse> {
 export function fetchMembers(projectId: string): Promise<MembersResponse> {
   return getJson<MembersResponse>(`/api/projects/${encodeURIComponent(projectId)}/members`)
 }
+
+export async function refreshSlackDirectory(): Promise<{ refreshed: number }> {
+  const res = await fetch("/api/slack/refresh", { method: "POST" })
+  if (!res.ok) {
+    const body = await res.text()
+    throw new Error(`${res.status} ${res.statusText}${body ? `: ${body}` : ""}`)
+  }
+  return (await res.json()) as { refreshed: number }
+}
diff --git a/src/components/ProjectGroup.vue b/src/components/ProjectGroup.vue
new file mode 100644
index 0000000..d597d2d
--- /dev/null
+++ b/src/components/ProjectGroup.vue
@@ -0,0 +1,32 @@
+<script setup lang="ts">
+import { computed } from "vue"
+import type { Member, Project } from "@/types"
+import MemberGrid from "@/components/MemberGrid.vue"
+
+const props = defineProps<{
+  project: Project
+  members: Member[]
+  loading: boolean
+  error: string | null
+}>()
+
+const matchedCount = computed(() => props.members.filter((m) => m.slackMatched).length)
+</script>
+
+<template>
+  <section>
+    <div class="mb-3 flex items-baseline justify-between gap-3">
+      <h2 class="text-lg font-semibold">
+        {{ project.name }}
+        <span v-if="project.clientName" class="font-normal opacity-60">
+          · {{ project.clientName }}
+        </span>
+      </h2>
+      <span v-if="!loading && !error" class="shrink-0 text-sm opacity-60">
+        {{ members.length }} {{ members.length === 1 ? "person" : "people" }}
+        <template v-if="members.length"> · {{ matchedCount }} with photos</template>
+      </span>
+    </div>
+    <MemberGrid :members="members" :loading="loading" :error="error" :project-selected="true" />
+  </section>
+</template>
diff --git a/src/components/ProjectPicker.vue b/src/components/ProjectPicker.vue
index 36b0f1a..2201cc7 100644
--- a/src/components/ProjectPicker.vue
+++ b/src/components/ProjectPicker.vue
@@ -1,28 +1,104 @@
 <script setup lang="ts">
+import { computed, ref } from "vue"
 import type { Project } from "@/types"
 
-defineProps<{
+const props = defineProps<{
   projects: Project[]
-  modelValue: string
+  modelValue: string[]
   disabled?: boolean
 }>()
 
-defineEmits<{
-  "update:modelValue": [value: string]
+const emit = defineEmits<{
+  "update:modelValue": [value: string[]]
 }>()
+
+const search = ref("")
+
+const filtered = computed(() => {
+  const q = search.value.trim().toLowerCase()
+  if (!q) return props.projects
+  return props.projects.filter(
+    (p) => p.name.toLowerCase().includes(q) || (p.clientName ?? "").toLowerCase().includes(q),
+  )
+})
+
+const selectedProjects = computed(() =>
+  props.modelValue
+    .map((id) => props.projects.find((p) => p.id === id))
+    .filter((p): p is Project => Boolean(p)),
+)
+
+function isSelected(id: string): boolean {
+  return props.modelValue.includes(id)
+}
+
+function toggle(id: string) {
+  const next = isSelected(id) ? props.modelValue.filter((x) => x !== id) : [...props.modelValue, id]
+  emit("update:modelValue", next)
+}
+
+function remove(id: string) {
+  emit(
+    "update:modelValue",
+    props.modelValue.filter((x) => x !== id),
+  )
+}
 </script>
 
 <template>
-  <select
-    class="select select-bordered w-72 max-w-full"
-    :value="modelValue"
-    :disabled="disabled"
-    aria-label="Select a project"
-    @change="$emit('update:modelValue', ($event.target as HTMLSelectElement).value)"
-  >
-    <option v-if="projects.length === 0" value="">No projects available</option>
-    <option v-for="p in projects" :key="p.id" :value="p.id">
-      {{ p.name }}<template v-if="p.clientName"> — {{ p.clientName }}</template>
-    </option>
-  </select>
+  <div class="flex items-center gap-2">
+    <div v-if="selectedProjects.length" class="hidden max-w-md flex-wrap gap-1 lg:flex">
+      <span v-for="p in selectedProjects" :key="p.id" class="badge badge-primary gap-1">
+        {{ p.name }}
+        <button
+          class="leading-none"
+          type="button"
+          :aria-label="`Remove ${p.name}`"
+          @click="remove(p.id)"
+        >
+          ✕
+        </button>
+      </span>
+    </div>
+
+    <div class="dropdown dropdown-end">
+      <div tabindex="0" role="button" class="btn btn-sm" :class="{ 'btn-disabled': disabled }">
+        Projects
+        <span v-if="modelValue.length" class="badge badge-sm badge-primary">
+          {{ modelValue.length }}
+        </span>
+      </div>
+      <div
+        tabindex="0"
+        class="dropdown-content z-10 mt-2 w-80 rounded-box bg-base-100 p-2 shadow-lg"
+      >
+        <input
+          v-model="search"
+          type="text"
+          placeholder="Search projects…"
+          class="input input-sm input-bordered mb-2 w-full"
+          aria-label="Search projects"
+        />
+        <ul class="menu max-h-72 flex-nowrap gap-0 overflow-y-auto p-0">
+          <li v-for="p in filtered" :key="p.id">
+            <label class="flex cursor-pointer items-center gap-2">
+              <input
+                type="checkbox"
+                class="checkbox checkbox-sm"
+                :checked="isSelected(p.id)"
+                @change="toggle(p.id)"
+              />
+              <span class="flex-1 truncate">
+                {{ p.name }}
+                <span v-if="p.clientName" class="opacity-60">· {{ p.clientName }}</span>
+              </span>
+            </label>
+          </li>
+          <li v-if="filtered.length === 0" class="px-2 py-1 text-sm opacity-60">
+            No matching projects
+          </li>
+        </ul>
+      </div>
+    </div>
+  </div>
 </template>
diff --git a/src/types.ts b/src/types.ts
index e7aa6a7..d37171c 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -15,6 +15,7 @@ export interface Member {
 }
 
 export type DataSource = "napta" | "fixture"
+export type SlackStatus = "ok" | "degraded" | "unconfigured"
 
 export interface ProjectsResponse {
   source: DataSource
@@ -23,5 +24,6 @@ export interface ProjectsResponse {
 
 export interface MembersResponse {
   source: DataSource
+  slack: SlackStatus
   members: Member[]
 }