diff --git a/src/__tests__/useCatalog.test.js b/src/__tests__/useCatalog.test.js
index 10d28e8..39dea44 100644
--- a/src/__tests__/useCatalog.test.js
+++ b/src/__tests__/useCatalog.test.js
@@ -1,5 +1,5 @@
 import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
-import { useCatalog } from '../composables/useCatalog'
+import { useCatalog, applyClientFilters } from '../composables/useCatalog'
 
 // Minimal IndexedDB mock via fake-indexeddb shim. `idb` resolves its backing
 // store from the global `indexedDB`; jsdom does not provide one.
@@ -17,11 +17,12 @@ describe('useCatalog — cross-source catalog composable (Plan C §4)', () => {
     vi.restoreAllMocks()
   })
 
-  it('listEntries builds a filter query string and populates entries', async () => {
+  it('listEntries reads the backend Page{items} shape and only sends server-honored params', async () => {
     globalThis.fetch = vi.fn().mockResolvedValue({
       ok: true,
       json: async () => ({
-        entries: [
+        // Backend returns a Page object, not { entries }.
+        items: [
           {
             kind: 'lab',
             name: 'demo-lab',
@@ -29,19 +30,26 @@ describe('useCatalog — cross-source catalog composable (Plan C §4)', () => {
             path: 'labs/demo',
           },
         ],
-        source_sha: 'abc123',
+        total: 1,
+        offset: 0,
+        limit: 100,
       }),
     })
 
     const { entries, listEntries } = useCatalog()
-    const out = await listEntries({ kind: ['lab'], source: 'src-a', q: 'demo' })
+    const out = await listEntries({ kind: 'lab', source_id: 'src-a', tag: 'web' })
 
     expect(globalThis.fetch).toHaveBeenCalledTimes(1)
     const url = globalThis.fetch.mock.calls[0][0]
     expect(url).toMatch(/^\/v1\/catalog\/entries\?/)
+    // Aligned param names that the backend actually honors.
     expect(url).toContain('kind=lab')
-    expect(url).toContain('source=src-a')
-    expect(url).toContain('q=demo')
+    expect(url).toContain('source_id=src-a')
+    expect(url).toContain('tag=web')
+    // Legacy / unsupported param names must NOT be sent.
+    expect(url).not.toContain('source=src-a')
+    expect(url).not.toMatch(/[?&]tags=/)
+    expect(url).not.toMatch(/[?&](os|difficulty|q)=/)
 
     expect(out).toHaveLength(1)
     expect(entries.value).toHaveLength(1)
@@ -86,3 +94,55 @@ describe('useCatalog — cross-source catalog composable (Plan C §4)', () => {
     expect(url).toContain('gamenets/ctf/range42.yaml')
   })
 })
+
+describe('applyClientFilters — presentation-side refinement', () => {
+  const entries = [
+    { kind: 'lab', name: 'Web Recon', source_id: 'src-a', path: 'labs/web', os: 'ubuntu', difficulty: 'easy', tags: ['web', 'recon'] },
+    { kind: 'container', name: 'SQLi Box', source_id: 'src-b', path: 'cve/web/sqli', os: 'debian', difficulty: 'hard', tags: ['web', 'sqli'] },
+    { kind: 'ansible_role', name: 'Install Wazuh', source_id: 'src-a', path: 'roles/wazuh', os: '', difficulty: '', tags: ['monitoring'] },
+  ]
+
+  it('returns all entries when no filters are given', () => {
+    expect(applyClientFilters(entries)).toHaveLength(3)
+    expect(applyClientFilters(entries, {})).toHaveLength(3)
+  })
+
+  it('filters by multiple kinds (OR within kinds)', () => {
+    const out = applyClientFilters(entries, { kinds: ['lab', 'ansible_role'] })
+    expect(out.map((e) => e.name)).toEqual(['Web Recon', 'Install Wazuh'])
+  })
+
+  it('filters by multiple sources (OR within sources)', () => {
+    const out = applyClientFilters(entries, { sources: ['src-b'] })
+    expect(out.map((e) => e.name)).toEqual(['SQLi Box'])
+  })
+
+  it('requires ALL tags to match (AND across tags)', () => {
+    expect(applyClientFilters(entries, { tags: ['web'] }).map((e) => e.name)).toEqual([
+      'Web Recon',
+      'SQLi Box',
+    ])
+    expect(applyClientFilters(entries, { tags: ['web', 'sqli'] }).map((e) => e.name)).toEqual([
+      'SQLi Box',
+    ])
+  })
+
+  it('filters by os and difficulty case-insensitively', () => {
+    expect(applyClientFilters(entries, { os: 'UBUNTU' }).map((e) => e.name)).toEqual(['Web Recon'])
+    expect(applyClientFilters(entries, { difficulty: 'Hard' }).map((e) => e.name)).toEqual([
+      'SQLi Box',
+    ])
+  })
+
+  it('free-text q matches name, description, and path', () => {
+    expect(applyClientFilters(entries, { q: 'sqli' }).map((e) => e.name)).toEqual(['SQLi Box'])
+    expect(applyClientFilters(entries, { q: 'roles/' }).map((e) => e.name)).toEqual([
+      'Install Wazuh',
+    ])
+  })
+
+  it('combines client filters (AND across dimensions)', () => {
+    const out = applyClientFilters(entries, { kinds: ['lab', 'container'], tags: ['web'], os: 'debian' })
+    expect(out.map((e) => e.name)).toEqual(['SQLi Box'])
+  })
+})
diff --git a/src/__tests__/views/CatalogList.test.js b/src/__tests__/views/CatalogList.test.js
new file mode 100644
index 0000000..ba60dad
--- /dev/null
+++ b/src/__tests__/views/CatalogList.test.js
@@ -0,0 +1,116 @@
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
+import { mount, flushPromises } from '@vue/test-utils'
+import { createRouter, createMemoryHistory } from 'vue-router'
+import { createPinia, setActivePinia } from 'pinia'
+import { createI18n } from 'vue-i18n'
+import 'fake-indexeddb/auto'
+import CatalogList from '@/views/CatalogList.vue'
+import { useInventoryStore } from '@/stores/inventoryStore'
+import catalogEn from '@/locales/en/catalog.json'
+import commonEn from '@/locales/en/common.json'
+import sourcesEn from '@/locales/en/sources.json'
+
+// Two entries from the SAME source but DIFFERENT kinds, so that kind filtering
+// is exercised in isolation from source filtering.
+const PAGE = {
+  items: [
+    { kind: 'lab', name: 'Web Recon', source_id: 'src-a', path: 'labs/web', tags: ['web'] },
+    { kind: 'container', name: 'SQLi Box', source_id: 'src-a', path: 'cve/web/sqli', tags: ['web', 'sqli'] },
+  ],
+  total: 2,
+  offset: 0,
+  limit: 500,
+}
+
+function makeI18n() {
+  return createI18n({
+    legacy: false,
+    locale: 'en',
+    fallbackLocale: 'en',
+    messages: { en: { catalog: catalogEn, common: commonEn, sources: sourcesEn } },
+  })
+}
+
+function makeRouter() {
+  return createRouter({
+    history: createMemoryHistory(),
+    routes: [
+      { path: '/', name: 'home', component: { template: '<div/>' } },
+      { path: '/sources', name: 'sources', component: { template: '<div/>' } },
+      { path: '/catalog/:source/:entry', name: 'catalog-entry', component: { template: '<div/>' } },
+      { path: '/project/:id', name: 'project', component: { template: '<div/>' } },
+    ],
+  })
+}
+
+async function mountList() {
+  const pinia = createPinia()
+  setActivePinia(pinia)
+  const inv = useInventoryStore()
+  inv.addSource({ id: 'src-a', provider: 'gitlab', base_url: 'https://gl.example', auth: { kind: 'none' }, repos: [] })
+
+  const wrapper = mount(CatalogList, {
+    global: { plugins: [pinia, makeI18n(), makeRouter()] },
+  })
+  await flushPromises()
+  return wrapper
+}
+
+function gridKinds(wrapper) {
+  return wrapper
+    .findAll('[data-testid="catalog-grid"] article[data-kind]')
+    .map((el) => el.attributes('data-kind'))
+}
+
+function kindButton(wrapper, label) {
+  return wrapper.findAll('button').find((b) => b.text() === label)
+}
+
+describe('CatalogList — filter wiring (regression guard for server-narrowing bug)', () => {
+  beforeEach(() => {
+    // The jsdom localStorage mock persists across tests; clear it so each test
+    // starts with a fresh inventory store (addSource throws on a duplicate id).
+    localStorage.clear()
+    globalThis.fetch = vi.fn().mockResolvedValue({ ok: true, json: async () => PAGE })
+  })
+  afterEach(() => {
+    vi.restoreAllMocks()
+  })
+
+  it('renders all fetched entries and fetches the full set once (no per-filter refetch)', async () => {
+    const wrapper = await mountList()
+    expect(gridKinds(wrapper)).toEqual(['lab', 'container'])
+    // The grid fetches once on mount; the request carries no narrowing filter
+    // params (only a limit), since all filtering is client-side.
+    expect(globalThis.fetch).toHaveBeenCalledTimes(1)
+    const url = globalThis.fetch.mock.calls[0][0]
+    expect(url).toContain('/v1/catalog/entries')
+    expect(url).not.toMatch(/[?&]kind=/)
+    expect(url).not.toMatch(/[?&]source_id=/)
+  })
+
+  it('narrows to a single kind, then WIDENS to multiple without a refetch (the bug)', async () => {
+    const wrapper = await mountList()
+
+    await kindButton(wrapper, 'lab').trigger('click')
+    await flushPromises()
+    expect(gridKinds(wrapper)).toEqual(['lab'])
+
+    // Widening the selection must surface the second kind from the already-
+    // fetched superset — the previous server-narrowing design dropped it here.
+    await kindButton(wrapper, 'container').trigger('click')
+    await flushPromises()
+    expect(gridKinds(wrapper)).toEqual(['lab', 'container'])
+
+    // Still only the initial fetch — filtering never hit the network again.
+    expect(globalThis.fetch).toHaveBeenCalledTimes(1)
+  })
+
+  it('applies the free-text search client-side over the fetched set', async () => {
+    const wrapper = await mountList()
+    await wrapper.find('input[type="search"]').setValue('sqli')
+    await flushPromises()
+    expect(gridKinds(wrapper)).toEqual(['container'])
+    expect(globalThis.fetch).toHaveBeenCalledTimes(1)
+  })
+})
diff --git a/src/components/ui/CatalogTile.vue b/src/components/ui/CatalogTile.vue
index 52e283f..11bf8cb 100644
--- a/src/components/ui/CatalogTile.vue
+++ b/src/components/ui/CatalogTile.vue
@@ -18,10 +18,17 @@ const kindBadgeClass = computed(() => {
       return 'badge-secondary'
     case 'component':
       return 'badge-accent'
+    case 'container':
+      return 'badge-info'
+    case 'ansible_role':
+      return 'badge-warning'
     default:
       return 'badge-ghost'
   }
 })
+
+// Render `ansible_role` as a readable label without changing the underlying value.
+const kindLabel = computed(() => String(props.entry?.kind ?? '').replace(/_/g, ' '))
 </script>
 
 <template>
@@ -38,7 +45,7 @@ const kindBadgeClass = computed(() => {
             {{ entry.source_id }} · {{ entry.path }}
           </p>
         </div>
-        <span class="badge" :class="kindBadgeClass">{{ entry.kind }}</span>
+        <span class="badge" :class="kindBadgeClass">{{ kindLabel }}</span>
       </header>
 
       <p v-if="entry.description" class="text-sm text-base-content/70 line-clamp-3 mt-2">
diff --git a/src/composables/useCatalog.ts b/src/composables/useCatalog.ts
index 4d4dac7..4baf7f2 100644
--- a/src/composables/useCatalog.ts
+++ b/src/composables/useCatalog.ts
@@ -13,17 +13,33 @@ import { openDB, type IDBPDatabase } from 'idb'
 // Types
 // =============================================================================
 
+/**
+ * Server-side filters accepted by `GET /v1/catalog/entries`.
+ *
+ * These mirror exactly what the backend honors — `source_id`, `kind`, `tag`
+ * (singular), `offset`, `limit`. Presentation-only refinement (os, difficulty,
+ * free-text, multi-select) is applied client-side via {@link applyClientFilters}
+ * so the API client stays a faithful mirror of the backend contract.
+ */
 export interface CatalogEntryFilters {
-  kind?: string | string[]
-  source?: string | string[]
-  os?: string | string[]
-  difficulty?: string | string[]
-  tags?: string | string[]
-  q?: string
+  kind?: string
+  source_id?: string
+  tag?: string
+  offset?: number
+  limit?: number
 }
 
+/** Kinds the backend can emit; see range42-backend-api catalog/entries.py. */
+export type CatalogEntryKind =
+  | 'lab'
+  | 'gamenet'
+  | 'component'
+  | 'container'
+  | 'ansible_role'
+  | 'unknown'
+
 export interface CatalogEntry {
-  kind: 'lab' | 'gamenet' | 'component' | string
+  kind: CatalogEntryKind | string
   name: string
   description?: string
   tags?: string[]
@@ -39,9 +55,55 @@ export interface CatalogEntry {
   metadata?: Record<string, unknown>
 }
 
-export interface CatalogListResponse {
-  entries: CatalogEntry[]
-  source_sha?: string
+/** Paged response envelope returned by the backend (`app.schemas.v1.common.Page`). */
+export interface CatalogPage {
+  items: CatalogEntry[]
+  total: number
+  offset: number
+  limit: number
+}
+
+/** Presentation-side filters applied in the browser over fetched entries. */
+export interface CatalogClientFilters {
+  kinds?: string[]
+  sources?: string[]
+  tags?: string[]
+  os?: string
+  difficulty?: string
+  q?: string
+}
+
+/**
+ * Refine an already-fetched entry list in the browser. The backend only
+ * filters by a single `source_id`/`kind`/`tag`, so multi-select and the
+ * os/difficulty/free-text controls are resolved here. All dimensions combine
+ * with AND; values within `kinds`/`sources` combine with OR; every tag in
+ * `tags` must be present (AND).
+ */
+export function applyClientFilters(
+  entries: CatalogEntry[] | null | undefined,
+  filters: CatalogClientFilters = {},
+): CatalogEntry[] {
+  const { kinds, sources, tags, os, difficulty, q } = filters
+  let out = entries ?? []
+  if (kinds?.length) out = out.filter((e) => kinds.includes(e.kind))
+  if (sources?.length) out = out.filter((e) => sources.includes(e.source_id))
+  if (tags?.length) out = out.filter((e) => tags.every((tIdx) => (e.tags ?? []).includes(tIdx)))
+  if (os) {
+    const needle = os.toLowerCase()
+    out = out.filter((e) => (e.os ?? '').toLowerCase() === needle)
+  }
+  if (difficulty) {
+    const needle = difficulty.toLowerCase()
+    out = out.filter((e) => (e.difficulty ?? '').toLowerCase() === needle)
+  }
+  if (q) {
+    const needle = q.toLowerCase()
+    out = out.filter((e) =>
+      [e.name, e.description, e.path].some((s) => (s ?? '').toLowerCase().includes(needle)),
+    )
+  }
+  return out
 }
 
 // =============================================================================
@@ -71,18 +133,15 @@ function buildQueryString(filters: CatalogEntryFilters): string {
   const params = new URLSearchParams()
   const put = (k: string, v: unknown) => {
     if (v === undefined || v === null || v === '') return
-    if (Array.isArray(v)) {
-      v.forEach((x) => params.append(k, String(x)))
-    } else {
-      params.append(k, String(v))
-    }
+    params.append(k, String(v))
   }
+  // Only the parameters the backend actually filters on. Sending the legacy
+  // `source`/`tags`/`os`/`difficulty`/`q` names was silently ignored server-side.
   put('kind', filters.kind)
-  put('source', filters.source)
-  put('os', filters.os)
-  put('difficulty', filters.difficulty)
-  put('tags', filters.tags)
-  put('q', filters.q)
+  put('source_id', filters.source_id)
+  put('tag', filters.tag)
+  put('offset', filters.offset)
+  put('limit', filters.limit)
   const qs = params.toString()
   return qs ? `?${qs}` : ''
 }
@@ -110,13 +169,12 @@ export function useCatalog() {
       if (!res.ok) {
         throw new Error(`catalog list failed: ${res.status}`)
       }
-      const data = (await res.json()) as CatalogListResponse
-      entries.value = data.entries || []
-      // Cache by source_sha when available, else by filter key.
+      const data = (await res.json()) as CatalogPage
+      entries.value = data.items || []
+      // Cache by filter key (the Page envelope carries no source SHA).
       try {
         const db = await getDb()
-        const ck = data.source_sha ? `entries:${data.source_sha}` : key
-        await db.put(STORE, { entries: entries.value, ts: Date.now() }, ck)
+        await db.put(STORE, { entries: entries.value, ts: Date.now() }, key)
       } catch {
         /* ignore cache failures */
       }
diff --git a/src/locales/en/common.json b/src/locales/en/common.json
index e79f18c..b2719b7 100644
--- a/src/locales/en/common.json
+++ b/src/locales/en/common.json
@@ -7,5 +7,6 @@
   "settings": "Settings",
   "close": "Close",
   "add": "Add",
-  "remove": "Remove"
+  "remove": "Remove",
+  "retry": "Retry"
 }
diff --git a/src/locales/fr/common.json b/src/locales/fr/common.json
index 3017b4a..6624693 100644
--- a/src/locales/fr/common.json
+++ b/src/locales/fr/common.json
@@ -7,5 +7,6 @@
   "settings": "Paramètres",
   "close": "Fermer",
   "add": "Ajouter",
-  "remove": "Supprimer"
+  "remove": "Supprimer",
+  "retry": "Réessayer"
 }
diff --git a/src/locales/jp/common.json b/src/locales/jp/common.json
index 5c4dbcd..590b455 100644
--- a/src/locales/jp/common.json
+++ b/src/locales/jp/common.json
@@ -7,5 +7,6 @@
   "settings": "設定",
   "close": "閉じる",
   "add": "追加",
-  "remove": "削除"
+  "remove": "削除",
+  "retry": "再試行"
 }
diff --git a/src/views/CatalogList.vue b/src/views/CatalogList.vue
index 3eca700..2df1b6f 100644
--- a/src/views/CatalogList.vue
+++ b/src/views/CatalogList.vue
@@ -1,8 +1,8 @@
 <script setup>
-import { ref, computed, onMounted, watch } from 'vue'
+import { ref, computed, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
-import { useCatalog } from '@/composables/useCatalog'
+import { useCatalog, applyClientFilters } from '@/composables/useCatalog'
 import { useInventoryStore } from '@/stores/inventoryStore'
 import { useProjectStore } from '@/stores/projectStore'
 import { getProvider } from '@/services/git'
@@ -34,24 +34,32 @@ const forkTargetName = ref('')
 const forkBusy = ref(false)
 const forkError = ref('')
 
-const KINDS = ['lab', 'gamenet', 'component']
+// Kinds the backend can emit (catalog/entries.py). `unknown` is a fallback
+// bucket, not a useful filter facet, so it is intentionally omitted here.
+const KINDS = ['lab', 'gamenet', 'component', 'container', 'ansible_role']
 const DIFFICULTIES = ['easy', 'medium', 'hard']
 
-// Proxy the ref so the template always sees a plain array (composables
-// return a Ref<T[]>; in templates Vue unwraps `catalog.entries`, but the
-// extra computed insulates us from shape drift).
-const entriesView = computed(() => entries.value || [])
-
-const filters = computed(() => ({
-  kind: selectedKinds.value.length ? selectedKinds.value : undefined,
-  source: selectedSources.value.length ? selectedSources.value : undefined,
-  os: selectedOs.value || undefined,
-  difficulty: selectedDifficulty.value || undefined,
-  tags: tagInput.value
+const parsedTags = computed(() =>
+  tagInput.value
     ? tagInput.value.split(',').map((s) => s.trim()).filter(Boolean)
-    : undefined,
-  q: searchQuery.value || undefined,
-}))
+    : [],
+)
+
+// All filtering is client-side. We fetch the full entry set once (the backend
+// pages at `limit`) and keep `entries.value` as a stable superset, so toggling
+// any control is instant and — crucially — never operates over a server-narrowed
+// subset. (An earlier version narrowed server-side on single-select, which made
+// widening a selection show too few results until a refetch resolved.)
+const entriesView = computed(() =>
+  applyClientFilters(entries.value, {
+    kinds: selectedKinds.value,
+    sources: selectedSources.value,
+    tags: parsedTags.value,
+    os: selectedOs.value || undefined,
+    difficulty: selectedDifficulty.value || undefined,
+    q: searchQuery.value || undefined,
+  }),
+)
 
 function toggleKind(kind) {
   const i = selectedKinds.value.indexOf(kind)
@@ -74,14 +82,14 @@ function clearFilters() {
   searchQuery.value = ''
 }
 
+// Fetch the full entry set; a generous limit avoids silently truncating
+// catalogs. Real pagination is deferred (TODO) — acceptable while catalogs are
+// small. Filtering happens entirely client-side in `entriesView`, so there is
+// no per-filter refetch.
 async function refresh() {
-  await catalog.listEntries(filters.value)
+  await catalog.listEntries({ limit: 500 })
 }
 
-watch(filters, () => {
-  refresh()
-}, { deep: true })
-
 onMounted(async () => {
   await ensureNamespaces(['catalog', 'common', 'sources'])
   projects.loadProjects?.()
@@ -219,7 +227,7 @@ async function submitFork() {
               :class="selectedKinds.includes(k) ? 'btn-primary' : 'btn-ghost'"
               @click="toggleKind(k)"
             >
-              {{ k }}
+              {{ k.replace(/_/g, ' ') }}
             </button>
           </div>
         </div>
@@ -312,7 +320,7 @@ async function submitFork() {
       >
         <span class="text-sm">{{ loadError }}</span>
         <button class="btn btn-xs btn-ghost" @click="refresh">
-          {{ t('catalog.filters.clear') }}
+          {{ t('common.retry') }}
         </button>
       </div>