improved UX in dashboard

common.php

@@ -247,12 +247,12 @@ function qdb_upsert_source_translation(PDO $pdo, string $type, string $id, strin
 }
 
 /** Catalog of global app UI string keys (LanguageManager). */
-function qdb_app_string_catalog(): array {
+function qdb_app_string_catalog(bool $reload = false): array {
     static $catalog = null;
-    if ($catalog !== null) {
+    if (!$reload && $catalog !== null) {
         return $catalog;
     }
-    $path = __DIR__ . '/data/app_ui_strings.json';
+    $path = qdb_app_string_catalog_path();
     if (!is_readable($path)) {
         $catalog = ['keys' => [], 'germanDefaults' => []];
         return $catalog;
@@ -262,6 +262,49 @@ function qdb_app_string_catalog(): array {
     return $catalog;
 }
 
+function qdb_app_string_catalog_path(): string {
+    return __DIR__ . '/data/app_ui_strings.json';
+}
+
+/** Remove questionnaire_group_* from catalog file (keys list + germanDefaults). */
+function qdb_remove_questionnaire_group_from_catalog(string $stringKey): void {
+    if (!qdb_is_questionnaire_group_string_key($stringKey)) {
+        return;
+    }
+    $path = qdb_app_string_catalog_path();
+    if (!is_readable($path) || !is_writable($path)) {
+        return;
+    }
+    $data = json_decode(file_get_contents($path), true);
+    if (!is_array($data)) {
+        return;
+    }
+    $changed = false;
+    if (!empty($data['keys']) && is_array($data['keys'])) {
+        $next = array_values(array_filter(
+            $data['keys'],
+            fn($k) => (string)$k !== $stringKey
+        ));
+        if (count($next) !== count($data['keys'])) {
+            $data['keys'] = $next;
+            $changed = true;
+        }
+    }
+    if (!empty($data['germanDefaults']) && is_array($data['germanDefaults']) && array_key_exists($stringKey, $data['germanDefaults'])) {
+        unset($data['germanDefaults'][$stringKey]);
+        $changed = true;
+    }
+    if (!$changed) {
+        return;
+    }
+    file_put_contents(
+        $path,
+        json_encode($data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT) . "\n",
+        LOCK_EX
+    );
+    qdb_app_string_catalog(true);
+}
+
 function qdb_app_string_key_set(): array {
     $keys = qdb_app_string_catalog()['keys'] ?? [];
     return array_flip($keys);
@@ -299,6 +342,204 @@ function qdb_dev_only_app_string_key_set(): array {
     return $set;
 }
 
+/** Prefix for app UI strings that label questionnaire category groups on the opening screen. */
+function qdb_questionnaire_group_prefix(): string {
+    return 'questionnaire_group_';
+}
+
+function qdb_questionnaire_group_string_key(string $categoryKey): string {
+    $categoryKey = trim($categoryKey);
+    return $categoryKey === '' ? '' : qdb_questionnaire_group_prefix() . $categoryKey;
+}
+
+function qdb_is_questionnaire_group_string_key(string $stringKey): bool {
+    return str_starts_with($stringKey, qdb_questionnaire_group_prefix());
+}
+
+function qdb_category_key_from_group_string_key(string $stringKey): string {
+    $prefix = qdb_questionnaire_group_prefix();
+    return str_starts_with($stringKey, $prefix) ? substr($stringKey, strlen($prefix)) : '';
+}
+
+/** @return array<string, int> categoryKey => questionnaire count */
+function qdb_category_keys_in_use(PDO $pdo): array {
+    $map = [];
+    $rows = $pdo->query(
+        "SELECT categoryKey, COUNT(*) AS c FROM questionnaire
+         WHERE trim(categoryKey) != '' GROUP BY categoryKey"
+    )->fetchAll(PDO::FETCH_ASSOC);
+    foreach ($rows as $row) {
+        $k = trim((string)($row['categoryKey'] ?? ''));
+        if ($k !== '') {
+            $map[$k] = (int)$row['c'];
+        }
+    }
+    return $map;
+}
+
+/**
+ * App string entries for category keys in use (not already in the static JSON catalog keys list).
+ * @return list<array{key: string, displayKey: string, type: string, entityId: string, sortOrder: int, germanDefault: string, categoryKey: string}>
+ */
+function qdb_category_group_string_entries(PDO $pdo): array {
+    $catalog = qdb_app_string_catalog();
+    $defaults = $catalog['germanDefaults'] ?? [];
+    $staticKeys = qdb_app_string_key_set();
+    $entries = [];
+    $order = 0;
+    foreach (qdb_category_keys_in_use($pdo) as $catKey => $_count) {
+        $stringKey = qdb_questionnaire_group_string_key($catKey);
+        if ($stringKey === '' || isset($staticKeys[$stringKey])) {
+            continue;
+        }
+        $entries[] = [
+            'key'           => $stringKey,
+            'displayKey'    => $stringKey,
+            'type'          => 'app_string',
+            'entityId'      => $stringKey,
+            'sortOrder'     => $order++,
+            'germanDefault' => $defaults[$stringKey] ?? $catKey,
+            'categoryKey'   => $catKey,
+        ];
+    }
+    usort($entries, fn($a, $b) => strcmp($a['categoryKey'], $b['categoryKey']));
+    return $entries;
+}
+
+/**
+ * Category keys with translations in DB but no questionnaire using them.
+ * @return list<string>
+ */
+function qdb_orphaned_category_keys(PDO $pdo): array {
+    $inUse = qdb_category_keys_in_use($pdo);
+    $prefix = qdb_questionnaire_group_prefix();
+    $orphans = [];
+    $stmt = $pdo->query(
+        "SELECT DISTINCT stringKey FROM string_translation WHERE stringKey LIKE " . $pdo->quote($prefix . '%')
+    );
+    foreach ($stmt->fetchAll(PDO::FETCH_COLUMN) as $stringKey) {
+        $catKey = qdb_category_key_from_group_string_key((string)$stringKey);
+        if ($catKey !== '' && !isset($inUse[$catKey])) {
+            $orphans[$catKey] = true;
+        }
+    }
+    ksort($orphans);
+    return array_keys($orphans);
+}
+
+/**
+ * @return list<array{categoryKey: string, stringKey: string, questionnaireCount: int, orphaned: bool, germanLabel: string}>
+ */
+function qdb_list_category_keys_for_dashboard(PDO $pdo): array {
+    $defaults = qdb_app_string_catalog()['germanDefaults'] ?? [];
+    $inUse = qdb_category_keys_in_use($pdo);
+    $list = [];
+
+    $loadGerman = function (string $stringKey) use ($pdo, $defaults): string {
+        $stmt = $pdo->prepare(
+            'SELECT text FROM string_translation WHERE stringKey = :k AND languageCode = :lang LIMIT 1'
+        );
+        $stmt->execute([':k' => $stringKey, ':lang' => QDB_SOURCE_LANGUAGE]);
+        $text = $stmt->fetchColumn();
+        if (is_string($text) && $text !== '') {
+            return $text;
+        }
+        return $defaults[$stringKey] ?? '';
+    };
+
+    foreach ($inUse as $catKey => $count) {
+        $stringKey = qdb_questionnaire_group_string_key($catKey);
+        $list[] = [
+            'categoryKey'         => $catKey,
+            'stringKey'           => $stringKey,
+            'questionnaireCount'  => $count,
+            'orphaned'            => false,
+            'germanLabel'         => $loadGerman($stringKey) ?: $catKey,
+        ];
+    }
+
+    foreach (qdb_orphaned_category_keys($pdo) as $catKey) {
+        $stringKey = qdb_questionnaire_group_string_key($catKey);
+        $list[] = [
+            'categoryKey'         => $catKey,
+            'stringKey'           => $stringKey,
+            'questionnaireCount'  => 0,
+            'orphaned'            => true,
+            'germanLabel'         => $loadGerman($stringKey) ?: $catKey,
+        ];
+    }
+
+    usort($list, fn($a, $b) => strcmp($a['categoryKey'], $b['categoryKey']));
+    return $list;
+}
+
+/** Persist default German for a questionnaire_group_* key in app_ui_strings.json. */
+function qdb_update_questionnaire_group_german_default(string $stringKey, string $text): void {
+    if (!qdb_is_questionnaire_group_string_key($stringKey)) {
+        return;
+    }
+    $path = qdb_app_string_catalog_path();
+    if (!is_readable($path) || !is_writable($path)) {
+        return;
+    }
+    $data = json_decode(file_get_contents($path), true);
+    if (!is_array($data)) {
+        return;
+    }
+    if (!isset($data['germanDefaults']) || !is_array($data['germanDefaults'])) {
+        $data['germanDefaults'] = [];
+    }
+    if (($data['germanDefaults'][$stringKey] ?? '') === $text) {
+        return;
+    }
+    $data['germanDefaults'][$stringKey] = $text;
+    file_put_contents(
+        $path,
+        json_encode($data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT) . "\n",
+        LOCK_EX
+    );
+    qdb_app_string_catalog(true);
+}
+
+/** Set German label for a category (app opening screen group title). */
+function qdb_set_category_german_label(PDO $pdo, string $categoryKey, string $text): string {
+    $categoryKey = trim($categoryKey);
+    if ($categoryKey === '') {
+        json_error('INVALID_FIELD', 'categoryKey is required', 400);
+    }
+    $text = trim($text);
+    if ($text === '') {
+        json_error('INVALID_FIELD', 'German label is required', 400);
+    }
+    $stringKey = qdb_questionnaire_group_string_key($categoryKey);
+    qdb_put_translation($pdo, 'app_string', $stringKey, QDB_SOURCE_LANGUAGE, $text);
+    qdb_update_questionnaire_group_german_default($stringKey, $text);
+    return $stringKey;
+}
+
+/**
+ * Remove a category key completely: clear questionnaires, translations, and catalog defaults.
+ * @return int questionnaires updated
+ */
+function qdb_delete_category_key(PDO $pdo, string $categoryKey): int {
+    $categoryKey = trim($categoryKey);
+    if ($categoryKey === '') {
+        json_error('INVALID_FIELD', 'categoryKey is required', 400);
+    }
+    $stringKey = qdb_questionnaire_group_string_key($categoryKey);
+
+    $stmt = $pdo->prepare('UPDATE questionnaire SET categoryKey = \'\' WHERE categoryKey = :ck');
+    $stmt->execute([':ck' => $categoryKey]);
+    $cleared = $stmt->rowCount();
+
+    $pdo->prepare('DELETE FROM string_translation WHERE stringKey = :k')
+        ->execute([':k' => $stringKey]);
+
+    qdb_remove_questionnaire_group_from_catalog($stringKey);
+
+    return $cleared;
+}
+
 /**
  * Global app UI strings (screens, toasts, auth, etc.) for the mobile app.
  * @return list<array{key: string, type: string, entityId: string, sortOrder: int}>
@@ -309,6 +550,9 @@ function qdb_app_ui_string_entries(): array {
     $entries = [];
     $order = 0;
     foreach ($catalog['keys'] ?? [] as $key) {
+        if (qdb_is_questionnaire_group_string_key($key)) {
+            continue;
+        }
         $entries[] = [
             'key'           => $key,
             'displayKey'    => $key,
@@ -321,6 +565,20 @@ function qdb_app_ui_string_entries(): array {
     return $entries;
 }
 
+/**
+ * Static catalog plus questionnaire_group_* keys for categoryKey values in use.
+ * @return list<array{key: string, type: string, entityId: string, sortOrder: int}>
+ */
+function qdb_app_ui_string_entries_merged(PDO $pdo): array {
+    $merged = qdb_app_ui_string_entries();
+    $order = count($merged);
+    foreach (qdb_category_group_string_entries($pdo) as $e) {
+        $e['sortOrder'] = $order++;
+        $merged[] = $e;
+    }
+    return $merged;
+}
+
 /**
  * All string keys referenced by questionnaire content (questions, options, config).
  * @return array<string, true>
@@ -384,10 +642,10 @@ function qdb_all_questionnaire_translation_key_set(PDO $pdo): array {
  * App UI catalog for the website Translations page (coach-visible, no dev-only keys).
  * Catalog keys always appear here even when also used inside a questionnaire (e.g. "save").
  */
-function qdb_app_ui_string_entries_for_website(): array {
+function qdb_app_ui_string_entries_for_website(PDO $pdo): array {
     $dev = qdb_dev_only_app_string_key_set();
     $entries = [];
-    foreach (qdb_app_ui_string_entries() as $e) {
+    foreach (qdb_app_ui_string_entries_merged($pdo) as $e) {
         if (!isset($dev[$e['key']])) {
             $entries[] = $e;
         }
@@ -913,7 +1171,7 @@ function qdb_load_translations_for_entries(PDO $pdo, array $entries): array {
  * @return array<string, array<string, string>>
  */
 function qdb_build_app_translations_map(PDO $pdo): array {
-    $entries = qdb_app_ui_string_entries();
+    $entries = qdb_app_ui_string_entries_merged($pdo);
     $translations = qdb_load_translations_for_entries($pdo, $entries);
     $defaults = qdb_app_string_catalog()['germanDefaults'] ?? [];
     $result = [];
@@ -1397,7 +1655,7 @@ function qdb_export_translations_bundle(PDO $pdo): array {
     qdb_ensure_source_language($pdo);
 
     $exportEntries = [];
-    $appEntries = qdb_app_ui_string_entries_for_website();
+    $appEntries = qdb_app_ui_string_entries_for_website($pdo);
     $appTranslations = qdb_load_translations_for_entries($pdo, $appEntries);
     qdb_attach_translation_texts($appEntries, $appTranslations);
     foreach ($appEntries as $e) {

data/app_ui_strings.json

@@ -1,6 +1,6 @@
 {
     "version": 2,
-  "description": "Coach-visible app UI strings only (excludes dev settings / database tools).",
+    "description": "Coach-visible app UI strings only (excludes dev settings \/ database tools).",
     "keys": [
         "all_clients",
         "answer",
@@ -43,12 +43,6 @@
         "locked",
         "questionnaire_chip_edit",
         "questionnaire_chip_edit_pending",
-    "questionnaire_group_closure",
-    "questionnaire_group_consultation",
-    "questionnaire_group_demographics",
-    "questionnaire_group_followup",
-    "questionnaire_group_health_interview",
-    "questionnaire_group_integration",
         "login_btn",
         "login_failed_with_reason",
         "login_required",
@@ -140,12 +134,6 @@
         "locked": "Gesperrt",
         "questionnaire_chip_edit": "Bearbeiten",
         "questionnaire_chip_edit_pending": "Bearbeiten · Upload ausstehend",
-    "questionnaire_group_closure": "Abschluss",
-    "questionnaire_group_consultation": "Beratung",
-    "questionnaire_group_demographics": "Demografie",
-    "questionnaire_group_followup": "Nachbefragung",
-    "questionnaire_group_health_interview": "Gesundheitsinterview",
-    "questionnaire_group_integration": "Integration (IPL)",
         "login_btn": "Login",
         "login_failed_with_reason": "Login fehlgeschlagen: {reason}",
         "login_required": "Bitte zuerst einloggen",
@@ -193,6 +181,7 @@
         "upload_prepare_failed": "Es wurde nichts hochgeladen. Die Daten konnten nicht für den Upload vorbereitet werden. Bitte erneut synchronisieren oder den Support kontaktieren.",
         "upload_success_message": "Hochladen: {count} erledigt.",
         "username_hint": "Benutzername",
-    "year": "Jahr"
+        "year": "Jahr",
+        "questionnaire_group_demographics": "Demografie"
     }
 }

docs/android-questionnaire-api.md

@@ -149,7 +149,7 @@ Fields:
 - `name`: display/admin name.
 - `showPoints`: whether the app may show the points result.
 - `condition`: JSON condition object. Empty conditions are returned as `{}`.
-- `categoryKey` (optional): grouping key for the opening screen; labels come from app UI strings (e.g. `questionnaire_group_health_interview`).
+- `categoryKey` (optional): grouping key for the opening screen. The app resolves the section title as `questionnaire_group_<categoryKey>` (global app UI strings). Keys in use appear automatically on the website **Translations** page; default German text may come from `data/app_ui_strings.json` (`germanDefaults`). Unused translation rows can be removed from the questionnaires dashboard.
 
 Only questionnaires with `state = "active"` are returned, ordered by server `orderIndex`.
 

handlers/questionnaires.php

@@ -35,8 +35,9 @@ case 'GET':
             $r['conditionJson'] = $r['conditionJson'] ?: '{}';
         }
         unset($r);
+        $categoryKeys = qdb_list_category_keys_for_dashboard($pdo);
         qdb_discard($tmpDb, $lockFp);
-        json_success(['questionnaires' => $rows]);
+        json_success(['questionnaires' => $rows, 'categoryKeys' => $categoryKeys]);
     } catch (Throwable $e) {
         qdb_discard($tmpDb, $lockFp);
         error_log('questionnaires GET: ' . $e->getMessage());
@@ -48,6 +49,44 @@ case 'POST':
     require_role(['admin', 'supervisor'], $tokenRec);
     $body = read_json_body();
 
+    if (($body['action'] ?? '') === 'updateCategoryLabel') {
+        $categoryKey = trim((string)($body['categoryKey'] ?? ''));
+        $germanLabel = (string)($body['germanLabel'] ?? '');
+        [$pdo, $tmpDb, $lockFp] = qdb_open(true);
+        try {
+            $stringKey = qdb_set_category_german_label($pdo, $categoryKey, $germanLabel);
+            qdb_save($tmpDb, $lockFp);
+            json_success([
+                'categoryKey'  => $categoryKey,
+                'stringKey'    => $stringKey,
+                'germanLabel'  => trim($germanLabel),
+            ]);
+        } catch (Throwable $e) {
+            qdb_discard($tmpDb, $lockFp);
+            error_log('updateCategoryLabel: ' . $e->getMessage());
+            json_error('SERVER_ERROR', 'Server error', 500);
+        }
+        break;
+    }
+
+    if (($body['action'] ?? '') === 'deleteCategoryKey') {
+        $categoryKey = trim((string)($body['categoryKey'] ?? ''));
+        if ($categoryKey === '') {
+            json_error('INVALID_FIELD', 'categoryKey is required', 400);
+        }
+        [$pdo, $tmpDb, $lockFp] = qdb_open(true);
+        try {
+            $cleared = qdb_delete_category_key($pdo, $categoryKey);
+            qdb_save($tmpDb, $lockFp);
+            json_success(['deleted' => $categoryKey, 'questionnairesCleared' => $cleared]);
+        } catch (Throwable $e) {
+            qdb_discard($tmpDb, $lockFp);
+            error_log('deleteCategoryKey: ' . $e->getMessage());
+            json_error('SERVER_ERROR', 'Server error', 500);
+        }
+        break;
+    }
+
     if (($body['action'] ?? '') === 'importBundle') {
         $bundle = $body['bundle'] ?? null;
         if (!is_array($bundle)) {
@@ -86,6 +125,9 @@ case 'POST':
             $order = (int)$pdo->query("SELECT COALESCE(MAX(orderIndex),0)+1 FROM questionnaire")->fetchColumn();
         }
         $catKey = trim($body['categoryKey'] ?? '');
+        if ($catKey !== '') {
+            $catKey = qdb_normalize_stable_key($catKey);
+        }
         $pdo->prepare("INSERT INTO questionnaire (questionnaireID, name, version, state, orderIndex, showPoints, conditionJson, categoryKey)
                         VALUES (:id, :n, :v, :s, :o, :sp, :cj, :ck)")
             ->execute([':id' => $id, ':n' => $name, ':v' => $version, ':s' => $state,
@@ -129,6 +171,9 @@ case 'PUT':
         $catKey   = array_key_exists('categoryKey', $body)
             ? trim((string)$body['categoryKey'])
             : trim($row['categoryKey'] ?? '');
+        if ($catKey !== '') {
+            $catKey = qdb_normalize_stable_key($catKey);
+        }
 
         $pdo->prepare("UPDATE questionnaire SET name = :n, version = :v, state = :s,
                         orderIndex = :o, showPoints = :sp, conditionJson = :cj, categoryKey = :ck

handlers/translations.php

@@ -39,7 +39,7 @@ case 'GET':
             SELECT questionnaireID, name, orderIndex FROM questionnaire ORDER BY orderIndex
         ")->fetchAll(PDO::FETCH_ASSOC);
 
-        $appEntries = qdb_app_ui_string_entries_for_website();
+        $appEntries = qdb_app_ui_string_entries_for_website($pdo);
         $appTranslations = qdb_load_translations_for_entries($pdo, $appEntries);
         qdb_attach_translation_texts($appEntries, $appTranslations);
 

schema.sql

@@ -35,6 +35,13 @@ CREATE TABLE IF NOT EXISTS client (
     FOREIGN KEY(coachID) REFERENCES coach(coachID)
 );
 
+CREATE TABLE IF NOT EXISTS questionnaire_category (
+    categoryKey TEXT    NOT NULL PRIMARY KEY,
+    label       TEXT    NOT NULL DEFAULT '',
+    color       TEXT    NOT NULL DEFAULT '#64748b',
+    orderIndex  INTEGER NOT NULL DEFAULT 0
+);
+
 CREATE TABLE IF NOT EXISTS questionnaire (
     questionnaireID TEXT    NOT NULL PRIMARY KEY,
     name            TEXT    NOT NULL DEFAULT '',

website/css/style.css

@@ -342,12 +342,100 @@ code {
     gap: 8px;
 }
 
-/* Questionnaire card grid */
+/* Questionnaire dashboard root (not .q-grid — avoids grid layout on nested cards) */
+.q-dashboard-root {
+    display: block;
+    width: 100%;
+}
+
+/* Questionnaire dashboard — category sections with horizontal card rows */
+.q-dashboard-groups {
+    display: flex;
+    flex-direction: column;
+    gap: 28px;
+    width: 100%;
+}
+
+.q-category-group {
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
+    width: 100%;
+    min-width: 0;
+}
+
+.q-category-title {
+    margin: 0;
+    font-size: 1.05rem;
+    font-weight: 600;
+    color: var(--text-secondary);
+    letter-spacing: .02em;
+    padding-bottom: 4px;
+    border-bottom: 1px solid var(--border);
+}
+
+.q-category-title .category-title-input {
+    font: inherit;
+    color: inherit;
+    letter-spacing: inherit;
+    width: 100%;
+    max-width: 480px;
+}
+
+.category-german-input {
+    width: 100%;
+    min-width: 140px;
+    max-width: 320px;
+    padding: 6px 10px;
+    font-size: .9rem;
+    border: 1px solid var(--border);
+    border-radius: 6px;
+    background: var(--surface);
+    color: inherit;
+}
+
+.category-german-input:focus {
+    outline: none;
+    border-color: var(--primary);
+    box-shadow: 0 0 0 2px var(--primary-subtle);
+}
+
+.category-german-input:disabled {
+    opacity: .6;
+}
+
+/* Category rows: horizontal flow, wrap when the line is full */
+.q-category-grid {
+    display: flex;
+    flex-flow: row wrap;
+    align-items: stretch;
+    align-content: flex-start;
+    gap: 16px;
+    width: 100%;
+    min-width: 0;
+    margin: 0;
+}
+
+.q-category-grid > .q-card {
+    flex: 0 0 300px;
+    width: 300px;
+    max-width: 100%;
+    min-width: 0;
+    box-sizing: border-box;
+}
+
+/* Questionnaire card grid (legacy / other pages) */
 .q-grid {
     display: grid;
     grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
     gap: 16px;
 }
+
+.q-card .drag-handle {
+    margin-right: 6px;
+    cursor: grab;
+    color: var(--text-secondary);
+}
 .q-card {
     background: var(--surface);
     border: 1px solid var(--border);
@@ -751,12 +839,27 @@ th.sort-desc::after { content: ' \2193'; opacity: 1; }
     .q-grid { grid-template-columns: 1fr; }
 }
 
+@media (max-width: 520px) {
+    .q-category-grid > .q-card {
+        flex: 1 1 100%;
+        width: 100%;
+    }
+}
+
 /* Role badges */
 .badge-admin      { background: var(--badge-admin-bg); color: var(--badge-admin-fg); }
 .badge-supervisor { background: var(--badge-supervisor-bg); color: var(--badge-supervisor-fg); }
 .badge-coach      { background: var(--badge-coach-bg); color: var(--badge-coach-fg); }
 .badge-you        { background: var(--badge-you-bg); color: var(--badge-you-fg); font-size: .7rem; }
 
+/* Dashboard — category keys panel */
+.category-keys-table code {
+    font-size: .8rem;
+}
+table.data-table tbody tr.row-orphan-category td {
+    background: color-mix(in srgb, var(--surface-hover) 60%, transparent);
+}
+
 /* Assignment page — client table sized to rows (max 50); coach panel matches */
 .assign-page {
     display: flex;

website/js/pages/dashboard.js

@@ -9,7 +9,8 @@ export async function dashboardPage() {
             <h1>Questionnaires</h1>
             <div class="actions" id="headerActions"></div>
         </div>
-        <div id="qGrid" class="q-grid"><div class="spinner"></div></div>
+        <div id="qGrid" class="q-dashboard-root"><div class="spinner"></div></div>
+        <div id="categoryKeysPanel"></div>
     `;
 
     if (canEdit()) {
@@ -23,35 +24,216 @@ export async function dashboardPage() {
 
     try {
         const data = await apiGet('questionnaires.php');
-        renderGrid(data.questionnaires || []);
+        const categoryKeys = data.categoryKeys || [];
+        renderGrid(data.questionnaires || [], categoryKeys);
+        renderCategoryKeysPanel(categoryKeys);
+        bindCategoryLabelEditors();
     } catch (e) {
         showToast(e.message, 'error');
         document.getElementById('qGrid').innerHTML = `<p class="error-text">${e.message}</p>`;
     }
 }
 
-function renderGrid(questionnaires) {
+function renderCategoryKeysPanel(categoryKeys) {
-    const grid = document.getElementById('qGrid');
+    const panel = document.getElementById('categoryKeysPanel');
+    if (!panel) return;
 
-    if (!questionnaires.length) {
+    if (!canEdit()) {
-        grid.innerHTML = `
+        panel.innerHTML = '';
-            <div class="empty-state" style="grid-column:1/-1">
-                <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M9 12h6m-3-3v6m-7 4h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z"/></svg>
-                <h3>No questionnaires yet</h3>
-                <p>Create your first questionnaire to get started.</p>
-            </div>
-        `;
         return;
     }
 
-    grid.innerHTML = questionnaires.map(q => {
+    if (!categoryKeys.length) {
+        panel.innerHTML = `
+            <div class="card category-keys-card" style="margin-top:16px">
+                <h3 style="margin:0 0 8px;font-size:1rem">Category keys</h3>
+                <p class="data-toolbar-hint" style="margin:0">
+                    Set a category key on a questionnaire (editor → settings) to group it on the app opening screen.
+                    German group titles can be edited below once a key is in use.
+                </p>
+            </div>`;
+        return;
+    }
+
+    panel.innerHTML = `
+        <div class="card category-keys-card" style="margin-top:16px">
+            <h3 style="margin:0 0 8px;font-size:1rem">Category keys</h3>
+            <p class="data-toolbar-hint" style="margin:0 0 12px">
+                German labels for the app opening screen. Other languages: <a href="#/translations">Translations</a>.
+                Delete removes the key from questionnaires, all translations, and catalog defaults.
+            </p>
+            <div class="table-wrapper" style="max-height:none">
+                <table class="data-table category-keys-table">
+                    <thead>
+                        <tr>
+                            <th>Category key</th>
+                            <th>App string key</th>
+                            <th>German label</th>
+                            <th>Questionnaires</th>
+                            <th></th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        ${categoryKeys.map(row => `
+                            <tr class="${row.orphaned ? 'row-orphan-category' : ''}">
+                                <td><code>${esc(row.categoryKey)}</code></td>
+                                <td><code class="data-toolbar-hint">${esc(row.stringKey)}</code></td>
+                                <td class="category-label-cell">
+                                    <input type="text" class="category-german-input"
+                                        data-category-key="${esc(row.categoryKey)}"
+                                        value="${esc(row.germanLabel || '')}"
+                                        placeholder="German label"
+                                        aria-label="German label for ${esc(row.categoryKey)}">
+                                </td>
+                                <td>${row.orphaned
+                                    ? '<span class="data-toolbar-hint">unused</span>'
+                                    : esc(String(row.questionnaireCount))}</td>
+                                <td style="text-align:right;white-space:nowrap">
+                                    <button type="button" class="btn btn-sm btn-danger delete-cat-key-btn"
+                                        data-key="${esc(row.categoryKey)}"
+                                        data-count="${row.questionnaireCount}">Delete</button>
+                                </td>
+                            </tr>
+                        `).join('')}
+                    </tbody>
+                </table>
+            </div>
+        </div>`;
+
+    panel.querySelectorAll('.delete-cat-key-btn').forEach(btn => {
+        btn.addEventListener('click', async (e) => {
+            e.stopPropagation();
+            const key = btn.dataset.key;
+            const count = parseInt(btn.dataset.count || '0', 10);
+            let msg = `Delete category key "${key}"?\n\nThis removes all translations and catalog defaults for questionnaire_group_${key}.`;
+            if (count > 0) {
+                msg += `\n\n${count} questionnaire(s) will have their category key cleared.`;
+            }
+            if (!confirm(msg)) return;
+            btn.disabled = true;
+            try {
+                const result = await apiPost('questionnaires.php', { action: 'deleteCategoryKey', categoryKey: key });
+                const cleared = result.questionnairesCleared ?? count;
+                showToast(
+                    cleared
+                        ? `Deleted "${key}" and cleared ${cleared} questionnaire(s)`
+                        : `Deleted "${key}"`,
+                    'success'
+                );
+                await dashboardPage();
+            } catch (err) {
+                showToast(err.message, 'error');
+                btn.disabled = false;
+            }
+        });
+    });
+}
+
+function categoryGermanInputHTML(categoryKey, label) {
+    if (!canEdit() || !categoryKey) {
+        return esc(label);
+    }
+    return `<input type="text" class="category-german-input category-title-input"
+        data-category-key="${esc(categoryKey)}"
+        value="${esc(label)}"
+        aria-label="German category title">`;
+}
+
+function bindCategoryLabelEditors() {
+    if (!canEdit()) return;
+
+    document.querySelectorAll('.category-german-input').forEach(input => {
+        input.dataset.lastSaved = input.value.trim();
+
+        input.addEventListener('keydown', (e) => {
+            if (e.key === 'Enter') {
+                e.preventDefault();
+                input.blur();
+            }
+        });
+
+        input.addEventListener('blur', () => saveCategoryGermanLabel(input));
+    });
+}
+
+async function saveCategoryGermanLabel(input) {
+    const categoryKey = input.dataset.categoryKey?.trim();
+    const label = input.value.trim();
+    if (!categoryKey) return;
+
+    const prev = input.dataset.lastSaved ?? '';
+    if (label === prev) return;
+
+    if (!label) {
+        showToast('German label cannot be empty', 'error');
+        input.value = prev;
+        return;
+    }
+
+    input.disabled = true;
+    try {
+        await apiPost('questionnaires.php', {
+            action: 'updateCategoryLabel',
+            categoryKey,
+            germanLabel: label,
+        });
+        input.dataset.lastSaved = label;
+        syncCategoryGermanInputs(categoryKey, label);
+        showToast('Category label saved', 'success');
+    } catch (err) {
+        showToast(err.message, 'error');
+        input.value = prev;
+    } finally {
+        input.disabled = false;
+    }
+}
+
+function syncCategoryGermanInputs(categoryKey, label) {
+    document.querySelectorAll('.category-german-input').forEach(el => {
+        if (el.dataset.categoryKey === categoryKey) {
+            el.value = label;
+            el.dataset.lastSaved = label;
+        }
+    });
+}
+
+const UNCATEGORIZED = '__uncategorized__';
+
+function groupQuestionnairesByCategory(questionnaires, categoryKeys) {
+    const labelByKey = Object.fromEntries(
+        (categoryKeys || [])
+            .filter(r => !r.orphaned)
+            .map(r => [r.categoryKey, r.germanLabel || r.categoryKey])
+    );
+
+    const sorted = [...questionnaires].sort((a, b) => (a.orderIndex ?? 0) - (b.orderIndex ?? 0));
+    const buckets = new Map();
+
+    for (const q of sorted) {
+        const key = (q.categoryKey || '').trim() || UNCATEGORIZED;
+        if (!buckets.has(key)) buckets.set(key, []);
+        buckets.get(key).push(q);
+    }
+
+    const sections = [...buckets.entries()].map(([key, items]) => ({
+        categoryKey: key === UNCATEGORIZED ? '' : key,
+        title: key === UNCATEGORIZED ? 'Uncategorized' : (labelByKey[key] || key),
+        items,
+        sortKey: Math.min(...items.map(q => q.orderIndex ?? 0)),
+    }));
+
+    sections.sort((a, b) => a.sortKey - b.sortKey);
+    return sections;
+}
+
+function renderQuestionnaireCard(q) {
     const stateClass = `badge-${(q.state || 'draft').toLowerCase().replace(/\s+/g, '_')}`;
     const showPts = parseInt(q.showPoints || 0, 10);
     return `
         <div class="q-card" data-id="${q.questionnaireID}" draggable="${canEdit()}">
             <div class="q-card-header">
                 <div class="q-card-title">
-                    ${canEdit() ? '<span class="drag-handle" title="Drag to reorder" style="margin-right:6px;cursor:grab;color:var(--text-secondary)">&#x2630;</span>' : ''}
+                    ${canEdit() ? '<span class="drag-handle" title="Drag to reorder" aria-label="Drag to reorder">&#x2630;</span>' : ''}
                     ${esc(q.name)}
                 </div>
                 <span class="badge ${stateClass}">${esc(q.state || 'draft')}</span>
@@ -67,9 +249,36 @@ function renderGrid(questionnaires) {
                 <a href="#/questionnaire/${q.questionnaireID}/results" class="btn btn-sm">Results</a>
                 ${getRole() === 'admin' ? `<button class="btn btn-sm btn-danger delete-q-btn" data-id="${q.questionnaireID}">Delete</button>` : ''}
             </div>
+        </div>`;
+}
+
+function renderGrid(questionnaires, categoryKeys = []) {
+    const grid = document.getElementById('qGrid');
+
+    if (!questionnaires.length) {
+        grid.innerHTML = `
+            <div class="empty-state">
+                <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M9 12h6m-3-3v6m-7 4h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z"/></svg>
+                <h3>No questionnaires yet</h3>
+                <p>Create your first questionnaire to get started.</p>
             </div>
         `;
-    }).join('');
+        return;
+    }
+
+    const sections = groupQuestionnairesByCategory(questionnaires, categoryKeys);
+
+    grid.innerHTML = `
+        <div class="q-dashboard-groups">
+            ${sections.map(section => `
+                <section class="q-category-group" data-category="${esc(section.categoryKey)}">
+                    <h2 class="q-category-title">${categoryGermanInputHTML(section.categoryKey, section.title)}</h2>
+                    <div class="q-category-grid">
+                        ${section.items.map(q => renderQuestionnaireCard(q)).join('')}
+                    </div>
+                </section>
+            `).join('')}
+        </div>`;
 
     grid.querySelectorAll('.q-card').forEach(card => {
         card.addEventListener('click', (e) => {
@@ -95,49 +304,67 @@ function renderGrid(questionnaires) {
     if (canEdit()) initGridDrag(questionnaires);
 }
 
-function initGridDrag(questionnaires) {
+function collectDashboardCardOrder() {
-    const grid = document.getElementById('qGrid');
+    const ids = [];
-    if (!grid) return;
+    document.querySelectorAll('.q-category-group').forEach(section => {
-    let dragItem = null;
+        section.querySelectorAll('.q-category-grid .q-card').forEach(card => {
+            ids.push(card.dataset.id);
+        });
+    });
+    return ids;
+}
 
-    grid.addEventListener('dragstart', (e) => {
+function initGridDrag(questionnaires) {
+    const root = document.getElementById('qGrid');
+    if (!root) return;
+    let dragItem = null;
+    let dragRow = null;
+
+    root.addEventListener('dragstart', (e) => {
         const card = e.target.closest('.q-card');
         if (!card || !e.target.closest('.drag-handle')) { e.preventDefault(); return; }
         dragItem = card;
+        dragRow = card.closest('.q-category-grid');
         card.style.opacity = '0.5';
         e.dataTransfer.effectAllowed = 'move';
     });
 
-    grid.addEventListener('dragover', (e) => {
+    root.addEventListener('dragover', (e) => {
         e.preventDefault();
-        if (!dragItem) return;
+        if (!dragItem || !dragRow) return;
-        const cards = [...grid.querySelectorAll('.q-card:not([style*="opacity"])')];
-        const afterCard = cards.reduce((closest, child) => {
-            const box = child.getBoundingClientRect();
-            const offset = e.clientY - box.top - box.height / 2;
-            if (offset < 0 && offset > closest.offset) return { offset, element: child };
-            return closest;
-        }, { offset: Number.NEGATIVE_INFINITY }).element;
 
-        if (afterCard) grid.insertBefore(dragItem, afterCard);
+        const row = e.target.closest('.q-category-grid');
-        else grid.appendChild(dragItem);
+        if (!row || row !== dragRow) return;
+
+        const cards = [...row.querySelectorAll('.q-card')].filter(c => c !== dragItem);
+        let insertBefore = null;
+        for (const child of cards) {
+            const box = child.getBoundingClientRect();
+            if (e.clientX < box.left + box.width / 2) {
+                insertBefore = child;
+                break;
+            }
+        }
+        if (insertBefore) row.insertBefore(dragItem, insertBefore);
+        else row.appendChild(dragItem);
     });
 
-    grid.addEventListener('dragend', async () => {
+    root.addEventListener('dragend', async () => {
         if (!dragItem) return;
         dragItem.style.opacity = '';
-        const newOrder = [...grid.querySelectorAll('.q-card')].map(el => el.dataset.id);
+        const newOrder = collectDashboardCardOrder();
         dragItem = null;
+        dragRow = null;
 
         for (let i = 0; i < newOrder.length; i++) {
             const id = newOrder[i];
-            const q = questionnaires.find(q => q.questionnaireID === id);
+            const q = questionnaires.find(x => x.questionnaireID === id);
             if (q && parseInt(q.orderIndex, 10) !== i) {
                 try {
                     await apiPut('questionnaires.php', { questionnaireID: id, orderIndex: i });
                     q.orderIndex = i;
-                } catch (e) {
+                } catch (err) {
-                    showToast(e.message, 'error');
+                    showToast(err.message, 'error');
                     return;
                 }
             }