feat: Implement sorting and categorization for activity profile schema rows

- Introduced a new sorting mechanism for activity profile schema rows based on defined categories and UI groups, enhancing the organization of displayed metrics.
- Added constants for training parameter categories and their German labels to improve clarity in the UI.
- Refactored the `SessionMetricsFields` component to utilize the new sorting logic, replacing the previous mapping approach for better maintainability and user experience.
- Ensured that orphan metrics are sorted correctly for consistent display alongside the main metrics.

frontend/src/pages/ActivityPage.jsx

@@ -123,6 +123,50 @@ function activitySchemaHeadlineBinding(s) {
   return null
 }
 
+/** training_parameters.category (siehe Migration 013); feste Reihenfolge der Wertegruppen */
+const TRAINING_PARAM_CATEGORY_ORDER = [
+  'physical',
+  'physiological',
+  'performance',
+  'subjective',
+  'environmental',
+]
+
+const TRAINING_PARAM_CATEGORY_LABEL_DE = {
+  physical: 'Physisch / Bewegung',
+  physiological: 'Physiologie',
+  performance: 'Leistung',
+  subjective: 'Subjektiv und Wahrnehmung',
+  environmental: 'Umwelt',
+}
+
+function compareActivityProfileSchemaRows(a, b) {
+  const ca = (a.param_category && String(a.param_category).trim().toLowerCase()) || ''
+  const cb = (b.param_category && String(b.param_category).trim().toLowerCase()) || ''
+  const ia = TRAINING_PARAM_CATEGORY_ORDER.indexOf(ca)
+  const ib = TRAINING_PARAM_CATEGORY_ORDER.indexOf(cb)
+  const ra = ia === -1 ? 1000 : ia
+  const rb = ib === -1 ? 1000 : ib
+  if (ra !== rb) return ra - rb
+  if (ca !== cb) return ca.localeCompare(cb, 'de')
+
+  const ga = (a.ui_group && String(a.ui_group).trim()) || ''
+  const gb = (b.ui_group && String(b.ui_group).trim()) || ''
+  if (ga !== gb) {
+    if (!ga) return -1
+    if (!gb) return 1
+    return ga.localeCompare(gb, 'de')
+  }
+  const sa = Number(a.sort_order) || 0
+  const sb = Number(b.sort_order) || 0
+  if (sa !== sb) return sa - sb
+  return String(a.key).localeCompare(String(b.key), 'de')
+}
+
+function sortActivityProfileSchemaRows(rows) {
+  return [...rows].sort(compareActivityProfileSchemaRows)
+}
+
 function empty() {
   return {
     date: dayjs().format('YYYY-MM-DD'),
@@ -189,42 +233,94 @@ function SessionMetricsFields({ schema, values, setValues, metrics }) {
 
   if (schemaForDisplay.length === 0 && orphanMetrics.length === 0) return null
   const set = (k, v) => setValues((prev) => ({ ...prev, [k]: v }))
+
+  const sortedForDisplay = sortActivityProfileSchemaRows(schemaForDisplay)
+  const profileFieldNodes = []
+  let lastCategoryKey = null
+  let lastUiGroup = null
+  for (const s of sortedForDisplay) {
+    const catRaw = (s.param_category && String(s.param_category).trim().toLowerCase()) || ''
+    const catKey = catRaw || '_other'
+    if (catKey !== lastCategoryKey) {
+      lastCategoryKey = catKey
+      lastUiGroup = null
+      const catTitle =
+        (catRaw && TRAINING_PARAM_CATEGORY_LABEL_DE[catRaw]) || s.param_category || 'Sonstige'
+      profileFieldNodes.push(
+        <div
+          key={`prof-cat-${catKey}-${profileFieldNodes.length}`}
+          style={{
+            fontSize: 12,
+            fontWeight: 700,
+            color: 'var(--text2)',
+            marginTop: profileFieldNodes.length ? 14 : 6,
+            marginBottom: 6,
+            letterSpacing: '0.02em',
+          }}
+        >
+          {catTitle}
+        </div>,
+      )
+    }
+    const ug = (s.ui_group && String(s.ui_group).trim()) || ''
+    if (ug) {
+      if (ug !== lastUiGroup) {
+        lastUiGroup = ug
+        profileFieldNodes.push(
+          <div
+            key={`prof-ug-${catKey}-${ug}-${profileFieldNodes.length}`}
+            style={{ fontSize: 12, color: 'var(--text3)', marginTop: 8, marginBottom: 4 }}
+          >
+            {ug}
+          </div>,
+        )
+      }
+    } else {
+      lastUiGroup = null
+    }
+    profileFieldNodes.push(
+      <div key={s.key} className="form-row">
+        <label className="form-label">
+          {s.name_de}
+          {s.required ? ' *' : ''}
+          {s.unit ? ` (${s.unit})` : ''}
+        </label>
+        {s.data_type === 'boolean' ? (
+          <input
+            type="checkbox"
+            style={{ width: 'auto', marginRight: 'auto' }}
+            checked={!!values[s.key]}
+            onChange={(e) => set(s.key, e.target.checked)}
+          />
+        ) : s.data_type === 'integer' || s.data_type === 'float' ? (
+          <input
+            type="number"
+            className="form-input"
+            step={s.data_type === 'integer' ? 1 : 'any'}
+            value={values[s.key] ?? ''}
+            onChange={(e) => set(s.key, e.target.value)}
+          />
+        ) : (
+          <input
+            type="text"
+            className="form-input"
+            value={values[s.key] ?? ''}
+            onChange={(e) => set(s.key, e.target.value)}
+          />
+        )}
+        <span className="form-unit" />
+      </div>,
+    )
+  }
+
+  const orphansSorted = [...orphanMetrics].sort((a, b) =>
+    String(a.key).localeCompare(String(b.key), 'de'),
+  )
+
   return (
     <div style={{ marginTop: 12, paddingTop: 12, borderTop: '1px solid var(--border)' }}>
       <div style={{ fontSize: 13, fontWeight: 600, marginBottom: 8 }}>Weitere Kennwerte (Profil)</div>
-      {schemaForDisplay.map((s) => (
-        <div key={s.key} className="form-row">
-          <label className="form-label">
-            {s.name_de}
-            {s.required ? ' *' : ''}
-            {s.unit ? ` (${s.unit})` : ''}
-          </label>
-          {s.data_type === 'boolean' ? (
-            <input
-              type="checkbox"
-              style={{ width: 'auto', marginRight: 'auto' }}
-              checked={!!values[s.key]}
-              onChange={(e) => set(s.key, e.target.checked)}
-            />
-          ) : s.data_type === 'integer' || s.data_type === 'float' ? (
-            <input
-              type="number"
-              className="form-input"
-              step={s.data_type === 'integer' ? 1 : 'any'}
-              value={values[s.key] ?? ''}
-              onChange={(e) => set(s.key, e.target.value)}
-            />
-          ) : (
-            <input
-              type="text"
-              className="form-input"
-              value={values[s.key] ?? ''}
-              onChange={(e) => set(s.key, e.target.value)}
-            />
-          )}
-          <span className="form-unit" />
-        </div>
-      ))}
+      {profileFieldNodes}
       {orphanMetrics.length > 0 && (
         <div style={{ marginTop: 14 }}>
           <div style={{ fontSize: 12, color: 'var(--text3)', marginBottom: 8, lineHeight: 1.45 }}>
@@ -232,7 +328,7 @@ function SessionMetricsFields({ schema, values, setValues, metrics }) {
             in activity_log) nicht ins Schema passen — nur Anzeige. Sichtbar nach erneutem Laden, wenn die Daten in der
             Datenbank stehen.
           </div>
-          {orphanMetrics.map((row) => {
+          {orphansSorted.map((row) => {
             const disp =
               values[row.key] === null || values[row.key] === undefined || values[row.key] === ''
                 ? '—'