chore: increment version to 0.8.46 and update changelog

- Updated APP_VERSION to 0.8.46 and MODULE_VERSIONS for exercises to 2.15.1.
- Added structured logging for media upload conflicts in the backend.
- Removed explanatory media hints from the ExerciseFormPage in the frontend to streamline the user interface.

backend/routers/exercises.py

@@ -2186,6 +2186,20 @@ async def upload_exercise_media(
                         ),
                     )
                 elif lc in ("trash_soft", "trash_hidden"):
+                    logger.warning(
+                        "exercise_media_upload_conflict MEDIA_ASSET_IN_TRASH exercise_id=%s profile_id=%s "
+                        "media_asset_id=%s lifecycle_state=%s visibility=%s club_id=%s sha256_prefix=%s "
+                        "upload_filename=%s stored_original_filename=%s",
+                        exercise_id,
+                        profile_id,
+                        ea["id"],
+                        lc,
+                        ex_vis,
+                        ex_club,
+                        full_sha[:16],
+                        (file.filename or "")[:200],
+                        (ea.get("original_filename") or "")[:200],
+                    )
                     raise HTTPException(
                         status_code=409,
                         detail={
@@ -2200,6 +2214,17 @@ async def upload_exercise_media(
                         },
                     )
                 else:
+                    logger.warning(
+                        "exercise_media_upload_conflict MEDIA_ASSET_UNAVAILABLE exercise_id=%s profile_id=%s "
+                        "media_asset_id=%s lifecycle_state=%s visibility=%s club_id=%s sha256_prefix=%s",
+                        exercise_id,
+                        profile_id,
+                        ea["id"],
+                        lc,
+                        ex_vis,
+                        ex_club,
+                        full_sha[:16],
+                    )
                     raise HTTPException(
                         status_code=409,
                         detail={

backend/version.py

@@ -1,6 +1,6 @@
 # Shinkan Jinkendo Version Information
 
-APP_VERSION = "0.8.45"
+APP_VERSION = "0.8.46"
 BUILD_DATE = "2026-05-07"
 DB_SCHEMA_VERSION = "20260507045"
 
@@ -17,7 +17,7 @@ MODULE_VERSIONS = {
     "groups": "0.1.0",
     "skills": "0.1.0",
     "methods": "0.1.0",
-    "exercises": "2.15.0",  # Upload: 409 MEDIA_ASSET_IN_TRASH bei Papierkorb-Dedupe (SHA + visibility + club)
+    "exercises": "2.15.1",  # Upload 409: strukturiertes Logging
     "training_units": "0.2.0",
     "training_programs": "0.1.0",
     "planning": "0.8.1",  # Vorlagen Leseprüfung library_content_visible_to_profile
@@ -29,6 +29,14 @@ MODULE_VERSIONS = {
 }
 
 CHANGELOG = [
+    {
+        "version": "0.8.46",
+        "date": "2026-05-07",
+        "changes": [
+            "Übung Medien-Upload: bei 409-Konflikt (Papierkorb-Dedupe) logger.warning mit exercise_id, profile_id, media_asset_id, lifecycle, visibility, club_id, sha256_prefix, Dateinamen",
+            "ExerciseFormPage: erklärende Medien-Hinweistexte in GUI entfernt (Kurzbeschreibung + Archiv-Dialog)",
+        ],
+    },
     {
         "version": "0.8.45",
         "date": "2026-05-07",

frontend/src/pages/ExerciseFormPage.jsx

@@ -1390,8 +1390,7 @@ function ExerciseFormPage() {
         <div className="card" style={{ marginTop: '16px' }}>
           <h2 style={{ marginTop: 0, fontSize: '1.1rem' }}>Medien</h2>
           <p style={{ color: 'var(--text2)', fontSize: '13px' }}>
-            Datei oder Embed (YouTube, Vimeo, Instagram, TikTok). Max. 10 pro Übung. Archiv-Medien mehrfach nutzbar.
-            Papierkorb und Freigaben steuern Sie zentral im Archiv — hier nur Verknüpfung zur Übung.
+            Datei oder Embed (YouTube, Vimeo, Instagram, TikTok). Max. 10 pro Übung.
           </p>
           <div
             style={{
@@ -1405,9 +1404,6 @@ function ExerciseFormPage() {
             <button type="button" className="btn btn-secondary" onClick={() => setArchiveOpen(true)}>
               Aus Archiv verknüpfen…
             </button>
-            <span style={{ fontSize: '12px', color: 'var(--text3)' }}>
-              Sichtbare, bereits gespeicherte Dateien erneut nutzen (ein Speicherplatz, mehrere Übungen).
-            </span>
           </div>
           <div style={{ display: 'grid', gap: '12px', marginTop: '12px' }}>
             <div>
@@ -1529,18 +1525,6 @@ function ExerciseFormPage() {
                       (m.embed_url ? m.embed_url : '') ||
                       '—'}
                   </div>
-                  {m.media_asset_id &&
-                    String(m.asset_lifecycle_state || 'active').toLowerCase() === 'trash_soft' && (
-                      <p style={{ color: 'var(--danger)', margin: '8px 0 0', fontSize: '12px' }}>
-                        Hinweis: Dieses Archiv-Medium ist im Papierkorb (Stufe 1).
-                      </p>
-                    )}
-                  {m.media_asset_id &&
-                    String(m.asset_lifecycle_state || 'active').toLowerCase() === 'trash_hidden' && (
-                      <p style={{ color: 'var(--danger)', margin: '8px 0 0', fontSize: '12px' }}>
-                        Hinweis: Archiv-Medium ausgeblendet (Stufe 2) — in der Übungsansicht unsichtbar.
-                      </p>
-                    )}
                   <div className="form-row" style={{ marginTop: '8px', display: 'grid', gap: '8px' }}>
                     <input
                       type="text"
@@ -1627,9 +1611,6 @@ function ExerciseFormPage() {
                 onClick={(e) => e.stopPropagation()}
               >
                 <h3 style={{ marginTop: 0, fontSize: '1.05rem' }}>Medienarchiv</h3>
-                <p style={{ fontSize: '13px', color: 'var(--text2)', marginTop: 0 }}>
-                  Nur aktive Medien, die Sie lesen dürfen (offiziell, eigenes privat, Ihre Vereine).
-                </p>
                 <input
                   type="search"
                   className="form-input"