diff --git a/finance/app/routers/gui.py b/finance/app/routers/gui.py
index ad10a97..80b8213 100644
--- a/finance/app/routers/gui.py
+++ b/finance/app/routers/gui.py
@@ -62,6 +62,28 @@ def _latest_projection(session: Session) -> ProjectionResult | None:
     ).scalars().first()
 
 
+def _opt_int(value: str | None) -> int | None:
+    """Wandelt einen GUI-Query-Parameter tolerant in int|None um. HTML-Formulare
+    senden bei nicht ausgefüllten Feldern leere Strings statt gar keinen
+    Parameter - das darf nie zu einem 422 fuehren, sondern degradiert zu None."""
+    if value is None or not value.strip():
+        return None
+    try:
+        return int(value)
+    except ValueError:
+        return None
+
+
+def _opt_date(value: str | None) -> date | None:
+    """Wie _opt_int, nur fuer date-Felder (ISO-Format aus <input type=date>)."""
+    if value is None or not value.strip():
+        return None
+    try:
+        return date.fromisoformat(value)
+    except ValueError:
+        return None
+
+
 @router.get("/", dependencies=[Depends(gui_session)])
 def index(request: Request, session: Session = Depends(get_session)):
     accounts = session.execute(select(Account)).scalars().all()
@@ -77,15 +99,23 @@ def index(request: Request, session: Session = Depends(get_session)):
 @router.get("/buchungen", dependencies=[Depends(gui_session)])
 def buchungen(
     request: Request,
-    account_id: int | None = None,
-    date_from: date | None = None,
-    date_to: date | None = None,
-    category_id: int | None = None,
+    account_id: str | None = None,
+    date_from: str | None = None,
+    date_to: str | None = None,
+    category_id: str | None = None,
     q: str | None = None,
     status: str = "confirmed",
     page: int = 1,
     session: Session = Depends(get_session),
 ):
+    # HTML-Filterformular sendet leere Strings fuer nicht ausgefuellte Felder -
+    # daher hier bewusst str|None statt int|None/date|None und tolerante
+    # Konvertierung, statt FastAPI vor dem Handler mit 422 abbrechen zu lassen.
+    # Die API-Routen (/api/transactions) bleiben strikt typisiert.
+    account_id = _opt_int(account_id)
+    date_from = _opt_date(date_from)
+    date_to = _opt_date(date_to)
+    category_id = _opt_int(category_id)
     page = max(1, page)
     total = count_transactions(
         account_id=account_id,
diff --git a/finance/app/static/style.css b/finance/app/static/style.css
index b6fdc8b..9d8c603 100644
--- a/finance/app/static/style.css
+++ b/finance/app/static/style.css
@@ -16,6 +16,10 @@ nav {
   border-bottom: 1px solid #ccc;
   padding-bottom: 0.5rem;
   margin-bottom: 1rem;
+  position: sticky;
+  top: 0;
+  z-index: 10;
+  background: #fff;
 }
 
 nav a {
@@ -102,6 +106,11 @@ button {
   cursor: pointer;
 }
 
+button:disabled {
+  opacity: 0.45;
+  cursor: not-allowed;
+}
+
 .badge {
   display: inline-block;
   padding: 0.15rem 0.6rem;
diff --git a/finance/app/templates/_import_list.html b/finance/app/templates/_import_list.html
index 1b1c525..6e302e9 100644
--- a/finance/app/templates/_import_list.html
+++ b/finance/app/templates/_import_list.html
@@ -39,19 +39,24 @@
               hx-on::after-request="if(event.detail.successful){htmx.trigger(document.getElementById('imports'), 'refresh')}">
           <button type="submit">Verwerfen</button>
         </form>
+        <button type="button" class="inline-form" disabled title="Nur für bestätigte Importe">Import zurückrollen</button>
         {% elif s.status == "confirmed" %}
         <span class="muted">Bestätigt — Buchungen übernommen</span>
+        <button type="button" class="inline-form" disabled title="Nur für Entwürfe">Übernehmen</button>
+        <button type="button" class="inline-form" disabled title="Nur für Entwürfe">Verwerfen</button>
         <form class="inline-form" hx-post="/api/imports/{{ s.id }}/rollback" hx-swap="none"
               hx-confirm="Diesen Import und ALLE zugehörigen Buchungen unwiderruflich löschen? Salden und Projektionen ändern sich."
               hx-on::after-request="if(event.detail.successful){htmx.trigger(document.getElementById('imports'), 'refresh')}">
           <button type="submit">Import zurückrollen</button>
         </form>
         {% else %}
+        <button type="button" class="inline-form" disabled title="Nur für Entwürfe">Übernehmen</button>
         <form class="inline-form" hx-delete="/api/imports/{{ s.id }}" hx-swap="none"
               hx-confirm="Import „{{ s.filename }}“ wirklich verwerfen?"
               hx-on::after-request="if(event.detail.successful){htmx.trigger(document.getElementById('imports'), 'refresh')}">
           <button type="submit">Verwerfen</button>
         </form>
+        <button type="button" class="inline-form" disabled title="Nur für bestätigte Importe">Import zurückrollen</button>
         {% endif %}
       </td>
     </tr>
diff --git a/finance/app/templates/planning.html b/finance/app/templates/planning.html
index b80d47e..2877281 100644
--- a/finance/app/templates/planning.html
+++ b/finance/app/templates/planning.html
@@ -53,9 +53,9 @@
     </form>
   </fieldset>
 
-  {% if suggestions %}
   <fieldset>
     <legend>Vorschläge aus Buchungen</legend>
+    {% if suggestions %}
     <table>
       <thead>
         <tr><th>Name</th><th>Betrag</th><th>Rhythmus</th><th>Fälligkeitstag</th><th></th></tr>
@@ -82,8 +82,10 @@
         {% endfor %}
       </tbody>
     </table>
+    {% else %}
+    <p class="muted">Keine Vorschläge — erkannt werden Serien aus mindestens 3 Monaten gleichartiger Buchungen.</p>
+    {% endif %}
   </fieldset>
-  {% endif %}
 </section>
 
 <section class="planning-section">
diff --git a/finance/tests/test_gui.py b/finance/tests/test_gui.py
index 577946f..407af09 100644
--- a/finance/tests/test_gui.py
+++ b/finance/tests/test_gui.py
@@ -78,6 +78,46 @@ def test_buchungen_pagination(client, db):
     assert "MARKER51" in r2.text
 
 
+def test_buchungen_empty_filter_fields_no_422(client):
+    # HTML-Formulare senden bei nicht ausgefüllten Feldern leere Strings, nicht
+    # "kein Parameter" — die GUI-Route muss das tolerant behandeln statt mit
+    # einem rohen 422 zu scheitern.
+    client.post("/login", data={"username": "admin", "password": "geheim"})
+    r = client.get(
+        "/buchungen"
+        "?account_id=2&date_from=&date_to=&category_id=&q=&status=confirmed"
+    )
+    assert r.status_code == 200
+
+
+def test_buchungen_filled_filters_scope_to_account(client, db):
+    from app.models.tables import Account, Transaction
+
+    acc_a = Account(bank="dkb", iban="DE01", name="Konto A", type="giro")
+    acc_b = Account(bank="dkb", iban="DE02", name="Konto B", type="giro")
+    db.add_all([acc_a, acc_b])
+    db.flush()
+    db.add(Transaction(
+        account_id=acc_a.id, booking_date=date(2026, 6, 15),
+        amount=Decimal("10.00"), purpose="MARKER-A", counterparty="X",
+        status="confirmed", dedup_hash="hash-a",
+    ))
+    db.add(Transaction(
+        account_id=acc_b.id, booking_date=date(2026, 6, 15),
+        amount=Decimal("20.00"), purpose="MARKER-B", counterparty="Y",
+        status="confirmed", dedup_hash="hash-b",
+    ))
+    db.commit()
+
+    client.post("/login", data={"username": "admin", "password": "geheim"})
+    r = client.get(
+        f"/buchungen?account_id={acc_a.id}&date_from=2026-06-01&date_to=2026-06-30"
+    )
+    assert r.status_code == 200
+    assert "MARKER-A" in r.text
+    assert "MARKER-B" not in r.text
+
+
 def test_planning_page_has_all_sections(client):
     client.post("/login", data={"username": "admin", "password": "geheim"})
     r = client.get("/planung")