feat: extend inventory and administration workflows

src/ccma/domain/dates.py

@@ -117,18 +117,24 @@ def validate_member_dates(
     birth_date: str,
     accepted_at: str = "",
     membership_started_at: str = "",
+    membership_ended_at: str = "",
     today: date | None = None,
 ) -> None:
     reference = today or date.today()
     birth = validate_birth_date(birth_date, today=reference)
     accepted = _validate_not_future(accepted_at, "Aufnahmebeschluss", reference)
     started = _validate_not_future(membership_started_at, "Mitglied seit", reference)
+    ended = parse_iso_date(membership_ended_at, "Austrittsdatum")
     if birth and accepted and accepted < birth:
         raise DateValidationError("Aufnahmebeschluss darf nicht vor dem Geburtsdatum liegen.")
     if birth and started and started < birth:
         raise DateValidationError("Mitgliedschaft darf nicht vor dem Geburtsdatum beginnen.")
     if accepted and started and started < accepted:
         raise DateValidationError("Mitgliedschaft darf nicht vor dem Aufnahmebeschluss beginnen.")
+    if started and ended and ended < started:
+        raise DateValidationError("Austrittsdatum darf nicht vor dem Mitgliedschaftsbeginn liegen.")
+    if accepted and ended and ended < accepted:
+        raise DateValidationError("Austrittsdatum darf nicht vor dem Aufnahmebeschluss liegen.")
 
 
 def calculate_age(birth_date: date, on_date: date | None = None) -> int:

src/ccma/domain/models.py

@@ -27,6 +27,19 @@ ASSET_STATUS_LABELS = {
     "retired": "AUSGEMUSTERT",
 }
 
+ASSET_OWNER_TYPE_LABELS = {
+    "club": "VEREIN",
+    "member": "MITGLIED",
+    "external": "EXTERN",
+}
+
+ASSET_CUSTODY_TYPE_LABELS = {
+    "club": "VEREIN",
+    "member": "MITGLIED",
+    "external": "EXTERN",
+    "unknown": "UNBEKANNT",
+}
+
 HOUSEKEEPER_MEMBER_FIELD_LABELS = {
     "nickname": "Nickname",
     "email": "E-Mail-Adresse",
@@ -77,6 +90,7 @@ class Member:
     status: str = "application"
     accepted_at: str = ""
     membership_started_at: str = ""
+    membership_ended_at: str = ""
     payment_frequency: str = "annual"
     contribution_rule_id: str = "standard-2022"
     honorary: bool = False
@@ -122,6 +136,7 @@ class Member:
                 "status": self.status,
                 "accepted_at": self.accepted_at,
                 "started_at": self.membership_started_at,
+                "ended_at": self.membership_ended_at,
                 "honorary": self.honorary,
             },
             "contribution_profile": {
@@ -165,6 +180,7 @@ class Member:
             status=str(membership.get("status", "application")),
             accepted_at=str(membership.get("accepted_at", "")),
             membership_started_at=str(membership.get("started_at", "")),
+            membership_ended_at=str(membership.get("ended_at", "")),
             honorary=bool(membership.get("honorary", False)),
             contribution_rule_id=str(contribution.get("rule_id", "standard-2022")),
             payment_frequency=str(contribution.get("payment_frequency", "annual")),
@@ -183,6 +199,14 @@ class Asset:
     serial_number: str = ""
     status: str = "available"
     current_holder_member_id: str = ""
+    owner_type: str = "club"
+    owner_member_id: str = ""
+    owner_name: str = ""
+    custody_type: str = "club"
+    location: str = ""
+    handed_over_at: str = ""
+    condition: str = ""
+    estimated_value: str = ""
     deposit_amount_default: str = "0.00"
     notes: str = ""
     created_at: str = field(default_factory=_iso_now)
@@ -199,6 +223,14 @@ class Asset:
             "serial_number": self.serial_number,
             "status": self.status,
             "current_holder_member_id": self.current_holder_member_id,
+            "owner_type": self.owner_type,
+            "owner_member_id": self.owner_member_id,
+            "owner_name": self.owner_name,
+            "custody_type": self.custody_type,
+            "location": self.location,
+            "handed_over_at": self.handed_over_at,
+            "condition": self.condition,
+            "estimated_value": self.estimated_value,
             "deposit_amount_default": self.deposit_amount_default,
             "notes": self.notes,
             "created_at": self.created_at,
@@ -216,6 +248,19 @@ class Asset:
             serial_number=str(data.get("serial_number", "")),
             status=str(data.get("status", "available")),
             current_holder_member_id=str(data.get("current_holder_member_id", "")),
+            owner_type=str(data.get("owner_type", "club")),
+            owner_member_id=str(data.get("owner_member_id", "")),
+            owner_name=str(data.get("owner_name", "")),
+            custody_type=str(
+                data.get(
+                    "custody_type",
+                    "member" if data.get("current_holder_member_id") else "club",
+                )
+            ),
+            location=str(data.get("location", "")),
+            handed_over_at=str(data.get("handed_over_at", "")),
+            condition=str(data.get("condition", "")),
+            estimated_value=str(data.get("estimated_value", "")),
             deposit_amount_default=str(data.get("deposit_amount_default", "0.00")),
             notes=str(data.get("notes", "")),
             created_at=str(data.get("created_at", _iso_now())),

src/ccma/rules/scripts/birthdate_check.py

@@ -37,6 +37,7 @@ def evaluate(context: RuleContext):
             birth_date=member.birth_date,
             accepted_at=member.accepted_at,
             membership_started_at=member.membership_started_at,
+            membership_ended_at=member.membership_ended_at,
             today=context.today,
         )
     except DateValidationError as exc:

src/ccma/rules/scripts/contribution_claims.py

@@ -18,6 +18,7 @@ def evaluate(context: RuleContext):
     try:
         accepted_at = parse_iso_date(member.accepted_at, "Aufnahmebeschluss")
         started_at = parse_iso_date(member.membership_started_at, "Mitglied seit") or accepted_at
+        ended_at = parse_iso_date(member.membership_ended_at, "Austrittsdatum")
     except DateValidationError:
         return []
     if not accepted_at or not started_at:
@@ -29,20 +30,22 @@ def evaluate(context: RuleContext):
         admission_fee = Decimal(str(admission_rule.get("admission_fee", "0")))
         if admission_fee > 0:
             due_days = int(admission_rule.get("first_payment_due_days_after_acceptance", 28))
-            actions.append(
-                create_claim(
-                    rule_id=RULE_ID,
-                    member=member,
-                    claim_key="admission-fee",
-                    payload={
-                        "type": "admission_fee",
-                        "title": "Aufnahmegebühr",
-                        "amount": _money(admission_fee),
-                        "due_date": (accepted_at + timedelta(days=due_days)).isoformat(),
-                        "calculation": {"rule_id": admission_rule.get("rule_id", "")},
-                    },
+            admission_due = accepted_at + timedelta(days=due_days)
+            if not ended_at or admission_due <= ended_at:
+                actions.append(
+                    create_claim(
+                        rule_id=RULE_ID,
+                        member=member,
+                        claim_key="admission-fee",
+                        payload={
+                            "type": "admission_fee",
+                            "title": "Aufnahmegebühr",
+                            "amount": _money(admission_fee),
+                            "due_date": admission_due.isoformat(),
+                            "calculation": {"rule_id": admission_rule.get("rule_id", "")},
+                        },
+                    )
                 )
-            )
 
     year_from = (
         started_at.year
@@ -50,11 +53,17 @@ def evaluate(context: RuleContext):
         else context.today.year
     )
     for year in range(year_from, context.today.year + 2):
-        actions.extend(_membership_claims(context, started_at, accepted_at, year))
+        actions.extend(_membership_claims(context, started_at, accepted_at, ended_at, year))
     return actions
 
 
-def _membership_claims(context: RuleContext, started_at: date, accepted_at: date, year: int):
+def _membership_claims(
+    context: RuleContext,
+    started_at: date,
+    accepted_at: date,
+    ended_at: date | None,
+    year: int,
+):
     member = context.member
     period_start = max(started_at, date(year, 1, 1))
     if period_start.year > year:
@@ -96,7 +105,14 @@ def _membership_claims(context: RuleContext, started_at: date, accepted_at: date
         due_date = regular_due
         if entry_year and regular_due < accepted_at + timedelta(days=due_days_after_entry):
             due_date = accepted_at + timedelta(days=due_days_after_entry)
+        if ended_at and due_date > ended_at:
+            continue
         claim_key = f"membership-fee:{year}:{suffix}"
+        full_period_months = last_month - first_month + 1
+        description = _title(year, suffix)
+        if months < full_period_months:
+            unit = "Monat" if months == 1 else "Monate"
+            description = f"{description} ({months} {unit})"
         actions.append(
             create_claim(
                 rule_id=RULE_ID,
@@ -105,6 +121,7 @@ def _membership_claims(context: RuleContext, started_at: date, accepted_at: date
                 payload={
                     "type": "membership_fee",
                     "title": _title(year, suffix),
+                    "description": description,
                     "amount": _money(amount),
                     "due_date": due_date.isoformat(),
                     "service_period": {

src/ccma/services/documents.py

@@ -211,6 +211,7 @@ def _template_values(
         "member.status": MEMBERSHIP_STATUS_LABELS.get(member.status, member.status),
         "member.accepted_at": format_date_for_display(member.accepted_at),
         "member.started_at": format_date_for_display(member.membership_started_at),
+        "member.ended_at": format_date_for_display(member.membership_ended_at),
         "member.street": member.street,
         "member.address_addition": member.address_addition,
         "member.postal_code": member.postal_code,

src/ccma/services/housekeeper.py

@@ -324,7 +324,9 @@ class Housekeeper:
                     {
                         "item_id": str(uuid4()),
                         "type": "base",
-                        "description": str(claim.get("title", claim_key)),
+                        "description": str(
+                            claim.get("description") or claim.get("title", claim_key)
+                        ),
                         "quantity": "1.00",
                         "unit_price": str(claim.get("amount", "0.00")),
                         "amount": str(claim.get("amount", "0.00")),

src/ccma/storage/repository.py

@@ -6,11 +6,13 @@ import shutil
 import unicodedata
 from collections.abc import Iterable
 from datetime import date, datetime, timedelta
+from decimal import Decimal
 from pathlib import Path
 from string import Formatter
 from uuid import uuid4
 
 from ccma.domain.contributions import (
+    allocated_total,
     claim_balance,
     claim_total,
     credit_allocated_total,
@@ -21,6 +23,8 @@ from ccma.domain.contributions import (
 )
 from ccma.domain.dates import DateValidationError, normalize_date_input, validate_member_dates
 from ccma.domain.models import (
+    ASSET_CUSTODY_TYPE_LABELS,
+    ASSET_OWNER_TYPE_LABELS,
     ASSET_STATUS_LABELS,
     MEMBERSHIP_STATUS_LABELS,
     Asset,
@@ -134,9 +138,7 @@ class MemberRepository:
         if builtin_templates.is_dir():
             for source in builtin_templates.iterdir():
                 destination_name = (
-                    "Forderung mit Positionen.fodt"
-                    if source.name == "Forderung.fodt"
-                    else source.name
+                    "Forderung mit Positionen.fodt" if source.name == "Forderung.fodt" else source.name
                 )
                 destination = templates_root / destination_name
                 if source.is_file() and not destination.exists():
@@ -167,13 +169,13 @@ class MemberRepository:
             try:
                 member, _contributions = self.preflight_member_record(member_dir.name)
                 errors.extend(
-                    f"{member_dir.name}/{warning}"
-                    for warning in self.member_hash_warnings(member_dir.name)
+                    f"{member_dir.name}/{warning}" for warning in self.member_hash_warnings(member_dir.name)
                 )
                 validate_member_dates(
                     birth_date=member.birth_date,
                     accepted_at=member.accepted_at,
                     membership_started_at=member.membership_started_at,
+                    membership_ended_at=member.membership_ended_at,
                 )
                 if member.member_id != member_dir.name:
                     errors.append(f"{member_dir.name}/member.json: member_id stimmt nicht mit Ordner überein")
@@ -199,8 +201,7 @@ class MemberRepository:
             try:
                 asset = self.get_asset(asset_dir.name)
                 errors.extend(
-                    f"{asset_dir.name}/{warning}"
-                    for warning in self.asset_hash_warnings(asset_dir.name)
+                    f"{asset_dir.name}/{warning}" for warning in self.asset_hash_warnings(asset_dir.name)
                 )
                 if asset.asset_id != asset_dir.name:
                     errors.append(f"{asset_dir.name}/asset.json: asset_id stimmt nicht mit Ordner überein")
@@ -219,6 +220,17 @@ class MemberRepository:
                         )
                 elif asset.status == "issued":
                     errors.append(f"{asset_dir.name}/asset.json: issued benötigt current_holder_member_id")
+                if asset.owner_type not in ASSET_OWNER_TYPE_LABELS:
+                    errors.append(f"{asset_dir.name}/asset.json: ungültiger Eigentümertyp")
+                if asset.custody_type not in ASSET_CUSTODY_TYPE_LABELS:
+                    errors.append(f"{asset_dir.name}/asset.json: ungültiger Gewahrsamstyp")
+                if asset.owner_type == "member":
+                    if asset.owner_member_id:
+                        self.get_member(asset.owner_member_id)
+                    else:
+                        errors.append(
+                            f"{asset_dir.name}/asset.json: Mitgliedseigentum benötigt owner_member_id"
+                        )
                 self.get_asset_events(asset.asset_id)
             except RepositoryError as exc:
                 errors.append(str(exc))
@@ -325,6 +337,7 @@ class MemberRepository:
             member.birth_date = normalize_date_input(member.birth_date, "Geburtsdatum")
             member.accepted_at = normalize_date_input(member.accepted_at, "Aufnahmebeschluss")
             member.membership_started_at = normalize_date_input(member.membership_started_at, "Mitglied seit")
+            member.membership_ended_at = normalize_date_input(member.membership_ended_at, "Austrittsdatum")
             member.mandate_signed_at = normalize_date_input(member.mandate_signed_at, "Mandat erteilt am")
             member.mandate_revoked_at = normalize_date_input(
                 member.mandate_revoked_at, "Mandat widerrufen am"
@@ -333,7 +346,10 @@ class MemberRepository:
                 birth_date=member.birth_date,
                 accepted_at=member.accepted_at,
                 membership_started_at=member.membership_started_at,
+                membership_ended_at=member.membership_ended_at,
             )
+            if member.membership_ended_at and date.fromisoformat(member.membership_ended_at) <= date.today():
+                member.status = "ended"
         except DateValidationError as exc:
             raise RepositoryError(str(exc)) from exc
         member.iban = normalize_iban(member.iban)
@@ -393,6 +409,14 @@ class MemberRepository:
         serial_number: str = "",
         deposit_amount_default: str = "0",
         notes: str = "",
+        owner_type: str = "club",
+        owner_member_id: str = "",
+        owner_name: str = "",
+        custody_type: str = "club",
+        location: str = "",
+        handed_over_at: str = "",
+        condition: str = "",
+        estimated_value: str = "",
     ) -> Asset:
         if not label.strip():
             raise RepositoryError("Eine Bezeichnung für das Asset ist erforderlich.")
@@ -402,6 +426,7 @@ class MemberRepository:
             raise RepositoryError(str(exc)) from exc
         if deposit_amount < 0:
             raise RepositoryError("Die Kaution darf nicht negativ sein.")
+        self._validate_asset_relationships(owner_type, owner_member_id, owner_name, custody_type, "")
         asset_id = str(uuid4())
         directory = self._asset_path(asset_id)
         directory.mkdir(parents=True, exist_ok=False)
@@ -414,6 +439,14 @@ class MemberRepository:
             serial_number=serial_number.strip(),
             deposit_amount_default=money_text(deposit_amount),
             notes=notes.strip(),
+            owner_type=owner_type,
+            owner_member_id=owner_member_id,
+            owner_name=owner_name.strip(),
+            custody_type=custody_type,
+            location=location.strip(),
+            handed_over_at=handed_over_at.strip(),
+            condition=condition.strip(),
+            estimated_value=estimated_value.strip(),
         )
         write_json_atomic(directory / "asset.json", asset.to_dict())
         self.append_asset_event(
@@ -423,6 +456,15 @@ class MemberRepository:
             actor_type="user",
             actor_name="Vorstand",
         )
+        if asset.owner_type == "member":
+            self.append_event(
+                asset.owner_member_id,
+                event_type="member_asset_registered",
+                summary=f"Privateigentum im Inventar erfasst: {asset.label}",
+                actor_type="user",
+                actor_name="Vorstand",
+                references={"asset_id": asset.asset_id},
+            )
         return asset
 
     def save_asset(self, asset: Asset, *, actor_name: str = "Vorstand") -> None:
@@ -431,15 +473,21 @@ class MemberRepository:
             raise RepositoryError("Eine Bezeichnung für das Asset ist erforderlich.")
         if asset.status not in ASSET_STATUS_LABELS:
             raise RepositoryError("Ungültiger Asset-Status.")
+        self._validate_asset_relationships(
+            asset.owner_type,
+            asset.owner_member_id,
+            asset.owner_name,
+            asset.custody_type,
+            asset.current_holder_member_id,
+        )
         try:
             deposit_amount = decimal_value(asset.deposit_amount_default or "0", "Kaution")
         except ValueError as exc:
             raise RepositoryError(str(exc)) from exc
         if deposit_amount < 0:
             raise RepositoryError("Die Kaution darf nicht negativ sein.")
-        if (
-            existing.current_holder_member_id
-            and money_text(deposit_amount) != str(existing.deposit_amount_default)
+        if existing.current_holder_member_id and money_text(deposit_amount) != str(
+            existing.deposit_amount_default
         ):
             raise RepositoryError(
                 "Die Kaution kann nur geändert werden, wenn das Asset nicht ausgegeben ist."
@@ -450,6 +498,11 @@ class MemberRepository:
         asset.serial_number = asset.serial_number.strip()
         asset.deposit_amount_default = money_text(deposit_amount)
         asset.notes = asset.notes.strip()
+        asset.owner_name = asset.owner_name.strip()
+        asset.location = asset.location.strip()
+        asset.handed_over_at = asset.handed_over_at.strip()
+        asset.condition = asset.condition.strip()
+        asset.estimated_value = asset.estimated_value.strip()
         if asset.current_holder_member_id:
             self.get_member(asset.current_holder_member_id)
             if asset.status != "issued":
@@ -467,6 +520,25 @@ class MemberRepository:
                 actor_type="user",
                 actor_name=actor_name,
             )
+        if existing.owner_member_id != asset.owner_member_id:
+            if existing.owner_type == "member" and existing.owner_member_id:
+                self.append_event(
+                    existing.owner_member_id,
+                    event_type="member_asset_ownership_ended",
+                    summary=f"Nicht mehr als Privateigentum geführt: {asset.label}",
+                    actor_type="user",
+                    actor_name=actor_name,
+                    references={"asset_id": asset.asset_id},
+                )
+            if asset.owner_type == "member" and asset.owner_member_id:
+                self.append_event(
+                    asset.owner_member_id,
+                    event_type="member_asset_registered",
+                    summary=f"Privateigentum im Inventar erfasst: {asset.label}",
+                    actor_type="user",
+                    actor_name=actor_name,
+                    references={"asset_id": asset.asset_id},
+                )
 
     def assign_asset(self, asset_id: str, member_id: str, *, actor_name: str = "Vorstand") -> Asset:
         asset = self.get_asset(asset_id)
@@ -476,6 +548,7 @@ class MemberRepository:
         if asset.status in {"lost", "retired"}:
             raise RepositoryError("Verlorene oder ausgemusterte Assets können nicht ausgegeben werden.")
         asset.current_holder_member_id = member.member_id
+        asset.custody_type = "member"
         asset.status = "issued"
         asset.updated_at = datetime.now().astimezone().isoformat(timespec="seconds")
         write_json_atomic(self._asset_path(asset.asset_id) / "asset.json", asset.to_dict())
@@ -503,6 +576,7 @@ class MemberRepository:
         if not member_id:
             raise RepositoryError("Das Asset ist aktuell keinem Mitglied zugeordnet.")
         asset.current_holder_member_id = ""
+        asset.custody_type = "club"
         asset.status = "available"
         asset.updated_at = datetime.now().astimezone().isoformat(timespec="seconds")
         write_json_atomic(self._asset_path(asset.asset_id) / "asset.json", asset.to_dict())
@@ -528,6 +602,41 @@ class MemberRepository:
         self.get_member(member_id)
         return [asset for asset in self.list_assets() if asset.current_holder_member_id == member_id]
 
+    def list_member_owned_assets(self, member_id: str) -> list[Asset]:
+        self.get_member(member_id)
+        return [
+            asset
+            for asset in self.list_assets()
+            if asset.owner_type == "member" and asset.owner_member_id == member_id
+        ]
+
+    def _validate_asset_relationships(
+        self,
+        owner_type: str,
+        owner_member_id: str,
+        owner_name: str,
+        custody_type: str,
+        holder_member_id: str,
+    ) -> None:
+        if owner_type not in ASSET_OWNER_TYPE_LABELS:
+            raise RepositoryError("Ungültiger Eigentümertyp.")
+        if custody_type not in ASSET_CUSTODY_TYPE_LABELS:
+            raise RepositoryError("Ungültiger Gewahrsamstyp.")
+        if owner_type == "member":
+            if not owner_member_id:
+                raise RepositoryError("Bei Mitgliedseigentum muss ein Mitglied ausgewählt werden.")
+            self.get_member(owner_member_id)
+        elif owner_member_id:
+            raise RepositoryError("Eine Eigentümer-Mitglieds-ID ist nur bei Mitgliedseigentum erlaubt.")
+        if owner_type == "external" and not owner_name.strip():
+            raise RepositoryError("Bei externem Eigentum ist ein Eigentümername erforderlich.")
+        if custody_type == "member":
+            if not holder_member_id:
+                raise RepositoryError("Gewahrsam beim Mitglied benötigt eine Mitgliedszuordnung.")
+            self.get_member(holder_member_id)
+        elif holder_member_id:
+            raise RepositoryError("Eine Halter-Mitglieds-ID ist nur bei Gewahrsam eines Mitglieds erlaubt.")
+
     def create_manual_claim(
         self,
         member_id: str,
@@ -731,6 +840,88 @@ class MemberRepository:
         )
         return item
 
+    def update_claim(
+        self,
+        member_id: str,
+        claim_id: str,
+        *,
+        title: str,
+        due_date: str,
+        base_amount: str,
+        description: str,
+        actor_name: str = "Vorstand",
+    ) -> dict:
+        if not title.strip():
+            raise RepositoryError("Ein Forderungstitel ist erforderlich.")
+        try:
+            normalized_due_date = normalize_date_input(due_date, "Fälligkeitsdatum")
+            selected_base_amount = decimal_value(base_amount, "Grundbetrag")
+        except (DateValidationError, ValueError) as exc:
+            raise RepositoryError(str(exc)) from exc
+        if not normalized_due_date:
+            raise RepositoryError("Ein Fälligkeitsdatum ist erforderlich.")
+        if selected_base_amount == 0:
+            raise RepositoryError("Der Grundbetrag darf nicht null sein.")
+
+        data, claim = self.get_claim(member_id, claim_id)
+        if str(claim.get("status", "")) == "cancelled":
+            raise RepositoryError("Eine stornierte Forderung kann nicht bearbeitet werden.")
+        items = materialize_claim_items(claim)
+        base_item = next((item for item in items if str(item.get("type", "")) == "base"), None)
+        if base_item is None:
+            raise RepositoryError("Die Forderung hat keine bearbeitbare Grundposition.")
+
+        other_total = sum(
+            (decimal_value(item.get("amount", "0")) for item in items if item is not base_item),
+            Decimal("0"),
+        )
+        new_total = selected_base_amount + other_total
+        settled = allocated_total(data, claim_id)
+        if new_total >= 0 and settled > new_total:
+            raise RepositoryError(
+                f"Der neue Gesamtbetrag darf nicht unter dem bereits zugeordneten Betrag "
+                f"von {money_text(settled)} EUR liegen."
+            )
+
+        old_values = {
+            "title": str(claim.get("title", "")),
+            "due_date": str(claim.get("due_date", "")),
+            "base_amount": str(base_item.get("amount", "")),
+            "description": str(base_item.get("description", "")),
+        }
+        now = datetime.now().astimezone().isoformat(timespec="seconds")
+        claim["title"] = title.strip()
+        claim["due_date"] = normalized_due_date
+        claim["amount"] = money_text(new_total)
+        base_item["description"] = description.strip() or title.strip()
+        base_item["quantity"] = "1.00"
+        base_item["unit_price"] = money_text(selected_base_amount)
+        base_item["amount"] = money_text(selected_base_amount)
+        calculation = claim.get("calculation")
+        if not isinstance(calculation, dict):
+            calculation = {}
+            claim["calculation"] = calculation
+        calculation["manual_override"] = {"at": now, "actor": actor_name}
+        self.save_contributions(member_id, data)
+        self.append_event(
+            member_id,
+            event_type="claim_changed",
+            summary=f"Forderung geändert: {claim['title']}",
+            actor_type="user",
+            actor_name=actor_name,
+            references={"claim_id": claim_id},
+            data={
+                "old": old_values,
+                "new": {
+                    "title": claim["title"],
+                    "due_date": claim["due_date"],
+                    "base_amount": base_item["amount"],
+                    "description": base_item["description"],
+                },
+            },
+        )
+        return claim
+
     def record_payment(
         self,
         member_id: str,
@@ -760,6 +951,11 @@ class MemberRepository:
         if gnucash_id:
             self._assert_gnucash_id_available(gnucash_id)
         data, claim = self.get_claim(member_id, claim_id)
+        available_claim_balance = max(claim_balance(data, claim), Decimal("0"))
+        if selected_allocation > available_claim_balance:
+            raise RepositoryError(
+                f"Die Forderung hat nur noch {money_text(available_claim_balance)} EUR offen."
+            )
         payment = {
             "payment_id": str(uuid4()),
             "date": normalized_date,
@@ -788,7 +984,7 @@ class MemberRepository:
         return payment
 
     def allocate_payment(self, member_id: str, claim_id: str, *, payment_id: str, amount: str) -> dict:
-        data, _claim = self.get_claim(member_id, claim_id)
+        data, claim = self.get_claim(member_id, claim_id)
         payment = next(
             (item for item in data.payments if str(item.get("payment_id", "")) == payment_id),
             None,
@@ -802,6 +998,11 @@ class MemberRepository:
             raise RepositoryError(str(exc)) from exc
         if selected_amount <= 0 or selected_amount > available:
             raise RepositoryError(f"Es sind nur {money_text(available)} EUR dieser Zahlung verfügbar.")
+        available_claim_balance = max(claim_balance(data, claim), Decimal("0"))
+        if selected_amount > available_claim_balance:
+            raise RepositoryError(
+                f"Die Forderung hat nur noch {money_text(available_claim_balance)} EUR offen."
+            )
         allocation = {
             "allocation_id": str(uuid4()),
             "payment_id": payment_id,
@@ -818,6 +1019,140 @@ class MemberRepository:
         )
         return allocation
 
+    def update_payment(
+        self,
+        member_id: str,
+        payment_id: str,
+        *,
+        payment_date: str,
+        amount: str,
+        allocations: dict[str, str],
+        gnucash_transaction_id: str = "",
+        reference: str = "",
+    ) -> dict:
+        data = self.get_contributions(member_id)
+        payment = next(
+            (item for item in data.payments if str(item.get("payment_id", "")) == payment_id),
+            None,
+        )
+        if payment is None:
+            raise RepositoryError("Zahlung nicht gefunden.")
+        try:
+            normalized_date = normalize_date_input(payment_date, "Zahlungsdatum")
+            selected_amount = decimal_value(amount)
+        except (DateValidationError, ValueError) as exc:
+            raise RepositoryError(str(exc)) from exc
+        if not normalized_date:
+            raise RepositoryError("Zahlungsdatum ist erforderlich.")
+        if selected_amount <= 0:
+            raise RepositoryError("Der Zahlungsbetrag muss größer als null sein.")
+
+        claims_by_id = {str(claim.get("claim_id", "")): claim for claim in data.claims}
+        old_allocations = [item for item in data.allocations if str(item.get("payment_id", "")) == payment_id]
+        old_by_claim: dict[str, list[dict]] = {}
+        for allocation in old_allocations:
+            old_by_claim.setdefault(str(allocation.get("claim_id", "")), []).append(allocation)
+
+        selected_allocations: dict[str, Decimal] = {}
+        for claim_id, raw_amount in allocations.items():
+            if claim_id not in claims_by_id:
+                raise RepositoryError(f"Forderung nicht gefunden: {claim_id}")
+            try:
+                allocation_amount = decimal_value(raw_amount, "Zuordnung")
+            except ValueError as exc:
+                raise RepositoryError(str(exc)) from exc
+            if allocation_amount < 0:
+                raise RepositoryError("Zuordnungen dürfen nicht negativ sein.")
+            if allocation_amount == 0:
+                continue
+            claim = claims_by_id[claim_id]
+            currently_allocated = sum(
+                (decimal_value(item.get("amount", "0")) for item in old_by_claim.get(claim_id, [])),
+                Decimal("0"),
+            )
+            available_claim_balance = max(
+                claim_balance(data, claim) + currently_allocated,
+                Decimal("0"),
+            )
+            if allocation_amount > available_claim_balance:
+                raise RepositoryError(
+                    f"{claim.get('title', 'Forderung')} hat nur "
+                    f"{money_text(available_claim_balance)} EUR offen."
+                )
+            selected_allocations[claim_id] = allocation_amount
+
+        allocated_sum = sum(selected_allocations.values(), Decimal("0"))
+        if allocated_sum > selected_amount:
+            raise RepositoryError(
+                f"Die Zuordnungen ({money_text(allocated_sum)} EUR) übersteigen den "
+                f"Zahlungsbetrag ({money_text(selected_amount)} EUR)."
+            )
+
+        gnucash_id = gnucash_transaction_id.strip()
+        if gnucash_id:
+            self._assert_gnucash_id_available(gnucash_id, exclude_payment_id=payment_id)
+        payment.update(
+            {
+                "date": normalized_date,
+                "amount": money_text(selected_amount),
+                "gnucash_transaction_id": gnucash_id,
+                "reference": reference.strip(),
+                "updated_at": datetime.now().astimezone().isoformat(timespec="seconds"),
+            }
+        )
+
+        retained_allocations = [
+            item for item in data.allocations if str(item.get("payment_id", "")) != payment_id
+        ]
+        new_allocations = []
+        for claim_id, allocation_amount in selected_allocations.items():
+            prior = old_by_claim.get(claim_id, [])
+            new_allocations.append(
+                {
+                    "allocation_id": (str(prior[0].get("allocation_id", "")) if prior else str(uuid4())),
+                    "payment_id": payment_id,
+                    "claim_id": claim_id,
+                    "amount": money_text(allocation_amount),
+                }
+            )
+        data.allocations = retained_allocations + new_allocations
+        self.save_contributions(member_id, data)
+        self.append_event(
+            member_id,
+            event_type="payment_changed",
+            summary=f"Zahlung geändert: {payment['amount']} EUR",
+            actor_type="user",
+            actor_name="Vorstand",
+            references={"payment_id": payment_id},
+            data={
+                "allocated_amount": money_text(allocated_sum),
+                "unallocated_amount": money_text(selected_amount - allocated_sum),
+            },
+        )
+        return payment
+
+    def delete_payment(self, member_id: str, payment_id: str) -> None:
+        data = self.get_contributions(member_id)
+        payment = next(
+            (item for item in data.payments if str(item.get("payment_id", "")) == payment_id),
+            None,
+        )
+        if payment is None:
+            raise RepositoryError("Zahlung nicht gefunden.")
+        data.payments = [item for item in data.payments if str(item.get("payment_id", "")) != payment_id]
+        data.allocations = [
+            item for item in data.allocations if str(item.get("payment_id", "")) != payment_id
+        ]
+        self.save_contributions(member_id, data)
+        self.append_event(
+            member_id,
+            event_type="payment_deleted",
+            summary=f"Zahlung gelöscht: {payment.get('amount', '')} EUR",
+            actor_type="user",
+            actor_name="Vorstand",
+            references={"payment_id": payment_id},
+        )
+
     def record_credit(
         self,
         member_id: str,
@@ -1127,7 +1462,9 @@ class MemberRepository:
             references={"claim_id": claim_id},
         )
 
-    def _assert_gnucash_id_available(self, transaction_id: str) -> None:
+    def _assert_gnucash_id_available(
+        self, transaction_id: str, *, exclude_payment_id: str | None = None
+    ) -> None:
         selected = transaction_id.casefold()
         for member in self.list_members():
             try:
@@ -1135,7 +1472,9 @@ class MemberRepository:
             except RepositoryError:
                 continue
             if any(
-                str(payment.get("gnucash_transaction_id", "")).casefold() == selected for payment in payments
+                str(payment.get("payment_id", "")) != exclude_payment_id
+                and str(payment.get("gnucash_transaction_id", "")).casefold() == selected
+                for payment in payments
             ):
                 raise RepositoryError(f"GnuCash-ID bereits verwendet: {transaction_id}")
 
@@ -1390,6 +1729,7 @@ class MemberRepository:
             "email": "E-Mail-Adresse",
             "phone": "Telefonnummer",
             "birth_date": "Geburtsdatum",
+            "membership_ended_at": "Austrittsdatum",
             "status": "Status",
             "payment_frequency": "Zahlungsweise",
             "contribution_rule_id": "Beitragsregel",
@@ -1431,6 +1771,14 @@ class MemberRepository:
             "serial_number": "Seriennummer",
             "status": "Status",
             "current_holder_member_id": "Zuordnung",
+            "owner_type": "Eigentümertyp",
+            "owner_member_id": "Eigentümer",
+            "owner_name": "Externer Eigentümer",
+            "custody_type": "Gewahrsam",
+            "location": "Standort",
+            "handed_over_at": "Übergabedatum",
+            "condition": "Zustand",
+            "estimated_value": "Wert",
             "deposit_amount_default": "Kaution",
             "notes": "Notiz",
         }
@@ -1452,8 +1800,7 @@ def validate_iban(value: str) -> None:
         raise RepositoryError("Die IBAN hat kein gültiges Format.")
     rearranged = value[4:] + value[:4]
     numeric = "".join(
-        str(ord(character) - 55) if character.isalpha() else character
-        for character in rearranged
+        str(ord(character) - 55) if character.isalpha() else character for character in rearranged
     )
     if int(numeric) % 97 != 1:
         raise RepositoryError("Die IBAN-Prüfsumme ist ungültig.")

src/ccma/ui/asset_tab.py

@@ -115,6 +115,10 @@ class AssetTab(ttk.Frame):
             ("Inventarnummer", "inventory_number"),
             ("Seriennummer", "serial_number"),
             ("Kaution (EUR)", "deposit_amount_default"),
+            ("Standort", "location"),
+            ("Übergabedatum", "handed_over_at"),
+            ("Zustand bei Übergabe", "condition"),
+            ("Wert / Kaufpreis", "estimated_value"),
         ]
         for row, (label, key) in enumerate(fields):
             self.variables[key] = tk.StringVar()
@@ -151,15 +155,22 @@ class AssetTab(ttk.Frame):
         )
         self.holder_label.grid(row=holder_row + 1, column=1, sticky="w", pady=5)
         self.holder_label.bind("<Button-1>", lambda _event: self._open_holder_member(), add="+")
+        self.owner_var = tk.StringVar()
+        ttk.Label(data_tab, text="Eigentümer").grid(
+            row=holder_row + 2, column=0, sticky="w", pady=5, padx=(0, 12)
+        )
+        self.owner_label = ttk.Label(data_tab, textvariable=self.owner_var, style="TimelineHeader.TLabel")
+        self.owner_label.grid(row=holder_row + 2, column=1, sticky="w", pady=5)
+        self.owner_label.bind("<Button-1>", lambda _event: self._open_owner_member(), add="+")
         ttk.Label(data_tab, text="Interne Notiz").grid(
-            row=holder_row + 2,
+            row=holder_row + 3,
             column=0,
             sticky="nw",
             pady=5,
             padx=(0, 12),
         )
         self.notes_text = tk.Text(data_tab, width=42, height=6, wrap="word")
-        self.notes_text.grid(row=holder_row + 2, column=1, sticky="ew", pady=5)
+        self.notes_text.grid(row=holder_row + 3, column=1, sticky="ew", pady=5)
         data_tab.columnconfigure(1, weight=1)
         self.issue_button = ttk.Button(
             action_buttons,
@@ -276,13 +287,19 @@ class AssetTab(ttk.Frame):
         self.variables["inventory_number"].set(self.asset.inventory_number)
         self.variables["serial_number"].set(self.asset.serial_number)
         self.variables["deposit_amount_default"].set(self.asset.deposit_amount_default)
+        self.variables["location"].set(self.asset.location)
+        self.variables["handed_over_at"].set(self.asset.handed_over_at)
+        self.variables["condition"].set(self.asset.condition)
+        self.variables["estimated_value"].set(self.asset.estimated_value)
         self.variables["status"].set(ASSET_STATUS_LABELS.get(self.asset.status, self.asset.status.upper()))
         if self.notes_text is not None:
             self.notes_text.delete("1.0", "end")
             self.notes_text.insert("1.0", self.asset.notes)
         self.holder_var.set(holder)
+        self.owner_var.set(self._owner_label())
         issued = bool(self.asset.current_holder_member_id)
         self.holder_label.configure(cursor="hand2" if issued else "")
+        self.owner_label.configure(cursor="hand2" if self.asset.owner_type == "member" else "")
         self.issue_button.configure(state="normal" if self.asset.status == "available" else "disabled")
         self.return_button.configure(state="normal" if issued else "disabled")
         self.status_box.configure(state="disabled" if issued else "readonly")
@@ -300,6 +317,21 @@ class AssetTab(ttk.Frame):
             return self.asset.current_holder_member_id
         return f"{member.member_number or member.member_id} · {member.display_name}"
 
+    def _owner_label(self) -> str:
+        if self.asset.owner_type == "club":
+            return "Verein"
+        if self.asset.owner_type == "external":
+            return self.asset.owner_name or "Extern"
+        try:
+            member = self.repository.get_member(self.asset.owner_member_id)
+        except RepositoryError:
+            return self.asset.owner_member_id or "—"
+        return f"{member.member_number or member.member_id} · {member.display_name}"
+
+    def _open_owner_member(self) -> None:
+        if self.asset.owner_type == "member" and self.asset.owner_member_id:
+            self.on_open_member(self.asset.owner_member_id)
+
     def _refresh_events(self) -> None:
         self.timeline.delete(*self.timeline.get_children())
         try:
@@ -352,6 +384,10 @@ class AssetTab(ttk.Frame):
         self.asset.inventory_number = self.variables["inventory_number"].get().strip()
         self.asset.serial_number = self.variables["serial_number"].get().strip()
         self.asset.notes = self.notes_text.get("1.0", "end-1c").strip() if self.notes_text else ""
+        self.asset.location = self.variables["location"].get().strip()
+        self.asset.handed_over_at = self.variables["handed_over_at"].get().strip()
+        self.asset.condition = self.variables["condition"].get().strip()
+        self.asset.estimated_value = self.variables["estimated_value"].get().strip()
         if not self.asset.current_holder_member_id:
             self.asset.deposit_amount_default = self.variables["deposit_amount_default"].get().strip()
             self.asset.status = _asset_status_key(self.variables["status"].get())

src/ccma/ui/claim_tab.py

@@ -88,8 +88,10 @@ class ClaimTab(ttk.Frame):
         footer.columnconfigure(0, weight=1)
         self.hold_button = ttk.Button(footer, text="Mahnsperre setzen", command=self._toggle_hold)
         self.hold_button.grid(row=0, column=0, sticky="w")
+        self.edit_button = ttk.Button(footer, text="Forderung bearbeiten", command=self._edit_claim)
+        self.edit_button.grid(row=0, column=1, sticky="e", padx=(0, 8))
         self.cancel_button = ttk.Button(footer, text="Forderung stornieren", command=self._cancel_claim)
-        self.cancel_button.grid(row=0, column=1, sticky="e")
+        self.cancel_button.grid(row=0, column=2, sticky="e")
 
     def _build_ledger(self) -> None:
         ledger = ttk.Frame(self, padding=12)
@@ -185,6 +187,7 @@ class ClaimTab(ttk.Frame):
         self.summary_vars["balance"].set(f"{money_text(balance)} EUR")
         self.summary_vars["status"].set(CLAIM_STATUS_LABELS.get(status, status.upper()))
         self.cancel_button.configure(state="disabled" if status == "cancelled" else "normal")
+        self.edit_button.configure(state="disabled" if status == "cancelled" else "normal")
         self.hold_button.configure(text="Mahnsperre aufheben" if hold.get("active") else "Mahnsperre setzen")
         self._render_ledger()
 
@@ -478,6 +481,16 @@ class ClaimTab(ttk.Frame):
             return
         self._changed()
 
+    def _edit_claim(self) -> None:
+        ClaimEditDialog(
+            self,
+            self.repository,
+            self.member_id,
+            self.claim_id,
+            self.claim,
+            self._changed,
+        )
+
     def _changed(self) -> None:
         self.refresh()
         self.on_changed()
@@ -502,6 +515,68 @@ class _Dialog(tk.Toplevel):
         ttk.Button(buttons, text="Speichern", style="Accent.TButton", command=command).pack(side="left")
 
 
+class ClaimEditDialog(_Dialog):
+    def __init__(self, master, repository, member_id, claim_id, claim, on_saved):
+        super().__init__(master, "Forderung bearbeiten", on_saved)
+        self.repository = repository
+        self.member_id = member_id
+        self.claim_id = claim_id
+        items = claim_items(claim)
+        base_item = next(
+            (item for item in items if str(item.get("type", "")) == "base"),
+            items[0] if items else {},
+        )
+        self.variables = {
+            "title": tk.StringVar(value=str(claim.get("title", ""))),
+            "due_date": tk.StringVar(
+                value=format_date_for_display(str(claim.get("due_date", "")))
+            ),
+            "base_amount": tk.StringVar(
+                value=str(base_item.get("amount", claim.get("amount", "")))
+            ),
+            "description": tk.StringVar(value=str(base_item.get("description", ""))),
+        }
+        fields = (
+            ("Titel", "title"),
+            (f"Fällig am ({date_input_hint()})", "due_date"),
+            ("Grundbetrag", "base_amount"),
+            ("Beschreibung der Grundposition", "description"),
+        )
+        for row, (label, key) in enumerate(fields):
+            ttk.Label(self.frame, text=label).grid(
+                row=row, column=0, sticky="w", pady=5, padx=(0, 12)
+            )
+            ttk.Entry(self.frame, textvariable=self.variables[key], width=52).grid(
+                row=row, column=1, sticky="ew", pady=5
+            )
+        ttk.Label(
+            self.frame,
+            text=(
+                "Der Grundbetrag ändert nur die Grundposition. Weitere Positionen, "
+                "zum Beispiel Mahngebühren, bleiben erhalten."
+            ),
+            style="Mono.TLabel",
+            wraplength=520,
+        ).grid(row=len(fields), column=0, columnspan=2, sticky="w", pady=(8, 0))
+        self._buttons(len(fields) + 1, self._save)
+
+    def _save(self) -> None:
+        try:
+            self.repository.update_claim(
+                self.member_id,
+                self.claim_id,
+                title=self.variables["title"].get(),
+                due_date=self.variables["due_date"].get(),
+                base_amount=self.variables["base_amount"].get(),
+                description=self.variables["description"].get(),
+            )
+        except RepositoryError as exc:
+            messagebox.showerror("Forderung konnte nicht gespeichert werden", str(exc), parent=self)
+            return
+        self.destroy()
+        self.on_saved()
+
+
 class ItemDialog(_Dialog):
     def __init__(self, master, repository, member_id, claim_id, on_saved):
         super().__init__(master, "Forderungsposition hinzufügen", on_saved)
@@ -634,7 +709,11 @@ class AllocatePaymentDialog(_Dialog):
         self.repository, self.member_id, self.claim_id = repository, member_id, claim_id
         data = repository.get_contributions(member_id)
         self.payment_by_label = {}
-        for payment in data.payments:
+        for payment in sorted(
+            data.payments,
+            key=lambda item: (str(item.get("date", "")), str(item.get("created_at", ""))),
+            reverse=True,
+        ):
             payment_id = str(payment.get("payment_id", ""))
             available = decimal_value(payment.get("amount", "0")) - payment_allocated_total(data, payment_id)
             if available <= 0:
@@ -655,10 +734,23 @@ class AllocatePaymentDialog(_Dialog):
             width=60,
         )
         combo.grid(row=0, column=1, pady=5)
-        ttk.Label(self.frame, text="Betrag").grid(row=1, column=0, sticky="w", pady=5, padx=(0, 12))
-        ttk.Entry(self.frame, textvariable=self.amount_var).grid(row=1, column=1, sticky="ew", pady=5)
+        if not self.payment_by_label:
+            ttk.Label(
+                self.frame,
+                text="Für dieses Mitglied gibt es keine Zahlung mit freiem Restbetrag.",
+                style="Mono.TLabel",
+            ).grid(row=1, column=0, columnspan=2, sticky="w", pady=(3, 5))
+            amount_row = 2
+        else:
+            amount_row = 1
+        ttk.Label(self.frame, text="Betrag").grid(
+            row=amount_row, column=0, sticky="w", pady=5, padx=(0, 12)
+        )
+        ttk.Entry(self.frame, textvariable=self.amount_var).grid(
+            row=amount_row, column=1, sticky="ew", pady=5
+        )
         combo.bind("<<ComboboxSelected>>", lambda _event: self._select(balance))
-        self._buttons(2, self._save)
+        self._buttons(amount_row + 1, self._save)
 
     def _select(self, balance):
         _payment_id, available = self.payment_by_label[self.payment_var.get()]

src/ccma/ui/dialogs.py

@@ -124,13 +124,31 @@ class NewAssetDialog(tk.Toplevel):
         super().__init__(master)
         self.repository = repository
         self.on_created = on_created
+        self.members = repository.list_members()
+        self.member_labels = {
+            f"{member.member_number or member.member_id} · {member.display_name}": member.member_id
+            for member in self.members
+        }
         self.title("Neues Asset")
         self.transient(master.winfo_toplevel())
         self.resizable(False, False)
         self.variables = {
             name: tk.StringVar()
-            for name in ("label", "category", "inventory_number", "serial_number", "deposit_amount_default")
+            for name in (
+                "label",
+                "category",
+                "inventory_number",
+                "serial_number",
+                "deposit_amount_default",
+                "location",
+                "handed_over_at",
+                "condition",
+                "estimated_value",
+                "owner_name",
+            )
         }
+        self.owner_type_var = tk.StringVar(value="VEREIN")
+        self.owner_member_var = tk.StringVar()
         self._build_ui()
         self.bind("<Escape>", lambda _event: self.destroy())
         self.bind("<Return>", lambda _event: self._create())
@@ -145,6 +163,10 @@ class NewAssetDialog(tk.Toplevel):
             ("Inventarnummer", "inventory_number"),
             ("Seriennummer", "serial_number"),
             ("Kaution (EUR)", "deposit_amount_default"),
+            ("Standort", "location"),
+            ("Übergabedatum", "handed_over_at"),
+            ("Zustand bei Übergabe", "condition"),
+            ("Wert / Kaufpreis", "estimated_value"),
         ]
         self.entries: dict[str, ttk.Entry] = {}
         for row, (label, key) in enumerate(fields):
@@ -152,17 +174,42 @@ class NewAssetDialog(tk.Toplevel):
             entry = ttk.Entry(frame, textvariable=self.variables[key], width=38)
             entry.grid(row=row, column=1, sticky="ew", pady=5)
             self.entries[key] = entry
+        owner_row = len(fields)
+        ttk.Label(frame, text="Eigentümer").grid(row=owner_row, column=0, sticky="w", pady=5, padx=(0, 12))
+        ttk.Combobox(
+            frame,
+            textvariable=self.owner_type_var,
+            values=("VEREIN", "MITGLIED", "EXTERN"),
+            state="readonly",
+            width=35,
+        ).grid(row=owner_row, column=1, sticky="ew", pady=5)
+        ttk.Label(frame, text="Eigentümer-Mitglied").grid(
+            row=owner_row + 1, column=0, sticky="w", pady=5, padx=(0, 12)
+        )
+        ttk.Combobox(
+            frame,
+            textvariable=self.owner_member_var,
+            values=list(self.member_labels),
+            state="readonly",
+            width=35,
+        ).grid(row=owner_row + 1, column=1, sticky="ew", pady=5)
+        ttk.Label(frame, text="Externer Eigentümer").grid(
+            row=owner_row + 2, column=0, sticky="w", pady=5, padx=(0, 12)
+        )
+        ttk.Entry(frame, textvariable=self.variables["owner_name"], width=38).grid(
+            row=owner_row + 2, column=1, sticky="ew", pady=5
+        )
         ttk.Label(frame, text="Interne Notiz").grid(
-            row=len(fields),
+            row=owner_row + 3,
             column=0,
             sticky="nw",
             pady=5,
             padx=(0, 12),
         )
         self.notes_text = tk.Text(frame, width=38, height=5, wrap="word")
-        self.notes_text.grid(row=len(fields), column=1, sticky="ew", pady=5)
+        self.notes_text.grid(row=owner_row + 3, column=1, sticky="ew", pady=5)
         buttons = ttk.Frame(frame)
-        buttons.grid(row=len(fields) + 1, column=0, columnspan=2, sticky="e", pady=(16, 0))
+        buttons.grid(row=owner_row + 4, column=0, columnspan=2, sticky="e", pady=(16, 0))
         ttk.Button(buttons, text="Abbrechen", command=self.destroy).pack(side="left", padx=(0, 8))
         ttk.Button(
             buttons,
@@ -176,9 +223,15 @@ class NewAssetDialog(tk.Toplevel):
         _activate_modal_window(self, self.entries.get("label"))
 
     def _create(self) -> None:
+        owner_type = {"VEREIN": "club", "MITGLIED": "member", "EXTERN": "external"}[self.owner_type_var.get()]
         try:
             asset = self.repository.create_asset(
-                **{key: variable.get() for key, variable in self.variables.items()},
+                **{key: variable.get() for key, variable in self.variables.items() if key != "owner_name"},
+                owner_type=owner_type,
+                owner_member_id=(
+                    self.member_labels.get(self.owner_member_var.get(), "") if owner_type == "member" else ""
+                ),
+                owner_name=self.variables["owner_name"].get() if owner_type == "external" else "",
                 notes=self.notes_text.get("1.0", "end-1c"),
             )
         except RepositoryError as exc:
@@ -201,6 +254,19 @@ class EditAssetDialog(tk.Toplevel):
         self.asset_id = asset_id
         self.on_saved = on_saved
         self.asset = repository.get_asset(asset_id)
+        self.members = repository.list_members()
+        self.member_labels = {
+            f"{member.member_number or member.member_id} · {member.display_name}": member.member_id
+            for member in self.members
+        }
+        owner_member_label = next(
+            (
+                label
+                for label, member_id in self.member_labels.items()
+                if member_id == self.asset.owner_member_id
+            ),
+            "",
+        )
         self.title("Asset bearbeiten")
         self.transient(master.winfo_toplevel())
         self.resizable(False, False)
@@ -211,7 +277,18 @@ class EditAssetDialog(tk.Toplevel):
             "serial_number": tk.StringVar(value=self.asset.serial_number),
             "deposit_amount_default": tk.StringVar(value=self.asset.deposit_amount_default),
             "status": tk.StringVar(value=self.asset.status),
+            "location": tk.StringVar(value=self.asset.location),
+            "handed_over_at": tk.StringVar(value=self.asset.handed_over_at),
+            "condition": tk.StringVar(value=self.asset.condition),
+            "estimated_value": tk.StringVar(value=self.asset.estimated_value),
+            "owner_name": tk.StringVar(value=self.asset.owner_name),
         }
+        self.owner_type_var = tk.StringVar(
+            value={"club": "VEREIN", "member": "MITGLIED", "external": "EXTERN"}.get(
+                self.asset.owner_type, "VEREIN"
+            )
+        )
+        self.owner_member_var = tk.StringVar(value=owner_member_label)
         self._build_ui()
         self.bind("<Escape>", lambda _event: self.destroy())
         self.bind("<Return>", lambda _event: self._save())
@@ -227,6 +304,10 @@ class EditAssetDialog(tk.Toplevel):
             ("Inventarnummer", "inventory_number"),
             ("Seriennummer", "serial_number"),
             ("Kaution (EUR)", "deposit_amount_default"),
+            ("Standort", "location"),
+            ("Übergabedatum", "handed_over_at"),
+            ("Zustand bei Übergabe", "condition"),
+            ("Wert / Kaufpreis", "estimated_value"),
         ]
         self.entries: dict[str, ttk.Entry] = {}
         for row, (label, key) in enumerate(fields):
@@ -235,12 +316,40 @@ class EditAssetDialog(tk.Toplevel):
             entry = ttk.Entry(frame, textvariable=self.variables[key], width=38, state=state)
             entry.grid(row=row, column=1, sticky="ew", pady=5)
             self.entries[key] = entry
-        ttk.Label(frame, text="Status").grid(row=len(fields), column=0, sticky="w", pady=5, padx=(0, 12))
-        status_values = [value for key, value in (
-            ("available", "VERFUEGBAR"),
-            ("lost", "VERLOREN"),
-            ("retired", "AUSGEMUSTERT"),
-        )]
+        owner_row = len(fields)
+        ttk.Label(frame, text="Eigentümer").grid(row=owner_row, column=0, sticky="w", pady=5, padx=(0, 12))
+        ttk.Combobox(
+            frame,
+            textvariable=self.owner_type_var,
+            values=("VEREIN", "MITGLIED", "EXTERN"),
+            state="readonly",
+            width=35,
+        ).grid(row=owner_row, column=1, sticky="ew", pady=5)
+        ttk.Label(frame, text="Eigentümer-Mitglied").grid(
+            row=owner_row + 1, column=0, sticky="w", pady=5, padx=(0, 12)
+        )
+        ttk.Combobox(
+            frame,
+            textvariable=self.owner_member_var,
+            values=list(self.member_labels),
+            state="readonly",
+            width=35,
+        ).grid(row=owner_row + 1, column=1, sticky="ew", pady=5)
+        ttk.Label(frame, text="Externer Eigentümer").grid(
+            row=owner_row + 2, column=0, sticky="w", pady=5, padx=(0, 12)
+        )
+        ttk.Entry(frame, textvariable=self.variables["owner_name"], width=38).grid(
+            row=owner_row + 2, column=1, sticky="ew", pady=5
+        )
+        ttk.Label(frame, text="Status").grid(row=owner_row + 3, column=0, sticky="w", pady=5, padx=(0, 12))
+        status_values = [
+            value
+            for key, value in (
+                ("available", "VERFUEGBAR"),
+                ("lost", "VERLOREN"),
+                ("retired", "AUSGEMUSTERT"),
+            )
+        ]
         self.status_map = {
             "VERFUEGBAR": "available",
             "VERLOREN": "lost",
@@ -260,8 +369,8 @@ class EditAssetDialog(tk.Toplevel):
             state="readonly" if not issued else "disabled",
             width=35,
         )
-        self.status_box.grid(row=len(fields), column=1, sticky="ew", pady=5)
-        note_row = len(fields) + 1
+        self.status_box.grid(row=owner_row + 3, column=1, sticky="ew", pady=5)
+        note_row = owner_row + 4
         ttk.Label(frame, text="Interne Notiz").grid(row=note_row, column=0, sticky="nw", pady=5, padx=(0, 12))
         self.notes_text = tk.Text(frame, width=38, height=5, wrap="word")
         self.notes_text.grid(row=note_row, column=1, sticky="ew", pady=5)
@@ -290,6 +399,21 @@ class EditAssetDialog(tk.Toplevel):
         self.asset.inventory_number = self.variables["inventory_number"].get()
         self.asset.serial_number = self.variables["serial_number"].get()
         self.asset.notes = self.notes_text.get("1.0", "end-1c")
+        self.asset.location = self.variables["location"].get()
+        self.asset.handed_over_at = self.variables["handed_over_at"].get()
+        self.asset.condition = self.variables["condition"].get()
+        self.asset.estimated_value = self.variables["estimated_value"].get()
+        self.asset.owner_type = {"VEREIN": "club", "MITGLIED": "member", "EXTERN": "external"}[
+            self.owner_type_var.get()
+        ]
+        self.asset.owner_member_id = (
+            self.member_labels.get(self.owner_member_var.get(), "")
+            if self.asset.owner_type == "member"
+            else ""
+        )
+        self.asset.owner_name = (
+            self.variables["owner_name"].get() if self.asset.owner_type == "external" else ""
+        )
         if not self.asset.current_holder_member_id:
             self.asset.deposit_amount_default = self.variables["deposit_amount_default"].get()
             self.asset.status = self.status_map.get(self.status_var.get(), self.asset.status)
@@ -394,9 +518,7 @@ class IssueAssetDialog(tk.Toplevel):
         self.member_tree.delete(*self.member_tree.get_children())
         query = self.search_var.get().strip().casefold()
         filtered = [
-            member
-            for member in self.members
-            if not query or query in self._member_search_text(member)
+            member for member in self.members if not query or query in self._member_search_text(member)
         ]
         for member in filtered:
             self.member_tree.insert(
@@ -599,9 +721,7 @@ class IntegrityWarningDialog(tk.Toplevel):
             text="\n".join(f"• {item}" for item in self.warnings),
             style="Warning.TLabel",
             justify="left",
-        ).grid(
-            row=1, column=0, sticky="w", pady=(12, 0)
-        )
+        ).grid(row=1, column=0, sticky="w", pady=(12, 0))
         buttons = ttk.Frame(frame)
         buttons.grid(row=2, column=0, sticky="e", pady=(18, 0))
         ttk.Button(buttons, text="Nein", command=self.destroy).pack(side="left", padx=(0, 8))

src/ccma/ui/member_tab.py

@@ -3,10 +3,17 @@ from __future__ import annotations
 import tkinter as tk
 from collections.abc import Callable
 from datetime import datetime
+from decimal import Decimal
 from pathlib import Path
 from tkinter import messagebox, ttk
 
-from ccma.domain.contributions import CLAIM_STATUS_LABELS, claim_status, claim_total, money_text
+from ccma.domain.contributions import (
+    CLAIM_STATUS_LABELS,
+    claim_status,
+    claim_total,
+    money_text,
+    payment_allocated_total,
+)
 from ccma.domain.dates import age_label, date_input_hint, format_date_for_display
 from ccma.domain.models import ASSET_STATUS_LABELS, Event
 from ccma.domain.models import MEMBERSHIP_STATUS_LABELS as STATUS_LABELS
@@ -16,6 +23,7 @@ from ccma.ui.document_dialog import DocumentTemplateDialog
 from ccma.ui.file_open import open_path
 from ccma.ui.labels import display_label, storage_key
 from ccma.ui.messages import MessageAction, MessageBannerList, TabMessage
+from ccma.ui.payment_dialog import PaymentEditDialog
 from ccma.ui.scrolling import ScrollableFrame
 
 CLAIM_TABLE_COLUMNS = (
@@ -145,9 +153,11 @@ class MemberTab(ttk.Frame):
             command=self._save,
         ).grid(row=0, column=0, sticky="e")
         contribution_tab = ttk.Frame(notebook, padding=16)
+        payments_tab = ttk.Frame(notebook, padding=16)
         assets_tab = ttk.Frame(notebook, padding=16)
         documents_tab = ttk.Frame(notebook, padding=16)
         notebook.add(contribution_tab, text="Forderungen")
+        notebook.add(payments_tab, text="Zahlungen")
         notebook.add(assets_tab, text="Assets")
         notebook.add(documents_tab, text="Dokumente")
 
@@ -162,6 +172,7 @@ class MemberTab(ttk.Frame):
             (f"Geburtsdatum ({date_input_hint()})", "birth_date"),
             (f"Aufnahmebeschluss ({date_input_hint()})", "accepted_at"),
             (f"Mitglied seit ({date_input_hint()})", "membership_started_at"),
+            (f"Austrittsdatum ({date_input_hint()})", "membership_ended_at"),
         ]
         for row, (label, key) in enumerate(fields):
             variable = tk.StringVar()
@@ -256,6 +267,39 @@ class MemberTab(ttk.Frame):
         self.claims.bind("<Double-1>", lambda _event: self._open_selected_claim())
         self.claims.bind("<Return>", lambda _event: self._open_selected_claim())
 
+        payments_tab.columnconfigure(0, weight=1)
+        payments_tab.rowconfigure(1, weight=1)
+        self.payment_summary = tk.StringVar()
+        ttk.Label(payments_tab, textvariable=self.payment_summary, style="Mono.TLabel").grid(
+            row=0, column=0, sticky="w", pady=(0, 10)
+        )
+        self.payments = ttk.Treeview(
+            payments_tab,
+            columns=("date", "amount", "allocated", "available", "reference"),
+            show="headings",
+            selectmode="browse",
+        )
+        for key, title, width in (
+            ("date", "Datum", 100),
+            ("amount", "Betrag", 90),
+            ("allocated", "Zugeordnet", 90),
+            ("available", "Frei", 90),
+            ("reference", "Referenz", 320),
+        ):
+            self.payments.heading(key, text=title)
+            self.payments.column(key, width=width, anchor="w")
+        self.payments.grid(row=1, column=0, sticky="nsew")
+        self.payments.bind("<Double-1>", lambda _event: self._edit_selected_payment())
+        self.payments.bind("<Return>", lambda _event: self._edit_selected_payment())
+        payment_actions = ttk.Frame(payments_tab)
+        payment_actions.grid(row=2, column=0, sticky="e", pady=(8, 0))
+        ttk.Button(payment_actions, text="Zahlung bearbeiten", command=self._edit_selected_payment).pack(
+            side="left", padx=(0, 8)
+        )
+        ttk.Button(payment_actions, text="Zahlung löschen", command=self._delete_selected_payment).pack(
+            side="left"
+        )
+
         assets_tab.columnconfigure(0, weight=1)
         assets_tab.rowconfigure(1, weight=1)
         self.assets_summary = tk.StringVar()
@@ -304,9 +348,7 @@ class MemberTab(ttk.Frame):
             style="Accent.TButton",
             command=self._create_document,
         ).pack(side="left", padx=(0, 8))
-        ttk.Button(document_buttons, text="Dateiordner öffnen", command=self._open_files).pack(
-            side="left"
-        )
+        ttk.Button(document_buttons, text="Dateiordner öffnen", command=self._open_files).pack(side="left")
         self.documents = ttk.Treeview(
             documents_tab,
             columns=("name", "type", "modified", "size"),
@@ -424,6 +466,7 @@ class MemberTab(ttk.Frame):
             "birth_date",
             "accepted_at",
             "membership_started_at",
+            "membership_ended_at",
             "mandate_signed_at",
             "mandate_revoked_at",
         }
@@ -456,10 +499,12 @@ class MemberTab(ttk.Frame):
 
     def _refresh_contributions(self) -> None:
         self.claims.delete(*self.claims.get_children())
+        self.payments.delete(*self.payments.get_children())
         try:
             data = self.repository.get_contributions(self.member_id)
         except RepositoryError as exc:
             self.contribution_summary.set(f"FEHLER: {exc}")
+            self.payment_summary.set(f"FEHLER: {exc}")
             return
         claims = sorted(
             data.claims,
@@ -481,7 +526,37 @@ class MemberTab(ttk.Frame):
                     CLAIM_STATUS_LABELS.get(status, status.upper()),
                 ),
             )
+        for payment in sorted(
+            data.payments,
+            key=lambda item: (str(item.get("date", "")), str(item.get("created_at", ""))),
+            reverse=True,
+        ):
+            payment_id = str(payment.get("payment_id", ""))
+            amount = payment.get("amount", "0")
+            allocated = payment_allocated_total(data, payment_id)
+            available = max(Decimal(str(amount)) - allocated, Decimal("0"))
+            self.payments.insert(
+                "",
+                "end",
+                iid=payment_id,
+                values=(
+                    format_date_for_display(str(payment.get("date", ""))),
+                    f"{money_text(amount)} EUR",
+                    f"{money_text(allocated)} EUR",
+                    f"{money_text(available)} EUR",
+                    payment.get("reference", ""),
+                ),
+            )
         self.contribution_summary.set(f"{len(data.claims)} Forderungen · {len(data.payments)} Zahlungen")
+        total_amount = sum((Decimal(str(item.get("amount", "0"))) for item in data.payments), Decimal("0"))
+        total_allocated = sum(
+            (payment_allocated_total(data, str(item.get("payment_id", ""))) for item in data.payments),
+            Decimal("0"),
+        )
+        self.payment_summary.set(
+            f"{len(data.payments)} Zahlungen · Gesamt {money_text(total_amount)} EUR · "
+            f"Frei {money_text(max(total_amount - total_allocated, Decimal('0')))} EUR"
+        )
 
     def _toggle_claim_sort(self, column: str) -> None:
         if self.claim_sort_column == column:
@@ -507,6 +582,46 @@ class MemberTab(ttk.Frame):
         if selected and not selected[0].startswith("missing-id-"):
             self.on_open_claim(self.member_id, selected[0])
 
+    def _edit_selected_payment(self) -> None:
+        selected = self.payments.selection()
+        if not selected:
+            messagebox.showinfo("Zahlung auswählen", "Bitte eine Zahlung auswählen.", parent=self)
+            return
+        try:
+            PaymentEditDialog(
+                self,
+                self.repository,
+                self.member_id,
+                selected[0],
+                self._payment_changed,
+            )
+        except RepositoryError as exc:
+            messagebox.showerror("Zahlung konnte nicht geöffnet werden", str(exc), parent=self)
+
+    def _delete_selected_payment(self) -> None:
+        selected = self.payments.selection()
+        if not selected:
+            messagebox.showinfo("Zahlung auswählen", "Bitte eine Zahlung auswählen.", parent=self)
+            return
+        values = self.payments.item(selected[0], "values")
+        label = f"{values[0]} · {values[1]}" if values else selected[0]
+        if not messagebox.askyesno(
+            "Zahlung wirklich löschen?",
+            f"Die Zahlung {label} und alle ihre Zuordnungen werden endgültig gelöscht.",
+            parent=self,
+        ):
+            return
+        try:
+            self.repository.delete_payment(self.member_id, selected[0])
+        except RepositoryError as exc:
+            messagebox.showerror("Zahlung konnte nicht gelöscht werden", str(exc), parent=self)
+            return
+        self._payment_changed()
+
+    def _payment_changed(self) -> None:
+        self.refresh()
+        self.on_changed()
+
     def _refresh_documents(self) -> None:
         self.documents.delete(*self.documents.get_children())
         self.document_paths.clear()
@@ -536,8 +651,11 @@ class MemberTab(ttk.Frame):
 
     def _refresh_assets(self) -> None:
         self.assets_tree.delete(*self.assets_tree.get_children())
-        assets = self.repository.list_member_assets(self.member_id)
-        self.assets_summary.set(f"{len(assets)} ausgegebene Assets")
+        held_assets = self.repository.list_member_assets(self.member_id)
+        owned_assets = self.repository.list_member_owned_assets(self.member_id)
+        assets_by_id = {asset.asset_id: asset for asset in [*held_assets, *owned_assets]}
+        assets = list(assets_by_id.values())
+        self.assets_summary.set(f"{len(owned_assets)} im Eigentum · {len(held_assets)} vom Verein erhalten")
         for asset in assets:
             self.assets_tree.insert(
                 "",
@@ -547,7 +665,13 @@ class MemberTab(ttk.Frame):
                     asset.label,
                     asset.category,
                     asset.inventory_number,
-                    ASSET_STATUS_LABELS.get(asset.status, asset.status),
+                    (
+                        "EIGENTUM · DEM VEREIN ÜBERLASSEN"
+                        if asset.owner_member_id == self.member_id and asset.custody_type == "club"
+                        else "EIGENTUM"
+                        if asset.owner_member_id == self.member_id
+                        else ASSET_STATUS_LABELS.get(asset.status, asset.status)
+                    ),
                 ),
             )
 

src/ccma/ui/payment_dialog.py

@@ -0,0 +1,263 @@
+from __future__ import annotations
+
+import tkinter as tk
+from collections.abc import Callable
+from decimal import Decimal, InvalidOperation
+from tkinter import messagebox, ttk
+
+from ccma.domain.contributions import (
+    claim_balance,
+    claim_status,
+    decimal_value,
+    money_text,
+)
+from ccma.domain.dates import date_input_hint, format_date_for_display
+from ccma.storage.repository import MemberRepository, RepositoryError
+
+
+class PaymentEditDialog(tk.Toplevel):
+    def __init__(
+        self,
+        master: tk.Misc,
+        repository: MemberRepository,
+        member_id: str,
+        payment_id: str,
+        on_saved: Callable[[], None],
+    ):
+        super().__init__(master)
+        self.repository = repository
+        self.member_id = member_id
+        self.payment_id = payment_id
+        self.on_saved = on_saved
+        self.data = repository.get_contributions(member_id)
+        self.payment = next(
+            (
+                payment
+                for payment in self.data.payments
+                if str(payment.get("payment_id", "")) == payment_id
+            ),
+            None,
+        )
+        if self.payment is None:
+            raise RepositoryError("Zahlung nicht gefunden.")
+        self.allocations = self._current_allocations()
+        self.claims_by_id = {
+            str(claim.get("claim_id", "")): claim
+            for claim in self.data.claims
+            if str(claim.get("claim_id", ""))
+            and (
+                claim_status(self.data, claim) != "cancelled"
+                or str(claim.get("claim_id", "")) in self.allocations
+            )
+        }
+        self.capacities = self._claim_capacities()
+
+        self.title("Zahlung bearbeiten")
+        self.transient(master.winfo_toplevel())
+        self.geometry("880x560")
+        self.minsize(720, 460)
+        self.protocol("WM_DELETE_WINDOW", self.destroy)
+        self.bind("<Escape>", lambda _event: self.destroy())
+        self._build_ui()
+        self._refresh_claims()
+        self.after_idle(self._activate)
+
+    def _current_allocations(self) -> dict[str, str]:
+        totals: dict[str, Decimal] = {}
+        for allocation in self.data.allocations:
+            if str(allocation.get("payment_id", "")) != self.payment_id:
+                continue
+            claim_id = str(allocation.get("claim_id", ""))
+            totals[claim_id] = totals.get(claim_id, Decimal("0")) + decimal_value(
+                allocation.get("amount", "0")
+            )
+        return {claim_id: money_text(amount) for claim_id, amount in totals.items() if claim_id}
+
+    def _claim_capacities(self) -> dict[str, Decimal]:
+        capacities = {}
+        for claim_id, claim in self.claims_by_id.items():
+            current = decimal_value(self.allocations.get(claim_id, "0"))
+            capacities[claim_id] = max(claim_balance(self.data, claim) + current, Decimal("0"))
+        return capacities
+
+    def _build_ui(self) -> None:
+        self.columnconfigure(0, weight=1)
+        self.rowconfigure(1, weight=1)
+        form = ttk.Frame(self, padding=16)
+        form.grid(row=0, column=0, sticky="ew")
+        form.columnconfigure(1, weight=1)
+        self.variables = {
+            "date": tk.StringVar(
+                value=format_date_for_display(str(self.payment.get("date", "")))
+            ),
+            "amount": tk.StringVar(value=str(self.payment.get("amount", ""))),
+            "gnucash": tk.StringVar(value=str(self.payment.get("gnucash_transaction_id", ""))),
+            "reference": tk.StringVar(value=str(self.payment.get("reference", ""))),
+        }
+        fields = (
+            (f"Zahlungsdatum ({date_input_hint()})", "date"),
+            ("Zahlungsbetrag", "amount"),
+            ("GnuCash-ID", "gnucash"),
+            ("Referenz", "reference"),
+        )
+        for row, (label, key) in enumerate(fields):
+            ttk.Label(form, text=label).grid(row=row, column=0, sticky="w", padx=(0, 12), pady=4)
+            ttk.Entry(form, textvariable=self.variables[key], width=70).grid(
+                row=row, column=1, sticky="ew", pady=4
+            )
+        self.variables["amount"].trace_add("write", lambda *_args: self._refresh_totals())
+
+        allocation_frame = ttk.LabelFrame(self, text="Aufteilung auf Forderungen", padding=12)
+        allocation_frame.grid(row=1, column=0, sticky="nsew", padx=16, pady=(0, 12))
+        allocation_frame.columnconfigure(0, weight=1)
+        allocation_frame.rowconfigure(0, weight=1)
+        self.claims = ttk.Treeview(
+            allocation_frame,
+            columns=("title", "due", "available", "allocated"),
+            show="headings",
+            selectmode="browse",
+        )
+        for key, title, width in (
+            ("title", "Forderung", 300),
+            ("due", "Fällig", 110),
+            ("available", "Maximal zuordenbar", 150),
+            ("allocated", "Aktuell zugeordnet", 150),
+        ):
+            self.claims.heading(key, text=title)
+            self.claims.column(key, width=width, anchor="w")
+        self.claims.grid(row=0, column=0, sticky="nsew")
+        scrollbar = ttk.Scrollbar(allocation_frame, orient="vertical", command=self.claims.yview)
+        scrollbar.grid(row=0, column=1, sticky="ns")
+        self.claims.configure(yscrollcommand=scrollbar.set)
+        self.claims.bind("<<TreeviewSelect>>", self._select_claim)
+
+        allocation_actions = ttk.Frame(allocation_frame)
+        allocation_actions.grid(row=1, column=0, columnspan=2, sticky="ew", pady=(10, 0))
+        ttk.Label(allocation_actions, text="Betrag für ausgewählte Forderung").pack(side="left")
+        self.allocation_var = tk.StringVar()
+        ttk.Entry(allocation_actions, textvariable=self.allocation_var, width=14).pack(
+            side="left", padx=(8, 8)
+        )
+        ttk.Button(allocation_actions, text="Zuordnung setzen", command=self._set_allocation).pack(
+            side="left"
+        )
+        ttk.Button(allocation_actions, text="Zuordnung lösen", command=self._remove_allocation).pack(
+            side="left", padx=(8, 0)
+        )
+        self.total_var = tk.StringVar()
+        ttk.Label(allocation_actions, textvariable=self.total_var, style="Mono.TLabel").pack(
+            side="right"
+        )
+
+        buttons = ttk.Frame(self, padding=(16, 0, 16, 16))
+        buttons.grid(row=2, column=0, sticky="e")
+        ttk.Button(buttons, text="Abbrechen", command=self.destroy).pack(side="left", padx=(0, 8))
+        ttk.Button(
+            buttons,
+            text="Zahlung speichern",
+            style="Accent.TButton",
+            command=self._save,
+        ).pack(side="left")
+
+    def _activate(self) -> None:
+        try:
+            self.deiconify()
+            self.lift()
+            self.focus_force()
+            self.grab_set()
+        except tk.TclError:
+            return
+
+    def _refresh_claims(self) -> None:
+        selected = self.claims.selection()
+        self.claims.delete(*self.claims.get_children())
+        ordered = sorted(
+            self.claims_by_id.items(),
+            key=lambda item: (
+                str(item[1].get("due_date", "")),
+                str(item[1].get("title", "")).casefold(),
+            ),
+        )
+        for claim_id, claim in ordered:
+            self.claims.insert(
+                "",
+                "end",
+                iid=claim_id,
+                values=(
+                    claim.get("title", "Forderung"),
+                    format_date_for_display(str(claim.get("due_date", ""))),
+                    f"{money_text(self.capacities[claim_id])} EUR",
+                    f"{self.allocations.get(claim_id, '0.00')} EUR",
+                ),
+            )
+        if selected and self.claims.exists(selected[0]):
+            self.claims.selection_set(selected[0])
+        self._refresh_totals()
+
+    def _select_claim(self, _event=None) -> None:
+        selected = self.claims.selection()
+        if selected:
+            self.allocation_var.set(self.allocations.get(selected[0], "0.00"))
+
+    def _set_allocation(self) -> None:
+        selected = self.claims.selection()
+        if not selected:
+            messagebox.showerror("Forderung auswählen", "Bitte eine Forderung auswählen.", parent=self)
+            return
+        try:
+            amount = decimal_value(self.allocation_var.get(), "Zuordnung")
+        except ValueError as exc:
+            messagebox.showerror("Ungültige Zuordnung", str(exc), parent=self)
+            return
+        capacity = self.capacities[selected[0]]
+        if amount < 0 or amount > capacity:
+            messagebox.showerror(
+                "Ungültige Zuordnung",
+                f"Für diese Forderung können höchstens {money_text(capacity)} EUR zugeordnet werden.",
+                parent=self,
+            )
+            return
+        if amount:
+            self.allocations[selected[0]] = money_text(amount)
+        else:
+            self.allocations.pop(selected[0], None)
+        self._refresh_claims()
+
+    def _remove_allocation(self) -> None:
+        selected = self.claims.selection()
+        if not selected:
+            messagebox.showerror("Forderung auswählen", "Bitte eine Forderung auswählen.", parent=self)
+            return
+        self.allocations.pop(selected[0], None)
+        self.allocation_var.set("0.00")
+        self._refresh_claims()
+
+    def _refresh_totals(self) -> None:
+        allocated = sum(
+            (decimal_value(value) for value in self.allocations.values()), Decimal("0")
+        )
+        try:
+            payment_amount = decimal_value(self.variables["amount"].get())
+            free = payment_amount - allocated
+            self.total_var.set(
+                f"Zugeordnet: {money_text(allocated)} EUR · Frei: {money_text(free)} EUR"
+            )
+        except (ValueError, InvalidOperation):
+            self.total_var.set(f"Zugeordnet: {money_text(allocated)} EUR · Betrag ungültig")
+
+    def _save(self) -> None:
+        try:
+            self.repository.update_payment(
+                self.member_id,
+                self.payment_id,
+                payment_date=self.variables["date"].get(),
+                amount=self.variables["amount"].get(),
+                allocations=self.allocations,
+                gnucash_transaction_id=self.variables["gnucash"].get(),
+                reference=self.variables["reference"].get(),
+            )
+        except RepositoryError as exc:
+            messagebox.showerror("Zahlung konnte nicht gespeichert werden", str(exc), parent=self)
+            return
+        self.destroy()
+        self.on_saved()

src/ccma/ui/work_tabs.py

@@ -31,7 +31,9 @@ ASSET_TABLE_COLUMNS = (
     ("category", "Kategorie", 140),
     ("inventory_number", "Inventarnummer", 140),
     ("status", "Status", 140),
-    ("holder", "Mitglied", 240),
+    ("owner", "Eigentümer", 240),
+    ("holder", "Gewahrsam", 240),
+    ("location", "Standort", 180),
 )
 
 
@@ -77,7 +79,7 @@ def _filter_label_frame(parent: tk.Misc) -> ttk.LabelFrame:
     return titled_frame(parent, "// FILTER")
 
 
-def _asset_table_value(asset: Asset, column: str, holder_label: str) -> str:
+def _asset_table_value(asset: Asset, column: str, holder_label: str, owner_label: str = "") -> str:
     if column == "label":
         return asset.label
     if column == "category":
@@ -88,6 +90,10 @@ def _asset_table_value(asset: Asset, column: str, holder_label: str) -> str:
         return ASSET_STATUS_LABELS.get(asset.status, asset.status)
     if column == "holder":
         return holder_label
+    if column == "owner":
+        return owner_label
+    if column == "location":
+        return asset.location
     return ""
 
 
@@ -429,6 +435,7 @@ class AssetsTab(ttk.Frame):
                 asset,
                 self.sort_column,
                 self.resolve_holder_label(asset.current_holder_member_id),
+                self._owner_label(asset),
             ).casefold(),
             reverse=self.sort_descending,
         )
@@ -447,11 +454,20 @@ class AssetsTab(ttk.Frame):
                     asset.category,
                     asset.inventory_number,
                     ASSET_STATUS_LABELS.get(asset.status, asset.status),
+                    self._owner_label(asset),
                     self.resolve_holder_label(asset.current_holder_member_id),
+                    asset.location,
                 ),
             )
         self._update_actions()
 
+    def _owner_label(self, asset: Asset) -> str:
+        if asset.owner_type == "club":
+            return "Verein"
+        if asset.owner_type == "member":
+            return self.resolve_holder_label(asset.owner_member_id)
+        return asset.owner_name or "Extern"
+
     def _toggle_sort(self, column: str) -> None:
         if self.sort_column == column:
             self.sort_descending = not self.sort_descending