feat: allow deleting housekeeper tasks

src/ccma/ui/work_tabs.py

@@ -1,7 +1,7 @@
 import tkinter as tk
 from collections import Counter
 from collections.abc import Callable
-from tkinter import ttk
+from tkinter import messagebox, ttk
 
 from ccma.domain.dates import format_date_for_display
 from ccma.domain.models import MEMBERSHIP_STATUS_LABELS, HousekeeperFinding, Member
@@ -188,12 +188,14 @@ class HousekeeperTab(ttk.Frame):
         findings: list[HousekeeperFinding],
         on_open_member: Callable[[str], None],
         on_refresh: Callable[[], list[HousekeeperFinding]],
+        on_delete: Callable[[str], list[HousekeeperFinding]],
         on_close: Callable[[], None],
     ):
         super().__init__(master, padding=12)
         self.findings = findings
         self.on_open_member = on_open_member
         self.on_refresh = on_refresh
+        self.on_delete = on_delete
         self.on_close = on_close
         self._build_ui()
 
@@ -241,6 +243,13 @@ class HousekeeperTab(ttk.Frame):
             style="Status.TLabel",
         )
         self.detail_label.grid(row=0, column=0, sticky="ew")
+        self.delete_button = ttk.Button(
+            details,
+            text="Task löschen",
+            command=self._delete_selected,
+            state="disabled",
+        )
+        self.delete_button.grid(row=0, column=1, sticky="ne", padx=(12, 0))
         details.bind(
             "<Configure>",
             lambda event: self.detail_label.configure(wraplength=max(300, event.width - 32)),
@@ -254,6 +263,7 @@ class HousekeeperTab(ttk.Frame):
     def _render(self) -> None:
         self.tree.delete(*self.tree.get_children())
         self.detail_var.set("Eintrag auswählen, um Details anzuzeigen.")
+        self.delete_button.configure(state="disabled")
         self.title_var.set(f"HAUSMEISTER · {len(self.findings)} Vorgänge")
         for index, finding in enumerate(self.findings):
             self.tree.insert(
@@ -267,11 +277,28 @@ class HousekeeperTab(ttk.Frame):
         selected = self.tree.selection()
         if not selected:
             self.detail_var.set("Eintrag auswählen, um Details anzuzeigen.")
+            self.delete_button.configure(state="disabled")
             return
         index = int(selected[0])
         if index >= len(self.findings):
             return
         self.detail_var.set(_finding_details(self.findings[index]))
+        self.delete_button.configure(state="normal" if self.findings[index].key else "disabled")
+
+    def _delete_selected(self) -> None:
+        selected = self.tree.selection()
+        if not selected:
+            return
+        finding = self.findings[int(selected[0])]
+        if not finding.key or not messagebox.askyesno(
+            "Hausmeister-Task löschen",
+            f"Task wirklich löschen?\n\n{finding.title}\n\n"
+            "Falls die Ursache weiter besteht, wird er beim nächsten Lauf neu angelegt.",
+            parent=self,
+        ):
+            return
+        self.findings = self.on_delete(finding.key)
+        self._render()
 
     def _open_selected(self) -> None:
         selected = self.tree.selection()
@@ -281,6 +308,8 @@ class HousekeeperTab(ttk.Frame):
 
 def _finding_details(finding: HousekeeperFinding) -> str:
     lines = [f"{finding.severity.upper()} · {finding.code}", finding.title]
+    if finding.key:
+        lines.append(f"Key: {finding.key}")
     if finding.due_date:
         lines.append(f"Fällig: {format_date_for_display(finding.due_date.isoformat())}")
     if finding.detail: