fix: back button returns to project when note/task has a project, otherwise to Knowledge

frontend/src/views/NoteEditorView.vue

@@ -402,7 +402,7 @@ async function confirmDelete() {
     await store.deleteNote(noteId.value);
     dirty.value = false;
     toast.show("Note deleted");
-    router.push("/notes");
+    router.push(projectId.value ? `/projects/${projectId.value}` : "/");
   } catch {
     toast.show("Failed to delete note", "error");
   }
@@ -445,7 +445,7 @@ onUnmounted(() => assist.clearSelection());
   <main class="editor-page note-editor-page">
     <div class="editor-header">
       <div class="toolbar">
-        <router-link to="/notes" class="btn-back">← Notes</router-link>
+        <router-link :to="projectId ? `/projects/${projectId}` : '/'" class="btn-back">← {{ projectId ? 'Project' : 'Knowledge' }}</router-link>
         <button class="btn-save" @click="save" :disabled="saving">
           {{ saving ? "Saving..." : "Save" }}
         </button>

frontend/src/views/TaskEditorView.vue

@@ -362,7 +362,7 @@ async function confirmDelete() {
     await store.deleteTask(taskId.value);
     dirty.value = false;
     toast.show("Task deleted");
-    router.push("/tasks");
+    router.push(projectId.value ? `/projects/${projectId.value}` : "/");
   } catch {
     toast.show("Failed to delete task", "error");
   }
@@ -410,7 +410,7 @@ useEditorGuards(dirty, save);
   <main class="editor-page task-editor-page">
     <div class="editor-header">
       <div class="toolbar">
-        <router-link to="/tasks" class="btn-back">← Tasks</router-link>
+        <router-link :to="projectId ? `/projects/${projectId}` : '/'" class="btn-back">← {{ projectId ? 'Project' : 'Knowledge' }}</router-link>
         <button class="btn-save" @click="save" :disabled="saving">
           {{ saving ? "Saving..." : "Save" }}
         </button>