Remove duration_minutes from event templates, auto-prefill event times

- Drop duration_minutes column from event_templates (model, schema, migration)
- Remove duration field from TemplateForm UI and TypeScript types
- EventForm now defaults start to current date/time and end to +1 hour
  when no initial values are provided (new events and template-based events)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/alembic/versions/013_drop_template_duration.py

@@ -0,0 +1,27 @@
+"""drop duration_minutes from event_templates
+
+Revision ID: 013
+Revises: 012
+Create Date: 2026-02-23
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "013"
+down_revision = "012"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.drop_column("event_templates", "duration_minutes")
+
+
+def downgrade() -> None:
+    op.add_column(
+        "event_templates",
+        sa.Column("duration_minutes", sa.Integer(), server_default="60", nullable=False),
+    )

backend/app/models/event_template.py

@@ -1,4 +1,4 @@
-from sqlalchemy import String, Text, Integer, Boolean, ForeignKey
+from sqlalchemy import String, Text, Boolean, ForeignKey, Integer
 from sqlalchemy.orm import Mapped, mapped_column
 from datetime import datetime
 from typing import Optional
@@ -12,7 +12,6 @@ class EventTemplate(Base):
     name: Mapped[str] = mapped_column(String(255), nullable=False)
     title: Mapped[str] = mapped_column(String(255), nullable=False)
     description: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
-    duration_minutes: Mapped[int] = mapped_column(Integer, default=60)
     calendar_id: Mapped[Optional[int]] = mapped_column(
         Integer, ForeignKey("calendars.id", ondelete="SET NULL"), nullable=True
     )

backend/app/schemas/event_template.py

@@ -7,7 +7,6 @@ class EventTemplateCreate(BaseModel):
     name: str
     title: str
     description: Optional[str] = None
-    duration_minutes: int = 60
     calendar_id: Optional[int] = None
     recurrence_rule: Optional[str] = None
     all_day: bool = False
@@ -19,7 +18,6 @@ class EventTemplateUpdate(BaseModel):
     name: Optional[str] = None
     title: Optional[str] = None
     description: Optional[str] = None
-    duration_minutes: Optional[int] = None
     calendar_id: Optional[int] = None
     recurrence_rule: Optional[str] = None
     all_day: Optional[bool] = None
@@ -32,7 +30,6 @@ class EventTemplateResponse(BaseModel):
     name: str
     title: str
     description: Optional[str]
-    duration_minutes: int
     calendar_id: Optional[int]
     recurrence_rule: Optional[str]
     all_day: bool

frontend/src/components/calendar/EventForm.tsx

@@ -75,12 +75,29 @@ function parseRecurrenceRule(raw?: string): RecurrenceRule | null {
   }
 }
 
+function nowLocal(): string {
+  const now = new Date();
+  const pad = (n: number) => n.toString().padStart(2, '0');
+  return `${now.getFullYear()}-${pad(now.getMonth() + 1)}-${pad(now.getDate())}T${pad(now.getHours())}:${pad(now.getMinutes())}`;
+}
+
+function plusOneHour(dt: string): string {
+  const d = new Date(dt);
+  d.setHours(d.getHours() + 1);
+  const pad = (n: number) => n.toString().padStart(2, '0');
+  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`;
+}
+
 export default function EventForm({ event, initialStart, initialEnd, initialAllDay, editScope, onClose }: EventFormProps) {
   const queryClient = useQueryClient();
   const { data: calendars = [] } = useCalendars();
   const isAllDay = event?.all_day ?? initialAllDay ?? false;
-  const rawStart = event?.start_datetime || initialStart || '';
+
-  const rawEnd = event?.end_datetime || initialEnd || '';
+  // Default to current time / +1 hour when creating a new event with no selection
+  const defaultStart = nowLocal();
+  const defaultEnd = plusOneHour(defaultStart);
+  const rawStart = event?.start_datetime || initialStart || defaultStart;
+  const rawEnd = event?.end_datetime || initialEnd || defaultEnd;
 
   const defaultCalendar = calendars.find((c) => c.is_default);
   const initialCalendarId = event?.calendar_id?.toString() || defaultCalendar?.id?.toString() || '';

frontend/src/components/calendar/TemplateForm.tsx

@@ -45,7 +45,6 @@ export default function TemplateForm({ template, onClose }: TemplateFormProps) {
     name: template?.name || '',
     title: template?.title || '',
     description: template?.description || '',
-    duration_minutes: template?.duration_minutes?.toString() || '60',
     calendar_id: template?.calendar_id?.toString() || '',
     location_id: template?.location_id?.toString() || '',
     all_day: template?.all_day || false,
@@ -58,7 +57,6 @@ export default function TemplateForm({ template, onClose }: TemplateFormProps) {
         name: data.name,
         title: data.title,
         description: data.description || null,
-        duration_minutes: parseInt(data.duration_minutes) || 60,
         calendar_id: data.calendar_id ? parseInt(data.calendar_id) : null,
         location_id: data.location_id ? parseInt(data.location_id) : null,
         all_day: data.all_day,
@@ -128,19 +126,6 @@ export default function TemplateForm({ template, onClose }: TemplateFormProps) {
             />
           </div>
 
-          <div className="grid grid-cols-2 gap-4">
-            <div className="space-y-2">
-              <Label htmlFor="tmpl-duration">Duration (min)</Label>
-              <Input
-                id="tmpl-duration"
-                type="number"
-                min={5}
-                max={1440}
-                value={formData.duration_minutes}
-                onChange={(e) => setFormData({ ...formData, duration_minutes: e.target.value })}
-              />
-            </div>
-
           <div className="space-y-2">
             <Label htmlFor="tmpl-calendar">Calendar</Label>
             <Select
@@ -154,7 +139,6 @@ export default function TemplateForm({ template, onClose }: TemplateFormProps) {
               ))}
             </Select>
           </div>
-          </div>
 
           <div className="space-y-2">
             <Label htmlFor="tmpl-location">Location</Label>

frontend/src/types/index.ts

@@ -232,7 +232,6 @@ export interface EventTemplate {
   name: string;
   title: string;
   description?: string;
-  duration_minutes: number;
   calendar_id?: number;
   recurrence_rule?: string;
   all_day: boolean;