edit and delete, on both screens

the screens could show a calendar and an address book and change neither. this
adds a pencil and a bin to every event and every card, with a confirm on the bin.

three things worth defending.

THE HREF IS THE ADDRESS, and the listing now carries it. it used to return only
the object's data, which is enough to show something and not enough to change
it. deriving `<uid>.ics` was the obvious shortcut and is wrong: a .ics filename
only conventionally matches the uid — radicale stores what the writing client
chose — so it works for everything officer wrote and misses everything a phone
did. proved immediately: this machine's own calendar holds
62970EC7-47B1-4214-858E-85C32C2476A5.ics, written by an iphone.

READ, PATCH, PUT — NEVER REBUILD. an event is a file with far more in it than
these screens show: alarms, attendees, RRULEs, every X- property. rebuilding it
from the fields on screen would silently drop all of that, and an edit that
quietly deletes half an event is worse than no editing. so a save reads the
original text, replaces only the lines it owns, and puts the whole file back.
verified on a real event: 22 lines before, 22 after, one changed.

THE EDITOR IS DELIBERATELY SMALL. title and place for an event, name/email/phone
for a card. times and recurrence are where an editor does damage, and a
half-editor that rewrites an RRULE it does not understand is the thing this
avoids. `setProperty` also escapes commas, semicolons and newlines, because a
raw comma silently splits an iCalendar TEXT value into parts.

the sidecar grew GET/PUT/DELETE on /_officer/item, above the `collection is
required` guard — they take an href rather than a collection, and sitting below
it they answered 400 forever. both check the href is inside this user's own tree
even though X-Remote-User already scopes radicale: an href from a request body
is attacker-shaped input either way.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Officer-Session: 656f5c85-e49a-4f1f-b9f3-042a04b4d043

web/dav/shared.ts

@@ -14,6 +14,8 @@ export type DavCollection = {
 
 export type CalendarEvent = {
   uid: string;
+  /** The DAV href — where this event lives. What edit and delete address; never derived from the uid. */
+  href?: string;
   summary: string;
   description?: string;
   location?: string;
@@ -27,6 +29,8 @@ export type CalendarEvent = {
 
 export type DavContact = {
   uid: string;
+  /** The DAV href — where this contact lives. What edit and delete address; never derived from the uid. */
+  href?: string;
   fullName: string;
   emails: string[];
   phones: string[];