2026.08.27.03 — a filter on both screens

a calendar of a few hundred events and an address book of a few hundred cards are
both lists you scroll until you give up. one box on each header narrows them.

CLIENT SIDE, because the data is already here: both screens fetch a whole
collection in one request and hold it, so filtering is a string comparison over
what is in hand. a round trip per keystroke would be slower, would need a search
endpoint on the sidecar, and would put a spinner where a person expects a list to
narrow as they type.

ACCENT-INSENSITIVE, and that is the half that decides whether this is usable
here: these contacts are portuguese, and a box where "jose" does not find "José"
is a box nobody uses twice. NFD splits the letter from its accent and the range
strips what is left, so it matches in both directions — "josé" finds "Jose" too.

every term must match somewhere, not all in one field, so "ana lisboa" finds the
ana whose address is in lisbon. events match on their start as well, which is an
ISO string, so "2026-08-29" narrows to a day without anything having to parse it.

the count in the header becomes "12 of 340" while filtering, and a filter that
matches nothing says so by name — otherwise it reads as a calendar that lost its
events.

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

manifest.ts

@@ -9,7 +9,7 @@ import type { PluginManifest } from '@@/plugins/manifest';
  */
 export const manifest: PluginManifest = {
   publisher: 'officerdev',
-  version: '2026.08.27.02',
+  version: '2026.08.27.03',
   platform: '>=1.0.0',
 
   /**

skills/calendar-and-contacts/SKILL.md

@@ -1,5 +1,6 @@
 ---
-name: Calendar and contacts
+name: calendar-and-contacts
+title: Calendar and contacts
 description: Use when the owner asks you to add, move, cancel or look up an event, or to add, remove or find a contact — "dinner Saturday with my wife", "move that to 9", "when am I seeing the CEO", "add Peter Griffin, this number". Carries the JSON routes, the one credential, and the timezone trap that puts every event an hour out.
 version: 2
 ---

web/dav/CalendarView.tsx

@@ -3,6 +3,7 @@ import { useState } from 'react';
 import { CalendarDays, MapPin, Repeat, Pencil, Trash2, Check, X, Plus } from 'lucide-react';
 import { useCalendarEvents, useSelectedCollection } from './useDavData';
 import { useDavEdit, CREATING, type NewEvent } from './useDavEdit';
+import { useFilter, matches } from './useFilter';
 import { useTranslation } from 'officerdev';
 
 // Right panel of /calendar. Deliberately a grouped agenda list, not a month grid: the sidecar returns
@@ -39,7 +40,14 @@ const blankDraft = (): Draft => {
   const start = new Date(Date.now() + 60 * 60 * 1000);
   start.setMinutes(0, 0, 0);
   const end = new Date(start.getTime() + 60 * 60 * 1000);
-  return { summary: '', location: '', date: localDate(start), start: localTime(start), end: localTime(end), allDay: false };
+  return {
+    summary: '',
+    location: '',
+    date: localDate(start),
+    start: localTime(start),
+    end: localTime(end),
+    allDay: false,
+  };
 };
 
 /**
@@ -71,21 +79,29 @@ export const CalendarView = () => {
   const [draft, setDraft] = useState({ summary: '', location: '' });
   const [confirming, setConfirming] = useState<string | null>(null);
   const [draftNew, setDraftNew] = useState<Draft | null>(null);
+  const filter = useFilter('Filter events');
 
   if (loadingCollections) return <Placeholder text="Loading calendars…" />;
   if (!selected) return <Placeholder text="No calendars yet. Create one from a CalDAV client." />;
 
+  // Title, place, notes — and the DAY, so "saturday" or "2026-08-29" narrows to a date the way a person
+  // expects. `start` is an ISO string, which is why the date is searchable at all without parsing it.
+  const shown = events.filter((ev) => matches(filter.query, ev.summary, ev.location, ev.description, ev.start));
+
   // Not an early return any more: the header carries the only way to ADD an event, and a calendar that
-  // is empty or still loading is exactly when somebody wants it.
+  // is empty or still loading is exactly when somebody wants it. A filter that matches nothing says so,
+  // rather than looking like a calendar that lost its events.
   const notice = error
     ? t('dav.readFailed', { name: selected.displayName, reason: String(error) })
     : isLoading
       ? 'Loading events…'
       : events.length === 0
         ? `${selected.displayName} has no events.`
-        : null;
+        : shown.length === 0
+          ? `No event matches “${filter.query}”.`
+          : null;
 
-  const sorted = [...events].sort((a, b) => (a.start ?? '').localeCompare(b.start ?? ''));
+  const sorted = [...shown].sort((a, b) => (a.start ?? '').localeCompare(b.start ?? ''));
   const days: Array<{ key: string; events: CalendarEvent[] }> = [];
   for (const ev of sorted) {
     const key = dayKey(ev);
@@ -110,9 +126,11 @@ export const CalendarView = () => {
         <div className="min-w-0">
           <div className="truncate text-sm font-semibold leading-tight">{selected.displayName}</div>
           <div className="text-xs text-muted-foreground">
-            {events.length} {events.length === 1 ? 'event' : 'events'}
+            {filter.query ? `${shown.length} of ${events.length}` : events.length}{' '}
+            {events.length === 1 ? 'event' : 'events'}
           </div>
         </div>
+        {filter.input}
         <button
           onClick={() => setDraftNew((d) => (d ? null : blankDraft()))}
           className="flex shrink-0 items-center gap-1.5 rounded-lg bg-primary/10 px-3 py-1.5 text-xs font-medium text-primary transition-colors hover:bg-primary/20"
@@ -196,132 +214,135 @@ export const CalendarView = () => {
 
           {notice && <Placeholder text={notice} />}
           {days.map((day) => (
-          <section key={day.key} className="flex flex-col gap-2">
-            <h2 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground">
-              {formatDay(day.key)}
-            </h2>
-            {day.events.map((ev) => (
-              <article key={ev.uid} className="flex gap-3 rounded-xl border bg-card p-3">
-                <span
-                  className="mt-1 h-2.5 w-2.5 shrink-0 rounded-full ring-1 ring-black/10"
-                  style={{ backgroundColor: selected.color || '#94a3b8' }}
-                />
-                <div className="min-w-0 flex-1">
-                  <div className="flex items-center gap-2">
-                    <span className="truncate text-sm font-medium">{ev.summary || '(no title)'}</span>
-                    {ev.rrule && (
-                      <span
-                        title={ev.rrule}
-                        className="flex items-center gap-1 rounded-full bg-muted px-2 py-0.5 text-[10px] text-muted-foreground"
-                      >
-                        <Repeat className="h-3 w-3" />
-                        repeats
-                      </span>
-                    )}
-                  </div>
-                  <div className="mt-0.5 text-xs tabular-nums text-muted-foreground">{formatTime(ev)}</div>
+            <section key={day.key} className="flex flex-col gap-2">
+              <h2 className="text-xs font-semibold uppercase tracking-wide text-muted-foreground">
+                {formatDay(day.key)}
+              </h2>
+              {day.events.map((ev) => (
+                <article key={ev.uid} className="flex gap-3 rounded-xl border bg-card p-3">
+                  <span
+                    className="mt-1 h-2.5 w-2.5 shrink-0 rounded-full ring-1 ring-black/10"
+                    style={{ backgroundColor: selected.color || '#94a3b8' }}
+                  />
+                  <div className="min-w-0 flex-1">
+                    <div className="flex items-center gap-2">
+                      <span className="truncate text-sm font-medium">{ev.summary || '(no title)'}</span>
+                      {ev.rrule && (
+                        <span
+                          title={ev.rrule}
+                          className="flex items-center gap-1 rounded-full bg-muted px-2 py-0.5 text-[10px] text-muted-foreground"
+                        >
+                          <Repeat className="h-3 w-3" />
+                          repeats
+                        </span>
+                      )}
+                    </div>
+                    <div className="mt-0.5 text-xs tabular-nums text-muted-foreground">{formatTime(ev)}</div>
 
-                  {/* The editor is the title and the place, and nothing else. Those are the two fields a
+                    {/* The editor is the title and the place, and nothing else. Those are the two fields a
                       person actually corrects; times and recurrence are where an editor does damage, and
                       a half-editor that silently rewrites an RRULE is worse than none. */}
-                  {editing === ev.href && (
-                    <form
-                      className="mt-2 flex flex-col gap-2"
-                      onSubmit={(e) => {
-                        e.preventDefault();
-                        if (!ev.href) return;
-                        // `null` removes the line; an empty string would leave an empty LOCATION behind.
-                        void edit
-                          .save(ev.href, { summary: draft.summary, location: draft.location || null })
-                          .then((ok) => ok && setEditing(null));
-                      }}
-                    >
-                      <input
-                        autoFocus
-                        value={draft.summary}
-                        onChange={(e) => setDraft((d) => ({ ...d, summary: e.target.value }))}
-                        placeholder="Title"
-                        className="rounded-md border bg-background px-2 py-1 text-sm"
-                      />
-                      <input
-                        value={draft.location}
-                        onChange={(e) => setDraft((d) => ({ ...d, location: e.target.value }))}
-                        placeholder="Where"
-                        className="rounded-md border bg-background px-2 py-1 text-xs"
-                      />
-                      <div className="flex items-center gap-2">
-                        <button
-                          type="submit"
-                          disabled={edit.busy === ev.href}
-                          className="flex items-center gap-1 rounded-md bg-primary/10 px-2 py-1 text-xs text-primary disabled:opacity-50"
-                        >
-                          <Check className="h-3 w-3" /> {edit.busy === ev.href ? 'Saving…' : 'Save'}
-                        </button>
-                        <button
-                          type="button"
-                          onClick={() => setEditing(null)}
-                          className="rounded-md px-2 py-1 text-xs text-muted-foreground"
-                        >
-                          Cancel
-                        </button>
+                    {editing === ev.href && (
+                      <form
+                        className="mt-2 flex flex-col gap-2"
+                        onSubmit={(e) => {
+                          e.preventDefault();
+                          if (!ev.href) return;
+                          // `null` removes the line; an empty string would leave an empty LOCATION behind.
+                          void edit
+                            .save(ev.href, { summary: draft.summary, location: draft.location || null })
+                            .then((ok) => ok && setEditing(null));
+                        }}
+                      >
+                        <input
+                          autoFocus
+                          value={draft.summary}
+                          onChange={(e) => setDraft((d) => ({ ...d, summary: e.target.value }))}
+                          placeholder="Title"
+                          className="rounded-md border bg-background px-2 py-1 text-sm"
+                        />
+                        <input
+                          value={draft.location}
+                          onChange={(e) => setDraft((d) => ({ ...d, location: e.target.value }))}
+                          placeholder="Where"
+                          className="rounded-md border bg-background px-2 py-1 text-xs"
+                        />
+                        <div className="flex items-center gap-2">
+                          <button
+                            type="submit"
+                            disabled={edit.busy === ev.href}
+                            className="flex items-center gap-1 rounded-md bg-primary/10 px-2 py-1 text-xs text-primary disabled:opacity-50"
+                          >
+                            <Check className="h-3 w-3" /> {edit.busy === ev.href ? 'Saving…' : 'Save'}
+                          </button>
+                          <button
+                            type="button"
+                            onClick={() => setEditing(null)}
+                            className="rounded-md px-2 py-1 text-xs text-muted-foreground"
+                          >
+                            Cancel
+                          </button>
+                        </div>
+                      </form>
+                    )}
+                    {ev.location && (
+                      <div className="mt-1 flex items-center gap-1 text-xs text-muted-foreground">
+                        <MapPin className="h-3 w-3 shrink-0" />
+                        <span className="truncate">{ev.location}</span>
                       </div>
-                    </form>
-                  )}
-                  {ev.location && (
-                    <div className="mt-1 flex items-center gap-1 text-xs text-muted-foreground">
-                      <MapPin className="h-3 w-3 shrink-0" />
-                      <span className="truncate">{ev.location}</span>
-                    </div>
-                  )}
-                  {ev.description && (
-                    <p className="mt-1 whitespace-pre-wrap text-xs text-muted-foreground">{ev.description}</p>
-                  )}
-                </div>
-                {/* Only for an event we can actually address. An item with no href came from somewhere
-                    that did not give us one, and offering a delete that cannot work is worse than not
-                    offering it. */}
-                {ev.href && editing !== ev.href && (
-                  <div className="flex shrink-0 items-start gap-1">
-                    {confirming === ev.href ? (
-                      <>
-                        <button
-                          onClick={() => void edit.remove(ev.href!).then(() => setConfirming(null))}
-                          disabled={edit.busy === ev.href}
-                          title="Delete this event"
-                          className="rounded p-1 text-destructive hover:bg-destructive/10 disabled:opacity-50"
-                        >
-                          <Check className="h-3.5 w-3.5" />
-                        </button>
-                        <button onClick={() => setConfirming(null)} className="rounded p-1 opacity-50 hover:opacity-100">
-                          <X className="h-3.5 w-3.5" />
-                        </button>
-                      </>
-                    ) : (
-                      <>
-                        <button
-                          onClick={() => {
-                            setDraft({ summary: ev.summary ?? '', location: ev.location ?? '' });
-                            setEditing(ev.href!);
-                          }}
-                          title="Edit"
-                          className="rounded p-1 text-muted-foreground hover:text-foreground"
-                        >
-                          <Pencil className="h-3.5 w-3.5" />
-                        </button>
-                        <button
-                          onClick={() => setConfirming(ev.href!)}
-                          title="Delete"
-                          className="rounded p-1 text-muted-foreground hover:text-destructive"
-                        >
-                          <Trash2 className="h-3.5 w-3.5" />
-                        </button>
-                      </>
+                    )}
+                    {ev.description && (
+                      <p className="mt-1 whitespace-pre-wrap text-xs text-muted-foreground">{ev.description}</p>
                     )}
                   </div>
-                )}
-              </article>
-            ))}
-          </section>
+                  {/* Only for an event we can actually address. An item with no href came from somewhere
+                    that did not give us one, and offering a delete that cannot work is worse than not
+                    offering it. */}
+                  {ev.href && editing !== ev.href && (
+                    <div className="flex shrink-0 items-start gap-1">
+                      {confirming === ev.href ? (
+                        <>
+                          <button
+                            onClick={() => void edit.remove(ev.href!).then(() => setConfirming(null))}
+                            disabled={edit.busy === ev.href}
+                            title="Delete this event"
+                            className="rounded p-1 text-destructive hover:bg-destructive/10 disabled:opacity-50"
+                          >
+                            <Check className="h-3.5 w-3.5" />
+                          </button>
+                          <button
+                            onClick={() => setConfirming(null)}
+                            className="rounded p-1 opacity-50 hover:opacity-100"
+                          >
+                            <X className="h-3.5 w-3.5" />
+                          </button>
+                        </>
+                      ) : (
+                        <>
+                          <button
+                            onClick={() => {
+                              setDraft({ summary: ev.summary ?? '', location: ev.location ?? '' });
+                              setEditing(ev.href!);
+                            }}
+                            title="Edit"
+                            className="rounded p-1 text-muted-foreground hover:text-foreground"
+                          >
+                            <Pencil className="h-3.5 w-3.5" />
+                          </button>
+                          <button
+                            onClick={() => setConfirming(ev.href!)}
+                            title="Delete"
+                            className="rounded p-1 text-muted-foreground hover:text-destructive"
+                          >
+                            <Trash2 className="h-3.5 w-3.5" />
+                          </button>
+                        </>
+                      )}
+                    </div>
+                  )}
+                </article>
+              ))}
+            </section>
           ))}
         </div>
       </div>

web/dav/ContactsView.tsx

@@ -2,6 +2,7 @@ import { useState } from 'react';
 import { Building2, Mail, Phone, User, Pencil, Trash2, Check, X, Plus } from 'lucide-react';
 import { useDavContacts, useSelectedCollection } from './useDavData';
 import { useDavEdit, CREATING } from './useDavEdit';
+import { useFilter, matches } from './useFilter';
 import { useTranslation } from 'officerdev';
 
 // Right panel of /contacts: the selected address book as cards, sorted by name.
@@ -31,21 +32,27 @@ export const ContactsView = () => {
   const [draft, setDraft] = useState({ fullName: '', email: '', phone: '' });
   const [confirming, setConfirming] = useState<string | null>(null);
   const [draftNew, setDraftNew] = useState<ReturnType<typeof blankDraft> | null>(null);
+  const filter = useFilter('Filter contacts');
 
   if (loadingCollections) return <Placeholder text="Loading address books…" />;
   if (!selected) return <Placeholder text="No address books yet. Create one from a CardDAV client." />;
 
+  // Everything a person might half-remember about someone: the name, either address, the company.
+  const shown = contacts.filter((c) => matches(filter.query, c.fullName, c.org, c.title, ...c.emails, ...c.phones));
+
   // Not an early return: the header carries the only way to ADD a card, and an empty address book is
-  // exactly when somebody wants it.
+  // exactly when somebody wants it. A filter that matches nothing says SO — otherwise it reads as an
+  // address book that lost its contacts.
   const notice = error
     ? t('dav.readFailed', { name: selected.displayName, reason: String(error) })
     : isLoading
       ? 'Loading contacts…'
       : contacts.length === 0
         ? `${selected.displayName} has no contacts.`
-        : null;
-
-  const sorted = [...contacts].sort((a, b) => a.fullName.localeCompare(b.fullName));
+        : shown.length === 0
+          ? `No contact matches “${filter.query}”.`
+          : null;
+  const sorted = [...shown].sort((a, b) => a.fullName.localeCompare(b.fullName));
 
   const submitNew = (e: React.FormEvent) => {
     e.preventDefault();
@@ -65,9 +72,11 @@ export const ContactsView = () => {
         <div className="min-w-0">
           <div className="truncate text-sm font-semibold leading-tight">{selected.displayName}</div>
           <div className="text-xs text-muted-foreground">
-            {contacts.length} {contacts.length === 1 ? 'contact' : 'contacts'}
+            {filter.query ? `${shown.length} of ${contacts.length}` : contacts.length}{' '}
+            {contacts.length === 1 ? 'contact' : 'contacts'}
           </div>
         </div>
+        {filter.input}
         <button
           onClick={() => setDraftNew((d) => (d ? null : blankDraft()))}
           className="flex shrink-0 items-center gap-1.5 rounded-lg bg-primary/10 px-3 py-1.5 text-xs font-medium text-primary transition-colors hover:bg-primary/20"
@@ -128,141 +137,141 @@ export const ContactsView = () => {
         {notice && <Placeholder text={notice} />}
         <div className="mx-auto grid max-w-4xl grid-cols-1 gap-3 p-6 sm:grid-cols-2">
           {sorted.map((contact) => (
-          <article key={contact.uid} className="flex gap-3 rounded-xl border bg-card p-3">
-            <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-sky-500/15 text-sm font-semibold text-sky-600">
-              {initials(contact.fullName)}
-            </div>
-            <div className="min-w-0 flex-1">
-              <div className="truncate text-sm font-medium">{contact.fullName || '(no name)'}</div>
-              {(contact.title || contact.org) && (
-                <div className="mt-0.5 flex items-center gap-1 text-xs text-muted-foreground">
-                  <Building2 className="h-3 w-3 shrink-0" />
-                  <span className="truncate">{[contact.title, contact.org].filter(Boolean).join(' · ')}</span>
-                </div>
-              )}
-              {contact.emails.map((email) => (
-                <a
-                  key={email}
-                  href={`mailto:${email}`}
-                  className="mt-1 flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground"
-                >
-                  <Mail className="h-3 w-3 shrink-0" />
-                  <span className="truncate">{email}</span>
-                </a>
-              ))}
-              {contact.phones.map((phone) => (
-                <a
-                  key={phone}
-                  href={`tel:${phone}`}
-                  className="mt-1 flex items-center gap-1 text-xs tabular-nums text-muted-foreground hover:text-foreground"
-                >
-                  <Phone className="h-3 w-3 shrink-0" />
-                  <span className="truncate">{phone}</span>
-                </a>
-              ))}
+            <article key={contact.uid} className="flex gap-3 rounded-xl border bg-card p-3">
+              <div className="flex h-10 w-10 shrink-0 items-center justify-center rounded-full bg-sky-500/15 text-sm font-semibold text-sky-600">
+                {initials(contact.fullName)}
+              </div>
+              <div className="min-w-0 flex-1">
+                <div className="truncate text-sm font-medium">{contact.fullName || '(no name)'}</div>
+                {(contact.title || contact.org) && (
+                  <div className="mt-0.5 flex items-center gap-1 text-xs text-muted-foreground">
+                    <Building2 className="h-3 w-3 shrink-0" />
+                    <span className="truncate">{[contact.title, contact.org].filter(Boolean).join(' · ')}</span>
+                  </div>
+                )}
+                {contact.emails.map((email) => (
+                  <a
+                    key={email}
+                    href={`mailto:${email}`}
+                    className="mt-1 flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground"
+                  >
+                    <Mail className="h-3 w-3 shrink-0" />
+                    <span className="truncate">{email}</span>
+                  </a>
+                ))}
+                {contact.phones.map((phone) => (
+                  <a
+                    key={phone}
+                    href={`tel:${phone}`}
+                    className="mt-1 flex items-center gap-1 text-xs tabular-nums text-muted-foreground hover:text-foreground"
+                  >
+                    <Phone className="h-3 w-3 shrink-0" />
+                    <span className="truncate">{phone}</span>
+                  </a>
+                ))}
 
-              {/* Name, one email, one phone — the three fields worth correcting from a list. A card can
+                {/* Name, one email, one phone — the three fields worth correcting from a list. A card can
                   hold several of each; editing rewrites the FIRST and leaves the rest untouched, which
                   is why `setProperty` replaces a line rather than rebuilding the card. */}
-              {editing === contact.href && (
-                <form
-                  className="mt-2 flex flex-col gap-2"
-                  onSubmit={(e) => {
-                    e.preventDefault();
-                    if (!contact.href) return;
-                    /* The form shows the FIRST email and phone; a card can hold several. Sending just
+                {editing === contact.href && (
+                  <form
+                    className="mt-2 flex flex-col gap-2"
+                    onSubmit={(e) => {
+                      e.preventDefault();
+                      if (!contact.href) return;
+                      /* The form shows the FIRST email and phone; a card can hold several. Sending just
                        the one would delete the rest, so the others are carried through untouched. */
-                    void edit
-                      .save(contact.href, {
-                        fullName: draft.fullName,
-                        emails: [draft.email, ...contact.emails.slice(1)].filter(Boolean),
-                        phones: [draft.phone, ...contact.phones.slice(1)].filter(Boolean),
-                      })
-                      .then((ok) => ok && setEditing(null));
-                  }}
-                >
-                  <input
-                    autoFocus
-                    value={draft.fullName}
-                    onChange={(e) => setDraft((d) => ({ ...d, fullName: e.target.value }))}
-                    placeholder="Name"
-                    className="rounded-md border bg-background px-2 py-1 text-sm"
-                  />
-                  <input
-                    value={draft.email}
-                    onChange={(e) => setDraft((d) => ({ ...d, email: e.target.value }))}
-                    placeholder="Email"
-                    className="rounded-md border bg-background px-2 py-1 text-xs"
-                  />
-                  <input
-                    value={draft.phone}
-                    onChange={(e) => setDraft((d) => ({ ...d, phone: e.target.value }))}
-                    placeholder="Phone"
-                    className="rounded-md border bg-background px-2 py-1 text-xs tabular-nums"
-                  />
-                  <div className="flex items-center gap-2">
-                    <button
-                      type="submit"
-                      disabled={edit.busy === contact.href}
-                      className="flex items-center gap-1 rounded-md bg-primary/10 px-2 py-1 text-xs text-primary disabled:opacity-50"
-                    >
-                      <Check className="h-3 w-3" /> {edit.busy === contact.href ? 'Saving…' : 'Save'}
-                    </button>
-                    <button
-                      type="button"
-                      onClick={() => setEditing(null)}
-                      className="rounded-md px-2 py-1 text-xs text-muted-foreground"
-                    >
-                      Cancel
-                    </button>
-                  </div>
-                </form>
-              )}
-            </div>
-
-            {contact.href && editing !== contact.href && (
-              <div className="flex shrink-0 items-start gap-1">
-                {confirming === contact.href ? (
-                  <>
-                    <button
-                      onClick={() => void edit.remove(contact.href!).then(() => setConfirming(null))}
-                      disabled={edit.busy === contact.href}
-                      title="Delete this contact"
-                      className="rounded p-1 text-destructive hover:bg-destructive/10 disabled:opacity-50"
-                    >
-                      <Check className="h-3.5 w-3.5" />
-                    </button>
-                    <button onClick={() => setConfirming(null)} className="rounded p-1 opacity-50 hover:opacity-100">
-                      <X className="h-3.5 w-3.5" />
-                    </button>
-                  </>
-                ) : (
-                  <>
-                    <button
-                      onClick={() => {
-                        setDraft({
-                          fullName: contact.fullName ?? '',
-                          email: contact.emails[0] ?? '',
-                          phone: contact.phones[0] ?? '',
-                        });
-                        setEditing(contact.href!);
-                      }}
-                      title="Edit"
-                      className="rounded p-1 text-muted-foreground hover:text-foreground"
-                    >
-                      <Pencil className="h-3.5 w-3.5" />
-                    </button>
-                    <button
-                      onClick={() => setConfirming(contact.href!)}
-                      title="Delete"
-                      className="rounded p-1 text-muted-foreground hover:text-destructive"
-                    >
-                      <Trash2 className="h-3.5 w-3.5" />
-                    </button>
-                  </>
+                      void edit
+                        .save(contact.href, {
+                          fullName: draft.fullName,
+                          emails: [draft.email, ...contact.emails.slice(1)].filter(Boolean),
+                          phones: [draft.phone, ...contact.phones.slice(1)].filter(Boolean),
+                        })
+                        .then((ok) => ok && setEditing(null));
+                    }}
+                  >
+                    <input
+                      autoFocus
+                      value={draft.fullName}
+                      onChange={(e) => setDraft((d) => ({ ...d, fullName: e.target.value }))}
+                      placeholder="Name"
+                      className="rounded-md border bg-background px-2 py-1 text-sm"
+                    />
+                    <input
+                      value={draft.email}
+                      onChange={(e) => setDraft((d) => ({ ...d, email: e.target.value }))}
+                      placeholder="Email"
+                      className="rounded-md border bg-background px-2 py-1 text-xs"
+                    />
+                    <input
+                      value={draft.phone}
+                      onChange={(e) => setDraft((d) => ({ ...d, phone: e.target.value }))}
+                      placeholder="Phone"
+                      className="rounded-md border bg-background px-2 py-1 text-xs tabular-nums"
+                    />
+                    <div className="flex items-center gap-2">
+                      <button
+                        type="submit"
+                        disabled={edit.busy === contact.href}
+                        className="flex items-center gap-1 rounded-md bg-primary/10 px-2 py-1 text-xs text-primary disabled:opacity-50"
+                      >
+                        <Check className="h-3 w-3" /> {edit.busy === contact.href ? 'Saving…' : 'Save'}
+                      </button>
+                      <button
+                        type="button"
+                        onClick={() => setEditing(null)}
+                        className="rounded-md px-2 py-1 text-xs text-muted-foreground"
+                      >
+                        Cancel
+                      </button>
+                    </div>
+                  </form>
                 )}
               </div>
-            )}
+
+              {contact.href && editing !== contact.href && (
+                <div className="flex shrink-0 items-start gap-1">
+                  {confirming === contact.href ? (
+                    <>
+                      <button
+                        onClick={() => void edit.remove(contact.href!).then(() => setConfirming(null))}
+                        disabled={edit.busy === contact.href}
+                        title="Delete this contact"
+                        className="rounded p-1 text-destructive hover:bg-destructive/10 disabled:opacity-50"
+                      >
+                        <Check className="h-3.5 w-3.5" />
+                      </button>
+                      <button onClick={() => setConfirming(null)} className="rounded p-1 opacity-50 hover:opacity-100">
+                        <X className="h-3.5 w-3.5" />
+                      </button>
+                    </>
+                  ) : (
+                    <>
+                      <button
+                        onClick={() => {
+                          setDraft({
+                            fullName: contact.fullName ?? '',
+                            email: contact.emails[0] ?? '',
+                            phone: contact.phones[0] ?? '',
+                          });
+                          setEditing(contact.href!);
+                        }}
+                        title="Edit"
+                        className="rounded p-1 text-muted-foreground hover:text-foreground"
+                      >
+                        <Pencil className="h-3.5 w-3.5" />
+                      </button>
+                      <button
+                        onClick={() => setConfirming(contact.href!)}
+                        title="Delete"
+                        className="rounded p-1 text-muted-foreground hover:text-destructive"
+                      >
+                        <Trash2 className="h-3.5 w-3.5" />
+                      </button>
+                    </>
+                  )}
+                </div>
+              )}
             </article>
           ))}
         </div>

web/dav/useFilter.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, test } from 'bun:test';
+import { matches } from './useFilter';
+
+// The accent rule is the one that matters on this machine: an address book of Portuguese names is
+// unsearchable if "jose" does not find "José".
+
+describe('matches', () => {
+  test('an empty query keeps everything', () => {
+    expect(matches('', 'anything')).toBe(true);
+    expect(matches('   ', 'anything')).toBe(true);
+  });
+
+  test('is case insensitive', () => {
+    expect(matches('RAMIRO', 'Cervejaria Ramiro')).toBe(true);
+  });
+
+  test('ignores accents in BOTH directions', () => {
+    expect(matches('jose', 'José Conceição')).toBe(true);
+    expect(matches('josé', 'Jose Conceicao')).toBe(true);
+    expect(matches('conceicao', 'José Conceição')).toBe(true);
+  });
+
+  test('every term must match, but they may land in different fields', () => {
+    expect(matches('ana lisboa', 'Ana Silva', 'Lisboa')).toBe(true);
+    expect(matches('ana porto', 'Ana Silva', 'Lisboa')).toBe(false);
+  });
+
+  test('skips absent fields rather than matching on "undefined"', () => {
+    expect(matches('undefined', 'Ana Silva', undefined)).toBe(false);
+  });
+
+  test('a date is searchable because start is an ISO string', () => {
+    expect(matches('2026-08-29', 'Dinner', undefined, undefined, '2026-08-29T19:00:00Z')).toBe(true);
+  });
+});

web/dav/useFilter.tsx

@@ -0,0 +1,53 @@
+import { useState } from 'react';
+import { Search, X } from 'lucide-react';
+
+/**
+ * A filter box for a list that is already in the browser.
+ *
+ * Client-side, deliberately. Both screens load a whole collection in one request and hold it — a
+ * calendar of a few hundred events, an address book of a few hundred cards — so filtering is a string
+ * comparison over data already in hand. A server round trip per keystroke would be slower, would need a
+ * search endpoint on the sidecar, and would show a spinner where a person expects a list to narrow.
+ *
+ * Matching is CASE- AND ACCENT-INSENSITIVE, and that second half is not decoration here: this owner's
+ * contacts are Portuguese. Typing "jose" must find "José" or the box is useless for half the address
+ * book. `NFD` splits a letter from its accent and the range strips what is left behind.
+ *
+ * Every term must match SOMEWHERE, not all in one field — so "ana lisboa" finds the Ana whose address is
+ * in Lisbon, which is how people actually search a contact list.
+ */
+const fold = (value: string) => value.normalize('NFD').replace(/[̀-ͯ]/g, '').toLowerCase();
+
+export const matches = (query: string, ...fields: (string | undefined)[]): boolean => {
+  const terms = fold(query).split(/\s+/).filter(Boolean);
+  if (!terms.length) return true;
+  const haystack = fold(fields.filter(Boolean).join(' '));
+  return terms.every((term) => haystack.includes(term));
+};
+
+export function useFilter(placeholder: string) {
+  const [query, setQuery] = useState('');
+
+  const input = (
+    <div className="relative min-w-0 flex-1 sm:max-w-64">
+      <Search className="pointer-events-none absolute left-2 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-muted-foreground" />
+      <input
+        value={query}
+        onChange={(e) => setQuery(e.target.value)}
+        placeholder={placeholder}
+        className="w-full rounded-md border bg-background py-1 pl-7 pr-7 text-xs"
+      />
+      {query && (
+        <button
+          onClick={() => setQuery('')}
+          title="Clear"
+          className="absolute right-1.5 top-1/2 -translate-y-1/2 rounded p-0.5 text-muted-foreground hover:text-foreground"
+        >
+          <X className="h-3 w-3" />
+        </button>
+      )}
+    </div>
+  );
+
+  return { query, input };
+}