swarm-ui: add CheckboxField and use it for the issue report toggle and the account delete option

docs/web-ui/design-guide.md

@@ -150,9 +150,11 @@ that needs it, not after a contributor styles it inline and leaves it
 for later — a page reaching for a component that's already there has ready-made
 blocks to build with, instead of the next contributor duplicating
 ad-hoc styling that someone then has to hunt down and consolidate.
-`Panel`/`Badge`/`Table`/`TextField`/`SelectField`/`Button` are the
-primitives that exist; `/components` always has the current, complete
-list — this doc won't try to keep a duplicate inventory in sync.
+`Panel`/`Badge`/`Table`/`TextField`/`SelectField`/`CheckboxField`/`Button`
+are the primitives that exist; `/components` always has the current, complete
+list — this doc won't try to keep a duplicate inventory in sync. A yes/no
+option in a form uses `CheckboxField`, which sizes its row like the other
+fields, rather than a bare `<input type="checkbox">`.
 
 **Every new `ui/` component gets a demo section on `/components` the
 same day it lands** — no primitive without a place to see it. One

frontend/packages/swarm-ui/src/agent/detail/LinkedAccounts.tsx

@@ -13,6 +13,7 @@ import { useEffect, useState } from "preact/hooks";
 import { ApiErrorPanel } from "@hive/shared/api-error-panel.js";
 import { readApiError, type ProblemDetails } from "@hive/shared/api-error.js";
 import { Badge } from "@hive/shared/badge.js";
+import { CheckboxField } from "../../ui/checkbox-field/CheckboxField.js";
 import { ConfirmDialog } from "../../ui/confirm-dialog/ConfirmDialog.js";
 import { accountKindLabel } from "./account-kind.js";
 import "./LinkedAccounts.css";
@@ -136,17 +137,12 @@ export function LinkedAccounts({
             removed from the swarm secret store. The agent is not told.
           </p>
           {deleteTarget.kind === "matrix" ? (
-            <label>
-              <input
-                type="checkbox"
-                checked={revoke}
-                onChange={(e) =>
-                  setRevoke((e.target as HTMLInputElement).checked)
-                }
-              />{" "}
-              also log the token out at the homeserver; if that fails, the
-              account is kept
-            </label>
+            <CheckboxField
+              id="linked-accounts-revoke"
+              label="also log the token out at the homeserver; if that fails, the account is kept"
+              checked={revoke}
+              onChange={setRevoke}
+            />
           ) : null}
           {deleteError ? (
             <ApiErrorPanel context="delete failed" problem={deleteError} />

frontend/packages/swarm-ui/src/pages/ComponentsPage.tsx

@@ -27,6 +27,7 @@ import {
   SelectField,
   type SelectOption,
 } from "../ui/select-field/SelectField.js";
+import { CheckboxField } from "../ui/checkbox-field/CheckboxField.js";
 import { Button, type ButtonVariant } from "../ui/button/Button.js";
 import { Dialog } from "../ui/dialog/Dialog.js";
 import { ConfirmDialog } from "../ui/confirm-dialog/ConfirmDialog.js";
@@ -156,6 +157,18 @@ function SelectFieldSample() {
   );
 }
 
+function CheckboxFieldSample() {
+  const [checked, setChecked] = useState(true);
+  return (
+    <CheckboxField
+      id="sample-checkbox-field"
+      label="hide blocked (open dependency)"
+      checked={checked}
+      onChange={setChecked}
+    />
+  );
+}
+
 function RefreshIntervalPickerSample() {
   const [value, setValue] = useState<RefreshIntervalMs>(30_000);
   return (
@@ -517,6 +530,21 @@ export function ComponentsPage() {
         </Sample>
       </Section>
 
+      <Section title="CheckboxField">
+        <Sample label="editable">
+          <CheckboxFieldSample />
+        </Sample>
+        <Sample label="disabled">
+          <CheckboxField
+            id="sample-checkbox-field-disabled"
+            label="also log the token out"
+            checked={false}
+            onChange={() => {}}
+            disabled
+          />
+        </Sample>
+      </Section>
+
       <Section title="Button">
         <div class="components-chip-row">
           {BUTTON_VARIANTS.map((variant) => (

frontend/packages/swarm-ui/src/pages/IssueReportPage.css

@@ -15,12 +15,6 @@
   gap: 1.25em;
   margin-bottom: 1em;
 }
-.issue-report-toggle {
-  display: flex;
-  align-items: center;
-  gap: 0.4em;
-  cursor: pointer;
-}
 .issue-report-sort-btn {
   background: none;
   border: none;

frontend/packages/swarm-ui/src/pages/IssueReportPage.tsx

@@ -33,6 +33,7 @@ import { readApiError, type ProblemDetails } from "@hive/shared/api-error.js";
 import { Badge } from "@hive/shared/badge.js";
 import { useLocalSetting } from "@hive/shared/settings-storage.js";
 import { Panel } from "../ui/panel/Panel.js";
+import { CheckboxField } from "../ui/checkbox-field/CheckboxField.js";
 import { SelectField } from "../ui/select-field/SelectField.js";
 import { Table, type TableColumn } from "../ui/table/Table.js";
 import { ALL_REPOS, reportUrl, repoOptions } from "./issue-report-repo.js";
@@ -378,16 +379,12 @@ export function IssueReportPage() {
           onChange={setRepoFilter}
           options={repoOptions(repos, repoFilter)}
         />
-        <label class="issue-report-toggle">
-          <input
-            type="checkbox"
-            checked={hideBlocked}
-            onChange={(e) =>
-              setHideBlocked((e.target as HTMLInputElement).checked)
-            }
-          />
-          hide blocked (open dependency)
-        </label>
+        <CheckboxField
+          id="issue-report-hide-blocked"
+          label="hide blocked (open dependency)"
+          checked={hideBlocked}
+          onChange={setHideBlocked}
+        />
       </div>
       {reposError ? (
         <ApiErrorPanel

frontend/packages/swarm-ui/src/ui/checkbox-field/CheckboxField.css

@@ -0,0 +1,25 @@
+/* <CheckboxField> — box and label on one row. `min-height` is the same
+   touch-target floor `.ui-form-control` sets (FormField.css has the
+   reasoning), so a checkbox beside a text or select field is as tall as it and
+   its label is centred on the same line. The box takes the accent colour from
+   the shared theme instead of the browser's blue. */
+.ui-checkbox-field {
+  display: flex;
+  align-items: center;
+  gap: 0.5em;
+  min-height: 2.75em;
+  cursor: pointer;
+  color: var(--fg);
+}
+.ui-checkbox-field input {
+  accent-color: var(--purple);
+  width: 1.1em;
+  height: 1.1em;
+  margin: 0;
+  flex: none;
+  cursor: inherit;
+}
+.ui-checkbox-field:has(input:disabled) {
+  color: var(--muted);
+  cursor: not-allowed;
+}

frontend/packages/swarm-ui/src/ui/checkbox-field/CheckboxField.tsx

@@ -0,0 +1,33 @@
+// <CheckboxField> — a labelled checkbox, the on/off sibling of `TextField` and
+// `SelectField`. The label sits beside the box, not above it, and the whole
+// row is one click target at the kit's touch-target height, so a checkbox next
+// to a `SelectField` lines up with it and a bare browser checkbox no longer
+// sets the row's size.
+import "./CheckboxField.css";
+
+export function CheckboxField({
+  id,
+  label,
+  checked,
+  onChange,
+  disabled,
+}: {
+  id: string;
+  label: string;
+  checked: boolean;
+  onChange: (checked: boolean) => void;
+  disabled?: boolean;
+}) {
+  return (
+    <label class="ui-checkbox-field" for={id}>
+      <input
+        id={id}
+        type="checkbox"
+        checked={checked}
+        disabled={disabled}
+        onChange={(e) => onChange((e.target as HTMLInputElement).checked)}
+      />
+      <span>{label}</span>
+    </label>
+  );
+}