Group six more clusters out of web/src/lib

Takes the flat module count from 66 to 42, continuing what admin/ and
calendar/ started.

  lib/mailbox/  archiveDate, emptyFolder, folderMove, labelTree,
                mailboxName, mailboxRoute
  lib/sieve/    sieve, sieveApply, sieveFolders
  lib/input/    keyboard, swipe, touch, listSelection, dropUpload
  lib/notify/   notify, webpush, webpushEnable
  lib/sw/       swCache, swFacts, staleBuild
  lib/text/     html, markdown, text, emlName

FOUR THINGS THE FILENAMES GET WRONG, each checked by reading the file
rather than trusting what it is called:

  - appFolder is not a mailbox. It is the `ihasmail` folder in JMAP
    *Files*, where the client keeps signature images and synced settings.
    It stays flat.
  - format holds no formatting of text. It re-exports the date and clock
    formatters, so it belongs with dates/datetime, not with text/.
  - preview is the file viewer deciding what it can show without
    downloading, and source is where to point someone asking for this
    instance's AGPL source. Neither is about text.
  - notify is not Web Push. It is the tab title, the favicon badge and
    the new-mail sound -- in-app notification, which is why it sits with
    webpush rather than under sw/ with the service worker's own concerns.

threadScroll stays flat too: it decides where a conversation opens, which
is view state rather than a gesture, and input/ is honest only if
everything in it interprets something the reader did.

No behavior change. Almost every reference was on the @/ alias; eight
relative imports in files that did not move, or that moved away from a
sibling, needed rewriting by hand.

web/src/views/settings/AppearanceSettings.tsx

@@ -1,7 +1,7 @@
 import { useSettings } from "@/store/settings";
 import { PALETTES, effectiveMode, type Mode, type PaletteId } from "@/lib/palette";
 import { Switch, useIsTouch } from "@/ui/misc";
-import { SWIPE_CHOICES, type SwipeAction } from "@/lib/swipe";
+import { SWIPE_CHOICES, type SwipeAction } from "@/lib/input/swipe";
 import { TRANSLATION_ISSUE_URL, UI_LANGUAGES } from "@/lib/languages";
 import { t as translate, tNode } from "@/lib/i18n";
 import { isEnforced } from "@/lib/settingsPolicy";

web/src/views/settings/FiltersSettings.tsx

@@ -2,7 +2,7 @@ import { useEffect, useRef, useState } from "react";
 import { ArrowDown, ArrowUp, Code, GripVertical, Plus, Trash2, Wand2, Play, AlertTriangle, Power } from "lucide-react";
 import { useSieve } from "@/store/sieve";
 import { useMail } from "@/store/mail";
-import { describeRule, newRule, reorderRules, rulesToSieve, upsertRule, type SieveRule } from "@/lib/sieve";
+import { describeRule, newRule, reorderRules, rulesToSieve, upsertRule, type SieveRule } from "@/lib/sieve/sieve";
 import { RuleDialog } from "./RuleDialog";
 import { saveAndApply } from "../mail/FilterFromMessage";
 import { confirmDialog, promptDialog } from "@/ui/dialog";

web/src/views/settings/FoldersSettings.tsx

@@ -7,7 +7,7 @@ import { formatSize } from "@/lib/format";
 import { ShareDialog } from "./ShareDialog";
 import type { Mailbox, MailboxRole } from "@/jmap/types";
 import { plural, t } from "@/lib/i18n";
-import { mailboxDisplayPath } from "@/lib/mailboxName";
+import { mailboxDisplayPath } from "@/lib/mailbox/mailboxName";
 
 /*
  * Roles a folder can be given here.

web/src/views/settings/IdentitiesSettings.tsx

@@ -8,8 +8,8 @@ import { Dialog, confirmDialog } from "@/ui/dialog";
 import { RichEditor, type RichEditorHandle } from "../compose/RichEditor";
 import { toast } from "@/ui/toast";
 import { parseAddressList, formatAddressList } from "@/lib/address";
-import { htmlToText } from "@/lib/text";
-import { sanitizeEditorHtml } from "@/lib/html";
+import { htmlToText } from "@/lib/text/text";
+import { sanitizeEditorHtml } from "@/lib/text/html";
 import { externalizeDataImages, storeSignatureHtml, uploadSignatureImage } from "@/lib/signatureImages";
 import { buildMarkerSignature, byteLength, compactHtml, signatureTooLong, SIGNATURE_LIMIT } from "@/lib/signatureHtml";
 import { t } from "@/lib/i18n";

web/src/views/settings/LabelsSettings.tsx

@@ -1,7 +1,7 @@
 import { useState } from "react";
 import { Plus, Trash2 } from "lucide-react";
 import { useSettings, type LabelVisibility } from "@/store/settings";
-import { labelTree, descendantKeywords } from "@/lib/labelTree";
+import { labelTree, descendantKeywords } from "@/lib/mailbox/labelTree";
 import { useMemo } from "react";
 import { CALENDAR_COLORS, ColorSwatches } from "@/ui/misc";
 import { promptDialog } from "@/ui/dialog";

web/src/views/settings/NotificationsSettings.tsx

@@ -1,10 +1,10 @@
 import { useEffect, useState } from "react";
 import { useSettings } from "@/store/settings";
 import { Switch } from "@/ui/misc";
-import { requestNotificationPermission, showNotification, playNewMailSound } from "@/lib/notify";
+import { requestNotificationPermission, showNotification, playNewMailSound } from "@/lib/notify/notify";
 import { useSession } from "@/store/session";
-import { disableWebPush, enableWebPush, webPushActive } from "@/lib/webpushEnable";
-import { supportsEmailPush, webPushAvailable } from "@/lib/webpush";
+import { disableWebPush, enableWebPush, webPushActive } from "@/lib/notify/webpushEnable";
+import { supportsEmailPush, webPushAvailable } from "@/lib/notify/webpush";
 import { toast } from "@/ui/toast";
 import { t } from "@/lib/i18n";
 import { isEnforced } from "@/lib/settingsPolicy";

web/src/views/settings/RuleDialog.tsx

@@ -1,7 +1,7 @@
 import { useMemo, useState } from "react";
 import { Plus, Trash2 } from "lucide-react";
 import { useMail } from "@/store/mail";
-import { HEADER_CHOICES, HEADER_OPS, type SieveAction, type SieveRule, type SieveTest } from "@/lib/sieve";
+import { HEADER_CHOICES, HEADER_OPS, type SieveAction, type SieveRule, type SieveTest } from "@/lib/sieve/sieve";
 import { Dialog, promptDialog } from "@/ui/dialog";
 import { toast } from "@/ui/toast";
 import type { Id } from "@/jmap/types";

web/src/views/settings/ShortcutsSettings.tsx

@@ -1,5 +1,5 @@
 import { useMemo } from "react";
-import { keyboard } from "@/lib/keyboard";
+import { keyboard } from "@/lib/input/keyboard";
 import { Kbd } from "@/ui/misc";
 import { t, tNode } from "@/lib/i18n";
 

web/src/views/settings/TemplatesSettings.tsx

@@ -3,7 +3,7 @@ import { Plus, Trash2 } from "lucide-react";
 import { useSettings, type Template } from "@/store/settings";
 import { Dialog } from "@/ui/dialog";
 import { RichEditor } from "../compose/RichEditor";
-import { htmlToText } from "@/lib/text";
+import { htmlToText } from "@/lib/text/text";
 import { t as translate } from "@/lib/i18n";
 import { PLACEHOLDER_NAMES } from "@/lib/templatePlaceholders";
 

web/src/views/settings/__tests__/filters-unsaved-guard.test.tsx

@@ -5,7 +5,7 @@ import { FiltersSettings } from "../FiltersSettings";
 import { ConfirmHost } from "@/ui/dialog";
 import { useSieve } from "@/store/sieve";
 import { hasUnsavedChanges } from "@/lib/unsavedChanges";
-import { newRule, rulesToSieve } from "@/lib/sieve";
+import { newRule, rulesToSieve } from "@/lib/sieve/sieve";
 
 (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true;
 

web/src/views/settings/__tests__/rule-dialog-header.test.tsx

@@ -2,7 +2,7 @@ import { act } from "react";
 import { createRoot, type Root } from "react-dom/client";
 import { afterEach, beforeEach, describe, expect, it } from "vitest";
 import { RuleDialog } from "../RuleDialog";
-import { newRule } from "@/lib/sieve";
+import { newRule } from "@/lib/sieve/sieve";
 
 (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true;
 

web/src/views/settings/__tests__/rule-drag-reorder.test.tsx

@@ -3,7 +3,7 @@ import { createRoot, type Root } from "react-dom/client";
 import { afterEach, beforeEach, describe, expect, it } from "vitest";
 import { FiltersSettings } from "../FiltersSettings";
 import { useSieve } from "@/store/sieve";
-import { newRule, rulesToSieve } from "@/lib/sieve";
+import { newRule, rulesToSieve } from "@/lib/sieve/sieve";
 
 (globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true;