feat: add OPDS search support & next/prev page navigation (#1462)

## Summary

**What is the goal of this PR?**
Adds OPDS search support, allowing users to search a catalog directly
from the book browser when the server exposes an OpenSearch template.

**What changes are included?**
- `OpdsParser`: parses the OpenSearch template URL from feed-level
`<link rel="search">` elements and exposes it via `getSearchTemplate()`
- `OpdsBookBrowserActivity`: fetches and stores the search template
after each feed load; shows a Search hint on the Left button when a
template is available; launches the existing `KeyboardEntryActivity` for
query input; URL-encodes the query and fetches the result feed
- Absolute search result URLs are handled correctly in `fetchFeed`
(skips prepending the server base URL)
- A `consumeConfirm` guard prevents the Confirm release that submits the
keyboard from immediately triggering a book download on the first
browsing frame after search results load

## Additional Context

- Search is silently unavailable if the server does not advertise an
OpenSearch template — no UI change in that case
- Tested against a Calibre-Web OPDS endpoint which exposes `<link
rel="search" type="application/opensearchdescription+xml">`
- The inline URL encoder in `performSearch` was necessary as
`StringUtils` has no such utility; worth considering extracting to
`StringUtils` in a follow-up
- No new dependencies introduced

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**NO**_

---------

Co-authored-by: kira <rammah@tuta.io>
Co-authored-by: Justin Mitchell <justin@jmitch.com>

lib/I18n/translations/belarusian.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Адкрыйце гэты адрас у браўзеры"
 STR_OR_HTTP_PREFIX: "або http://"
 STR_SCAN_QR_HINT: "або адсканіруйце QR-код:"
 STR_CALIBRE_WIRELESS: "Calibre па Wi-Fi"
-STR_CALIBRE_WEB_URL: "Вэб-адрас Calibre"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Абаронена | + = Захавана"
 STR_MAC_ADDRESS: "MAC-адрас:"
 STR_CHECKING_WIFI: "Праверка Wi-Fi..."

lib/I18n/translations/catalan.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Obriu aquest URL al navegador"
 STR_OR_HTTP_PREFIX: "o http://"
 STR_SCAN_QR_HINT: "o escanegeu el codi QR amb el telèfon:"
 STR_CALIBRE_WIRELESS: "Calibre sense fils"
-STR_CALIBRE_WEB_URL: "URL web del Calibre"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Encriptat | + = Desat"
 STR_MAC_ADDRESS: "Adreça MAC:"
 STR_CHECKING_WIFI: "S'està comprovant el WiFi..."

lib/I18n/translations/czech.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Otevřete tuto URL ve svém prohlížeči"
 STR_OR_HTTP_PREFIX: "nebo http://"
 STR_SCAN_QR_HINT: "nebo naskenujte QR kód telefonem:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "URL webu Calibre"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Šifrováno | + = Uloženo"
 STR_MAC_ADDRESS: "MAC adresa:"
 STR_CHECKING_WIFI: "Kontrola WiFi..."

lib/I18n/translations/danish.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Åbn denne URL i din browser"
 STR_OR_HTTP_PREFIX: "eller http://"
 STR_SCAN_QR_HINT: "eller scan QR-kode med din telefon:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "Calibre Web URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Krypteret | + = Gemt"
 STR_MAC_ADDRESS: "MAC-adresse:"
 STR_CHECKING_WIFI: "Tjekker WiFi..."

lib/I18n/translations/dutch.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Open deze URL in je browser"
 STR_OR_HTTP_PREFIX: "of http://"
 STR_SCAN_QR_HINT: "of scan de QR-code met je telefoon:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "Calibre Web URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Beveiligd | + = Opgeslagen"
 STR_MAC_ADDRESS: "MAC-adres:"
 STR_CHECKING_WIFI: "Wifi controleren..."

lib/I18n/translations/english.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Open this URL in your browser"
 STR_OR_HTTP_PREFIX: "or http://"
 STR_SCAN_QR_HINT: "or scan QR code with your phone:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "Calibre Web URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Encrypted | + = Saved"
 STR_MAC_ADDRESS: "MAC address:"
 STR_CHECKING_WIFI: "Checking WiFi..."
@@ -175,6 +175,8 @@ STR_UNNAMED: "Unnamed"
 STR_NO_SERVER_URL: "No server URL configured"
 STR_FETCH_FEED_FAILED: "Failed to fetch feed"
 STR_PARSE_FEED_FAILED: "Failed to parse feed"
+STR_NEXT_PAGE: "Next Page »"
+STR_PREV_PAGE: "« Previous Page"
 STR_NETWORK_PREFIX: "Network: "
 STR_IP_ADDRESS_PREFIX: "IP Address: "
 STR_ERROR_GENERAL_FAILURE: "Error: General failure"
@@ -229,6 +231,7 @@ STR_THEME_LYRA_EXTENDED: "Lyra Extended"
 STR_SUNLIGHT_FADING_FIX: "Sunlight Fading Fix"
 STR_REMAP_FRONT_BUTTONS: "Remap Front Buttons"
 STR_OPDS_BROWSER: "OPDS Browser"
+STR_SEARCH: "Search"
 STR_COVER_CUSTOM: "Cover + Custom"
 STR_MENU_RECENT_BOOKS: "Recent Books"
 STR_NO_RECENT_BOOKS: "No recent books"

lib/I18n/translations/finnish.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Avaa tämä osoite selaimessasi"
 STR_OR_HTTP_PREFIX: "tai http://"
 STR_SCAN_QR_HINT: "tai skannaa QR-koodi puhelimellasi:"
 STR_CALIBRE_WIRELESS: "Calibre langaton"
-STR_CALIBRE_WEB_URL: "Calibre-verkko-osoite"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Salattu | + = Tallennettu"
 STR_MAC_ADDRESS: "MAC-osoite:"
 STR_CHECKING_WIFI: "Tarkistetaan WiFi..."

lib/I18n/translations/french.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Ouvrez cette URL dans un navigateur"
 STR_OR_HTTP_PREFIX: "ou http://"
 STR_SCAN_QR_HINT: "ou scannez le QR code :"
 STR_CALIBRE_WIRELESS: "Connexion Calibre sans fil"
-STR_CALIBRE_WEB_URL: "URL Web Calibre"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Sécurisé | + = Sauvegardé"
 STR_MAC_ADDRESS: "Adresse MAC :"
 STR_CHECKING_WIFI: "Vérification du WiFi…"

lib/I18n/translations/german.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Diese URL im Browser öffnen"
 STR_OR_HTTP_PREFIX: "oder http://"
 STR_SCAN_QR_HINT: "oder QR-Code mit dem Handy scannen:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "Calibre-Web-URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Verschlüsselt | + = Gespeichert"
 STR_MAC_ADDRESS: "MAC-Adresse:"
 STR_CHECKING_WIFI: "WLAN prüfen…"

lib/I18n/translations/hungarian.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Nyisd meg ezt az URL-t a böngésződben"
 STR_OR_HTTP_PREFIX: "vagy http://"
 STR_SCAN_QR_HINT: "vagy olvasd be a QR-kódot a telefonoddal:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "Calibre Web URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Titkosított | + = Mentett"
 STR_MAC_ADDRESS: "MAC-cím:"
 STR_CHECKING_WIFI: "WiFi ellenőrzése..."

lib/I18n/translations/italian.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Apri questo URL nel tuo browser"
 STR_OR_HTTP_PREFIX: "o http://"
 STR_SCAN_QR_HINT: "o scansiona il codice QR con il tuo telefono:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "URL Web Calibre"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Criptata | + = Salvata"
 STR_MAC_ADDRESS: "Indirizzo MAC:"
 STR_CHECKING_WIFI: "Controllo WiFi in corso..."

lib/I18n/translations/kazakh.yaml

@@ -44,7 +44,7 @@ STR_OPEN_URL_HINT: "Браузерде осы URL мекенжайын ашың
 STR_OR_HTTP_PREFIX: "немесе http://"
 STR_SCAN_QR_HINT: "немесе телефонмен QR кодын сканерлеңіз:"
 STR_CALIBRE_WIRELESS: "Calibre сымсыз"
-STR_CALIBRE_WEB_URL: "Calibre Web URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Шифрланған | + = Сақталған"
 STR_MAC_ADDRESS: "MAC мекенжайы:"
 STR_CHECKING_WIFI: "WiFi тексерілуде..."

lib/I18n/translations/lithuanian.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Atidarykite šį adresą naršyklėje"
 STR_OR_HTTP_PREFIX: "arba http://"
 STR_SCAN_QR_HINT: "arba nuskaitykite QR kodą:"
 STR_CALIBRE_WIRELESS: "Calibre belaidis"
-STR_CALIBRE_WEB_URL: "Calibre Web URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Užšifruota | + = Išsaugota"
 STR_MAC_ADDRESS: "MAC adresas:"
 STR_CHECKING_WIFI: "Tikrinamas WiFi..."

lib/I18n/translations/polish.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Otwórz ten URL w przeglądarce"
 STR_OR_HTTP_PREFIX: "albo http://"
 STR_SCAN_QR_HINT: "albo zeskanuj kod QR telefonem:"
 STR_CALIBRE_WIRELESS: "Bezprzewodowe połączenie z Calibre"
-STR_CALIBRE_WEB_URL: "Calibre Web URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Zaszyfrowane | + = Zapisane"
 STR_MAC_ADDRESS: "Adres MAC:"
 STR_CHECKING_WIFI: "Sprawdzanie WiFi..."

lib/I18n/translations/portuguese.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Abra este URL seu navegador"
 STR_OR_HTTP_PREFIX: "ou http://"
 STR_SCAN_QR_HINT: "ou escaneie o QR code com seu celular:"
 STR_CALIBRE_WIRELESS: "Calibre sem fio"
-STR_CALIBRE_WEB_URL: "URL do Calibre Web"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Criptografada | + = Salva"
 STR_MAC_ADDRESS: "Endereço MAC:"
 STR_CHECKING_WIFI: "Verificando Wi‑Fi..."

lib/I18n/translations/romanian.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Deschideţi acest URL în browserul dvs."
 STR_OR_HTTP_PREFIX: "sau http://"
 STR_SCAN_QR_HINT: "sau scanaţi codul QR cu telefonul dvs.:"
 STR_CALIBRE_WIRELESS: "Calibre Wireless"
-STR_CALIBRE_WEB_URL: "Calibre URL"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Criptat | + = Salvat"
 STR_MAC_ADDRESS: "Adresă MAC:"
 STR_CHECKING_WIFI: "Verificare WiFi..."

lib/I18n/translations/russian.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Откройте этот адрес в браузере"
 STR_OR_HTTP_PREFIX: "или http://"
 STR_SCAN_QR_HINT: "или отсканируйте QR-код:"
 STR_CALIBRE_WIRELESS: "Calibre по Wi-Fi"
-STR_CALIBRE_WEB_URL: "Web-адрес Calibre"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Защищена | + = Сохранена"
 STR_MAC_ADDRESS: "MAC-адрес:"
 STR_CHECKING_WIFI: "Проверка Wi-Fi..."

lib/I18n/translations/spanish.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Abra esta dirección en su navegador"
 STR_OR_HTTP_PREFIX: "o http://"
 STR_SCAN_QR_HINT: "o escanee el código QR con su móvil:"
 STR_CALIBRE_WIRELESS: "Calibre inalámbrico"
-STR_CALIBRE_WEB_URL: "URL del sitio web de Calibre"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* (Cifrado) | + (Guardado)"
 STR_MAC_ADDRESS: "MAC Address:"
 STR_CHECKING_WIFI: "Verificando Wi-Fi..."

lib/I18n/translations/swedish.yaml

@@ -45,7 +45,7 @@ STR_OPEN_URL_HINT: "Öppna denna adress i din browser"
 STR_OR_HTTP_PREFIX: "eller http://"
 STR_SCAN_QR_HINT: "eller skanna QR-kod med din telefon:"
 STR_CALIBRE_WIRELESS: "Calibre Trådlöst"
-STR_CALIBRE_WEB_URL: "Calibre webbadress"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Krypterad | + = Sparad"
 STR_MAC_ADDRESS: "MAC-adress:"
 STR_CHECKING_WIFI: "Kontrollerar trådlöst nätverk…"

lib/I18n/translations/turkish.yaml

@@ -44,7 +44,7 @@ STR_OPEN_URL_HINT: "Tarayıcınızda bu adresi açın"
 STR_OR_HTTP_PREFIX: "veya http://"
 STR_SCAN_QR_HINT: "veya telefonunuzla QR kodu tarayın:"
 STR_CALIBRE_WIRELESS: "Calibre Kablosuz"
-STR_CALIBRE_WEB_URL: "Calibre Web Adresi"
+STR_CALIBRE_WEB_URL: "OPDS URL"
 STR_NETWORK_LEGEND: "* = Şifreli | + = Kayıtlı"
 STR_MAC_ADDRESS: "MAC adresi:"
 STR_CHECKING_WIFI: "WiFi kontrol ediliyor..."