feat(i18n): finish the Czech translations

- Google Gemini 3 Pro with a few manual interventions and a proofread
- update the rest of TS files with `make update-translations`

Fixes #19514

Author: caybro

ui/i18n/qml_base_en.ts

@@ -2685,6 +2685,26 @@ Do you wish to override the security check and continue?</source>
         <source>Developer Tools</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Clear site data</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Use it to reset the current site if it doesn&apos;t load or work properly.</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Clearing cache...</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Clear cache</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Clears cached files, cookies, and history for the entire browser. Browsing is paused until it is done.</source>
+        <translation type="unfinished"></translation>
+    </message>
     <message>
         <source>Settings</source>
         <translation type="unfinished"></translation>

ui/i18n/qml_base_lokalise_en.ts

@@ -3288,6 +3288,31 @@
       <comment>BrowserSettingsMenu</comment>
       <translation>Developer Tools</translation>
     </message>
+    <message>
+      <source>Clear site data</source>
+      <comment>BrowserSettingsMenu</comment>
+      <translation>Clear site data</translation>
+    </message>
+    <message>
+      <source>Use it to reset the current site if it doesn&#39;t load or work properly.</source>
+      <comment>BrowserSettingsMenu</comment>
+      <translation>Use it to reset the current site if it doesn&#39;t load or work properly.</translation>
+    </message>
+    <message>
+      <source>Clearing cache...</source>
+      <comment>BrowserSettingsMenu</comment>
+      <translation>Clearing cache...</translation>
+    </message>
+    <message>
+      <source>Clear cache</source>
+      <comment>BrowserSettingsMenu</comment>
+      <translation>Clear cache</translation>
+    </message>
+    <message>
+      <source>Clears cached files, cookies, and history for the entire browser. Browsing is paused until it is done.</source>
+      <comment>BrowserSettingsMenu</comment>
+      <translation>Clears cached files, cookies, and history for the entire browser. Browsing is paused until it is done.</translation>
+    </message>
     <message>
       <source>Settings</source>
       <comment>BrowserSettingsMenu</comment>