fix(i18n): Translate the remaining UI text (Git, hierarchy, pull requests, dialogs, aria labels) (#114)

Hard-coded UI text, titles and aria-labels in about 110 components (Git panels, hierarchy, pull requests, dialogs, settings, welcome) now go through tx; spliced fragments became whole sentences (fileCount, noneFoundLabel, hierarchyTitle) and pull request states use keyed messages. 225 zh entries added, stale fragment entries removed.

Also: tx used as a tag without interpolations (tx`No checks`) now looks the text up exactly instead of as a template, so it is translated like tx("No checks"); the text-catalog test checks such tags as plain literals. Check and test counts reuse the existing "{count} passed" / "{failed} failing" entries.

Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn
Co-authored-by: jaw52 <[email protected]>

src/features/database/SourceDialog.tsx

@@ -534,7 +534,7 @@ export function SourceDialog({
           {sshOn && (
             <>
               <span />
-              <span className={styles.formHint}>Reached from the SSH host {sshLabel({ ssh: sshUsed })}.</span>
+              <span className={styles.formHint}>{tx`Reached from the SSH host ${sshLabel({ ssh: sshUsed })}.`}</span>
             </>
           )}
           <label className={styles.formLabel} htmlFor="db-user">
@@ -916,8 +916,10 @@ export function SourceDialog({
           </Button>
           <span className={styles.formHint}>
             {initial?.id
-              ? "The Database tree shows only the checked names and patterns (* and ?); the connected database always shows."
-              : "Save the data source to pick from the server's names; patterns (* and ?) work any time."}
+              ? tx(
+                  "The Database tree shows only the checked names and patterns (* and ?); the connected database always shows.",
+                )
+              : tx("Save the data source to pick from the server's names; patterns (* and ?) work any time.")}
           </span>
         </div>
       </div>