Avoid repeating Mumble server labels across columns

Collapse identical full-row labels only for Mumble while preserving mixed column data and repeated values from other providers. Add Qt native coverage and document live saved-server listening confirmation.

docs/testing/messaging.md

@@ -14,6 +14,12 @@ occupy history slots. Identical messages remain separate entries. Log messages
 can speak in the background without taking focus. Mumble's message entry and
 other text controls do not supply history.
 
+Mumble's server list can expose the same accessible label in every column,
+including Ping and Users. Full-row reading announces that label once when all
+columns repeat it. Rows containing distinct information retain their complete
+column text, including equal ping and user-count values. Other applications'
+tables retain repeated values.
+
 The legacy controls for separate conversation histories, room-name prefixes,
 typing announcements, and message verbosity are not yet ported.
 
@@ -148,6 +154,17 @@ Actual Pidgin listening, physical shortcuts, and Braille acceptance remain pendi
 
 ### Mumble live acceptance
 
+For server-list row reading, open Server Connect and move between two saved
+servers with Up/Down. Each server label should occur once per row announcement.
+Try a public listing too: any distinct ping or user-count text exposed by Mumble
+should remain present. Check channel/user navigation after connecting and a
+multi-column table in another application; equal values in separate columns
+must remain available there.
+
+Live listening confirmed that the repeated labels in two saved-server listings
+are spoken once after this fix. Public listings and physical Braille remain
+unverified for this change.
+
 1. Quit the current reader with **Cthulhu+Q**. Press **Ctrl+Escape**, then press
    **Shift+G**. These are separate key presses. The launch script rebuilds the
    reader and Braille helper, starts debug logging, and opens a test terminal.