The atrium's performance director keeps a fast-moving call sheet where each ensemble signs in with stage@act@priority. The sheet preserves exactly what they wrote—stage nicknames, stylized act titles, and a numeric priority that determines who rehearses first. By the time the sound check starts, the list is a scramble, making it hard to brief lighting or schedule the rotating platforms. The director needs a helper routine that transforms the raw entries into a neatly ordered list ready for broadcast to the crew.

Each returned string must read "priority - stage: act", preserving the original stage and act text. Sorting should use the integer priority segment first, then the stage name alphabetically, and finally the act title using case-insensitive comparison when both earlier keys match. The function may not alter the original list; it should build a fresh sequence while leaving every character in the recorded strings untouched.

Before doors open, coordination compares the helper's output with a master schedule. Anything out of position forces an on-the-fly reshuffle that delays rehearsals and confuses the crew radios. Provide a list that aligns perfectly, including the quiet case where no entries were captured and an empty list tells the director the atrium floor stays dark.

Example 1:

Input: entries = ["StageA@Lantern Waltz@2","StageB@Harbor Hymn@1","StageA@Lantern Waltz@1","StageC@Echo Lines@3"]
Output: ["1 - StageA: Lantern Waltz","1 - StageB: Harbor Hymn","2 - StageA: Lantern Waltz","3 - StageC: Echo Lines"]
Explanation: Priority controls first, with ties broken by stage and then act name.

Example 2:

Input: entries = ["NorthWing@Aurora Bloom@4","Center@ember chorus@4","Center@Ember Chorus@4"]
Output: ["4 - Center: Ember Chorus","4 - Center: ember chorus","4 - NorthWing: Aurora Bloom"]
Explanation: Priorities match, so stages sort alphabetically, and the act titles compare case-insensitively while preserving text.

Example 3:

Input: entries = ["Balcony@Solo Light@6"]
Output: ["6 - Balcony: Solo Light"]
Explanation: A single entry is reformatted without reordering.