Review everything shipped this weekend, and fix what the reviewers caught

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

config/dot/hypr/monitors.lua

@@ -287,18 +287,25 @@ hl.monitor({
 -- empty monitor leaves the previous binding in place. So the config is the only
 -- honest source, and applying a change is a reload.
 if prefs.get("workspacesOnPrimaryOnly", false) == true then
-    local primary = nil
-    for output, entry in pairs(displays) do
-        if type(entry) == "table" and entry.primary == true
-            and type(output) == "string" and output:match("^[%w_.-]+$") ~= nil then
-            primary = output
-            break
+    -- Only a record display_entry accepts counts. A half-written entry is one
+    -- the monitor rules above already refuse, so pinning ten workspaces to it on
+    -- the strength of a `primary` flag nothing else trusts would put them on a
+    -- screen that never got a rule of its own.
+    local primaries = {}
+    for output, _ in pairs(displays) do
+        local entry = display_entry(output)
+        if entry ~= nil and entry.primary == true then
+            primaries[#primaries + 1] = output
         end
     end
 
     -- Without a primary there is nothing to pin to, and guessing one would move
-    -- every workspace onto whichever screen happened to sort first.
-    if primary ~= nil then
+    -- every workspace onto whichever screen happened to sort first. Two records
+    -- both claiming primary is the same problem wearing a different hat: pairs()
+    -- has no order, so picking one of them would pin the workspaces to a
+    -- different screen from one reload to the next. Neither case guesses.
+    if #primaries == 1 then
+        local primary = primaries[1]
         for i = 1, 10 do
             hl.workspace_rule({ workspace = tostring(i), monitor = primary })
         end