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

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

config/dot/quickshell/scripts/panama-settings-docs

@@ -139,10 +139,23 @@ def read_entries():
             return (found.group(2) if found.group(2) is not None
                     else found.group(1).strip())
 
+        def default_value():
+            """The default, or None when the literal is a block rather than a value.
+
+            A "json" setting's `def:` opens an array or an object that runs for
+            twenty lines, and the scalar reader above captures only the bracket
+            that opened it. A Default column reading "[" documents nothing and
+            looks like a parsing bug, which is what it was mistaken for. None
+            renders as an em dash instead, and the schema stays the place to read
+            the shape.
+            """
+            value = scalar("def")
+            return None if value in ("[", "{") else value
+
         entry = {
             "key": name,
             "type": scalar("type"),
-            "default": scalar("def"),
+            "default": default_value(),
             "group": scalar("group"),
             "label": scalar("label"),
             "detail": scalar("detail"),