Align banner info block on the logo baseline

The 3-line right block (brand/version, counts, /help hint) now sits at
the bottom of the 6-line ASCII logo instead of being top-aligned. Last
line of the right block aligns with "code v2.3.0" at the bottom of the
logo.

Implementation: add margin-top: 3 to #banner-info so its three lines
occupy rows 4-6. Removed the unused align/content-align declarations
that didn't take effect (Textual ignores align on a Horizontal sized
auto/auto since there is no leftover space to distribute).

22 snapshots regenerated to reflect the new baseline.

Author: obook

albert_code/cli/textual_ui/app.tcss

@@ -925,7 +925,6 @@ ContextProgress {
 }
 
 #banner-container {
-    align: left middle;
     padding: 0 1 0 0;
     width: auto;
 }
@@ -937,8 +936,7 @@ ContextProgress {
 #banner-info {
     width: auto;
     height: auto;
-    margin-left: 2;
-    content-align: left middle;
+    margin: 3 0 0 2;
 }
 
 .banner-line {