Fix Stage-1 layout regressions; ListView fills the pane

Three layouts collapsed in fe028a9, where the isMacChrome branches were
removed by a scripted edit that was wrong in two ways. The *bindings* were
dead by construction; the layout classes inside them were not, and nothing
replaced them.

- tab-bar: the edit appended a second `class` attribute to an element that
  already had one. A duplicate attribute is silently dropped, so the
  workspace strip lost h-9/pt-1/pl-1.5 entirely and collapsed under the
  title bar. Merged into one attribute, with a comment saying why there is
  exactly one. A template sweep found no other element carrying two.
- connection-manager + editor-window <header>: the edit deleted all five
  [class.h-*]/[class.pl-*] bindings and put nothing back, leaving both
  headers with no height and no left padding. Restored h-9 pl-3 (the
  non-mac arm) and dropped the now-false "on macOS this row IS the
  titlebar" comments — every window is frameless now.

Separately, the ListView never filled its panel: 7.css sets table-layout:
fixed but declares no width, so the table shrank to content and left a dead
grey gutter down the right of each pane. w-full is safe as a utility
precisely because 7.css declares no width for `skin` to outrank it with;
the unsized first <col> then absorbs the slack, which is what makes Name
elastic.

Verified on a live window capture, not from a build log: the tab strip has
its height back and both tables reach the pane edge. The connection-manager
window needs a click to reach and is unverified visually — its fix is a
verbatim copy of the editor-window one.

Co-Authored-By: Claude <noreply@anthropic.com>

ui/src/app/tab-bar/tab-bar.ts

@@ -38,11 +38,12 @@ const CONCURRENCY_CHOICES = [2, 3, 4, 6, 8] as const;
   selector: 'app-tab-bar',
   imports: [NgIcon],
   template: `
-    <!-- On macOS this row IS the titlebar (hiddenInset): taller, padded past the
-         traffic lights, and draggable. Elsewhere it's a normal compact row. -->
+    <!-- The workspace strip, directly under the title bar. Draggable so the
+         empty stretch between the tabs and the right-hand tools still moves the
+         frameless window. ONE class attribute: a second one is silently dropped
+         by the template parser, which is exactly how this row lost its height. -->
     <div
-      class="w7-toolbar relative flex items-center gap-0.5 border-b border-border bg-chrome pr-1.5 electrobun-webkit-app-region-drag"
-      class="h-9 pt-1 pl-1.5"
+      class="w7-toolbar relative flex h-9 items-center gap-0.5 border-b border-border bg-chrome pt-1 pr-1.5 pl-1.5 electrobun-webkit-app-region-drag"
     >
       <div
         #tabScroll