The strip grows a Sync tab — a standing placeholder, nothing in it yet

BoardInfoTab gains .sync last in the strip, rendering BoardSyncTabView's one
honest caption. The tab claims the position where 07's remote half will
live without ruling where its setup surfaces land — that stays the open
Redesign card's question.

Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY

Kanban/UI/Board/BoardSyncTabView.swift

@@ -0,0 +1,32 @@
+import SwiftUI
+
+/// **The board popover's Sync tab — a standing placeholder** (03-board-ui.md § Board popover,
+/// added 2026-08-07, the same night the settings sheet retired).
+///
+/// The tab exists ahead of its contents, deliberately: the strip claims the position where the
+/// remote half of the git story will live — tracking, Pull/Push, the status badges, and whatever
+/// home the setup surfaces (remote, credentials, SSH) are ruled into — so that when
+/// 07-sync-collab.md's cards land they land *in* a surface rather than re-arguing the strip. None
+/// of that is ruled by this file: the open question is the Redesign board's
+/// ("Rule a home for 07's remote and credential setup surfaces"), and a placeholder that decided it
+/// by accident would be the worst way to answer it.
+///
+/// What renders meanwhile is one honest sentence in the posture notes' register
+/// (`BoardGitTabView`'s siblings): the fact, stated plainly — never a mock control, never a
+/// greyed-out preview of features that do not exist (06-history-undo.md ▸ Rules: teach, never look
+/// broken).
+struct BoardSyncTabView: View {
+
+    /// The popover's own padding figure (`BoardInfoView.inset`), matching every other tab's
+    /// parameter — the tab pads by this amount instead of restating the derivation.
+    let inset: CGFloat
+
+    var body: some View {
+        Text("Nothing here yet.")
+            .font(.caption)
+            .foregroundStyle(.secondary)
+            .fixedSize(horizontal: false, vertical: true)
+            .padding(inset)
+            .frame(maxWidth: .infinity, alignment: .leading)
+    }
+}