iPad: render multi-step / destructive shell pipelines as a step list

The desktop CommandStepsCard breaks a shell pipeline (a rm/git chain) into a
step list with the destructive delete flagged, instead of a raw blob. Rather
than duplicate a parser, deliver that value by reusing the existing, tested
HostCommandSummary + HostCommandBreakdown (a general command parser whose
Invocation already carries a `destructive` flag for rm/rmdir) on the two paths
that still showed raw text:

- ToolCallCard.details: a shell tool whose command has >1 invocation or is
  destructive now renders the compact step breakdown (deletes glyphed/tinted in
  red) with the literal command under "Show command"; simple one-liners keep the
  plain input block.
- ApprovalCardView: the parsed breakdown (with its sudo/deletes risk banner) now
  covers any Bash pipeline / destructive approval, not just host_exec.

Demo transcript gains a destructive cleanup pipeline (rm -rf && git worktree
prune && git branch -D) so the step list is exercisable offline.

Verified in the iPad simulator: the pipeline expands to a step list with
`rm -rf` flagged in red.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

NucleicRemote/NucleicRemote/Views/Transcript/ToolGroupRow.swift

@@ -49,10 +49,16 @@ struct ToolCallCard: View {
 
     @ViewBuilder private var details: some View {
         let input = group.input.approvalDetail
-        // A git commit reads as a structured commit card (subject + Markdown body), like the Mac —
-        // the raw command stays one tap away under "Show command".
+        // A git commit reads as a structured commit card (subject + Markdown body); a multi-step or
+        // destructive shell pipeline reads as a compact step list (deletes flagged in red) — both
+        // like the Mac, with the literal command one tap away under "Show command". Everything else
+        // keeps the plain input block.
         if isShellTool, let commit = GitCommitSummary.parse(input) {
             GitCommitCard(commit: commit, rawCommand: input)
+        } else if isShellTool, let summary = HostCommandSummary.summary(for: input),
+                  summary.invocations.count > 1 || summary.isDestructive {
+            HostCommandBreakdown(summary: summary, showPurpose: false)
+            CommandDisclosure(command: input, accent: Palette.accent)
         } else if !input.isEmpty {
             ToolBlock(label: "Input", text: input, mono: true)
         }