Add Browse Files button to snapshots screen

Select a snapshot and click Browse Files to see all files in that
snapshot on the remote. Also adds 'gniza snapshots browse' CLI command.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bin/gniza

@@ -305,8 +305,19 @@ run_cli() {
                     fi
                     _restore_remote_globals
                     ;;
+                browse)
+                    [[ -z "$target" ]] && die "browse requires --target=NAME"
+                    local snapshot=""
+                    snapshot=$(_parse_flag "--snapshot" "${SUBCMD_ARGS[@]+"${SUBCMD_ARGS[@]}"}") || true
+                    [[ -z "$snapshot" ]] && die "browse requires --snapshot=TS"
+                    if [[ -z "$remote" ]]; then
+                        remote=$(list_remotes | head -1)
+                        [[ -z "$remote" ]] && die "No remotes configured"
+                    fi
+                    list_snapshot_contents "$target" "$snapshot" "$remote"
+                    ;;
                 *)
-                    die "Unknown snapshots action: $action (expected list)"
+                    die "Unknown snapshots action: $action (expected list|browse)"
                     ;;
             esac
             ;;

tui/gniza.tcss

@@ -111,6 +111,7 @@ SelectionList {
 #targets-buttons,
 #remotes-buttons,
 #logs-buttons,
+#snapshots-buttons,
 #sched-buttons,
 #sched-edit-buttons,
 #te-buttons,
@@ -126,6 +127,7 @@ SelectionList {
 #targets-buttons Button,
 #remotes-buttons Button,
 #logs-buttons Button,
+#snapshots-buttons Button,
 #sched-buttons Button,
 #sched-edit-buttons Button,
 #te-buttons Button,

tui/screens/snapshots.py

@@ -6,6 +6,7 @@ from textual import work
 
 from tui.config import list_conf_dir
 from tui.backend import run_cli
+from tui.widgets import OperationLog
 
 
 class SnapshotsScreen(Screen):
@@ -27,7 +28,9 @@ class SnapshotsScreen(Screen):
                 yield Select([(r, r) for r in remotes], id="snap-remote", prompt="Select remote")
                 yield Button("Load Snapshots", id="btn-load", variant="primary")
                 yield DataTable(id="snap-table")
-            yield Button("Back", id="btn-back")
+                with Horizontal(id="snapshots-buttons"):
+                    yield Button("Browse Files", id="btn-browse")
+                    yield Button("Back", id="btn-back")
         yield Footer()
 
     def on_mount(self) -> None:
@@ -42,6 +45,19 @@ class SnapshotsScreen(Screen):
             self.app.pop_screen()
         elif event.button.id == "btn-load":
             self._load_snapshots()
+        elif event.button.id == "btn-browse":
+            self._browse_snapshot()
+
+    def _selected_snapshot(self) -> str | None:
+        try:
+            table = self.query_one("#snap-table", DataTable)
+            if table.cursor_row is not None and table.row_count > 0:
+                row_key = table.coordinate_to_cell_key((table.cursor_row, 0)).row_key.value
+                # The snapshot name is in the first (only) column
+                return str(table.get_cell(row_key, "Snapshot"))
+            return None
+        except Exception:
+            return None
 
     @work
     async def _load_snapshots(self) -> None:
@@ -58,11 +74,36 @@ class SnapshotsScreen(Screen):
         lines = [l.strip() for l in stdout.splitlines() if l.strip() and not l.startswith("===")]
         if lines:
             for s in lines:
-                table.add_row(s)
+                table.add_row(s, key=s)
         else:
             self.notify("No snapshots found", severity="warning")
             if stderr:
                 self.notify(stderr.strip(), severity="error")
 
+    @work
+    async def _browse_snapshot(self) -> None:
+        target_sel = self.query_one("#snap-target", Select)
+        remote_sel = self.query_one("#snap-remote", Select)
+        if not isinstance(target_sel.value, str) or not isinstance(remote_sel.value, str):
+            self.notify("Select target and remote first", severity="error")
+            return
+        snapshot = self._selected_snapshot()
+        if not snapshot:
+            self.notify("Select a snapshot first", severity="warning")
+            return
+        target = str(target_sel.value)
+        remote = str(remote_sel.value)
+        log_screen = OperationLog(f"Files: {target}/{snapshot}", show_spinner=False)
+        self.app.push_screen(log_screen)
+        rc, stdout, stderr = await run_cli(
+            "snapshots", "browse", f"--target={target}", f"--remote={remote}", f"--snapshot={snapshot}"
+        )
+        if stdout:
+            log_screen.write(stdout)
+        if stderr:
+            log_screen.write(stderr)
+        if not stdout and not stderr:
+            log_screen.write("No files found.")
+
     def action_go_back(self) -> None:
         self.app.pop_screen()