cli + daemon: move test seams off package globals onto injected structs

CLI: introduce internal/cli.deps which owns every RPC/SSH/host-command
seam the tree used to reach through mutable package vars. Command
builders, orchestrators, and the completion helpers become methods on
*deps. Tests construct their own deps per case, so fakes no longer leak
across cases and tests are free to run in parallel.

Daemon: move workspaceInspectRepoFunc + workspaceImportFunc onto the
Daemon struct (workspaceInspectRepo / workspaceImport), mirroring the
existing guestWaitForSSH / guestDial pattern. Workspace-prepare tests
drop t.Parallel() guards now that they no longer mutate process-wide
state.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/cli/commands_internal.go

@@ -25,7 +25,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-func newInternalCommand() *cobra.Command {
+func (d *deps) newInternalCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:    "internal",
 		Hidden: true,