v0.151.0 — the Megosztás page stops reloading, and says how to connect

S-1: /sharing/status coerced idle->running on the PHASE channel, so the first
poll of every steady-state page load reported a terminal job that never ran and
the client's repaint-reload fired ~1.2s apart, forever. The coercion's real duty
(liveness must never be contradicted) belongs to the 'running' LEVEL field
beside it, and is now pinned by its own regression test.

S-4 core: a terminal 'running' is served exactly once, so a REAL bring-up cannot
re-arm the reload on the page it just caused. failed/needs_password/in-flight
are never consumed. Unified async-job feedback stays the ROADMAP item.

S-2/S-5: new connect card with the Windows form, the Mac form and the direct
smb://<IP>, read from the SAMBA container's netns (the controller is on a docker
bridge and would answer 172.x). Derived per render, cached nowhere - the address
is a DHCP lease. Underivable => the line is omitted.

sharing.html's <script> block is byte-identical to v0.150.0. Red-proofed three
ways. 23/23 packages green.

controller/internal/stacks/manager.go

@@ -119,8 +119,18 @@ type Manager struct {
 	sambaPasswdFn func(password string) error
 	sambaRunFn    func() bool // replaces the docker-inspect liveness probe
 	sambaImgFn    func() bool // replaces the `docker image inspect` local-presence probe (4b card)
+	// sambaAddrFn replaces the docker-exec that reads the guest's LAN IPv4 out of the samba
+	// container's network namespace (v0.151.0, S-2/S-5 connect-address card).
+	sambaAddrFn func() (string, error)
 }
 
+// SetSambaRunProbe injects the samba liveness probe. Exported for the same reason
+// SetMigrationDoneHook and SetOffboxStreamRunner are: the seam has to be reachable from ANOTHER
+// package's tests — here internal/web, which needs a live-container world to prove that a live
+// container no longer manufactures a job phase (S-1). Production never calls it; nil keeps the real
+// docker-inspect probe.
+func (m *Manager) SetSambaRunProbe(fn func() bool) { m.sambaRunFn = fn }
+
 // NewManager creates a new stack manager.
 func NewManager(cfg *config.Config, logger *log.Logger) (*Manager, error) {
 	composeCmd := cfg.Stacks.ComposeCommand