feat(doctor,shell): ollama host-service suggestion + hub-update hint (0.80.0)

Doctor: when the system AI uses an Ollama endpoint that no declared
host service covers (host:port match, /v1 suffix stripped), the
services panel says so in one sentence with a one-click 'declare as
host service' via the new DeclareService RPC — and states honestly
that it takes effect after a daemon restart (the restart button sits
on the same page). Pure suggestOllamaServiceEndpoint pins every
branch.

Shell: one slim, dismissible banner after connecting when the
release manifest offers a newer hub version; dismissal is persisted
per version so each release hints exactly once (pure
shouldShowUpdateHint + a widget test through the fake hub).
Deliberately manifest-based — Studio and hub versions are
independent counters, so a direct comparison would be wrong;
unreleased dev skew stays with the per-page classified states.
The probe stays inert under the test probe override: its timeout
timer leaked into hub_banner_test (the hermeticity class again).

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_de.arb

@@ -1191,6 +1191,14 @@
     }
   },
   "doctorSummaryDeclared": "deklariert",
+  "doctorOllamaSuggest": "Die System-KI nutzt Ollama auf {endpoint} — als Host-Dienst deklarieren, damit Module und Diagnose ihn kennen?",
+  "@doctorOllamaSuggest": {"placeholders": {"endpoint": {"type": "String"}}},
+  "doctorOllamaDeclareButton": "Als Host-Dienst deklarieren",
+  "doctorOllamaDeclared": "Als Host-Dienst „ollama“ deklariert — wirksam nach einem Daemon-Neustart (Knopf unten auf dieser Seite).",
+  "updateHintBanner": "Für den Hub ({local}) ist Version {latest} verfügbar.",
+  "@updateHintBanner": {"placeholders": {"local": {"type": "String"}, "latest": {"type": "String"}}},
+  "updateHintOpenDoctor": "Diagnose öffnen",
+  "updateHintDismiss": "Später",
   "svcExposureLoopback": "nur lokal",
   "svcExposurePrivate": "privates Netz",
   "svcExposurePublic": "öffentlich erreichbar",