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_en.arb

@@ -1215,6 +1215,14 @@
     }
   },
   "doctorSummaryDeclared": "declared",
+  "doctorOllamaSuggest": "The system AI uses Ollama at {endpoint} — declare it as a host service so modules and the doctor know it?",
+  "@doctorOllamaSuggest": {"placeholders": {"endpoint": {"type": "String"}}},
+  "doctorOllamaDeclareButton": "Declare as host service",
+  "doctorOllamaDeclared": "Declared as host service \"ollama\" — takes effect after a daemon restart (button further down this page).",
+  "updateHintBanner": "Version {latest} is available for the hub ({local}).",
+  "@updateHintBanner": {"placeholders": {"local": {"type": "String"}, "latest": {"type": "String"}}},
+  "updateHintOpenDoctor": "Open Doctor",
+  "updateHintDismiss": "Later",
   "svcExposureLoopback": "local only",
   "svcExposurePrivate": "private network",
   "svcExposurePublic": "publicly reachable",