polish: rebrand to Fleet Ops, add trilingual i18n, adaptive demo guide, and UX overhaul

Rebrands the product from MobilityOps to Fleet Ops across the UI, backend defaults and
knowledge base, and makes nl-BE/en-GB/fr-BE full first-class languages: i18next with
eager-bundled per-namespace resources, a persisted accessible language switcher (topbar
and mobile drawer), locale-aware date/number formatting, and a coverage test that fails
the build on any missing or empty translation key.

Backend dynamic content (demo scenarios, blocked-reason text, integration status) moves
from fixed English/Dutch prose to stable message codes + params so the frontend can
localize it; the demo knowledge base gains a fully translated NL/EN/FR procedure corpus
(11 documents each) with per-language retrieval and localized evidence-state messages.

The Demo Guide becomes breakpoint-adaptive: a docked rail on extra-wide desktop, a
floating panel that auto-collapses to a persistent, closable progress chip on standard
desktop/tablet, and a collapsed/half/full bottom sheet on mobile -- with scroll+focus+
highlight on "go to this step", Escape handling, and reduced-motion support.

The Data Quality Workbench gets accessible choice-card decisions with a clear primary/
secondary/tertiary action hierarchy; the Automation ledger groups repeated successes and
uses meaningful short refs; the Audit trail groups events by correlation id with human
action labels and readable before/after diffs. Attention Queue, Today's movements,
Vehicles, Bookings and Data Quality rows are fully clickable (stretched-link pattern)
with independent secondary links, keyboard support and mobile touch targets.

Fixes a topbar overflow on mobile caused by the new language switcher (moved into the
mobile drawer at <=960px) and two dangling aria-labelledby references introduced this
session. Updates all affected Playwright specs for the new nl-BE default and the new
Audit/DemoGuide DOM structure, and adds new i18n-coverage, demo-guide-adaptive and
clickable-rows specs. 131 backend tests, Ruff and mypy, and 71 Playwright tests pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backend/tests/test_demo_manifest.py

@@ -44,12 +44,11 @@ def test_demo_manifest_scenarios_ready_after_fresh_reset(client):
     scenarios = {s["id"]: s for s in body["scenarios"]}
     for scenario_id, scenario in scenarios.items():
         assert scenario["ready"] is True, f"{scenario_id} should be ready right after a reset"
-        assert scenario["blocked_reason"] is None
+        assert scenario["blocked_reason_code"] is None
         assert scenario["start_path"]
 
 
 def test_demo_manifest_ragcore_labelled_as_demo_mode_not_live(client):
     body = client.get("/api/v1/demo/manifest").json()
     ragcore = next(i for i in body["integrations"] if i["key"] == "ragcore")
-    assert "Demomodus" in ragcore["status_label"]
-    assert "RAGcore" not in ragcore["status_label"]
+    assert ragcore["status_code"] == "demoMode"

backend/tests/test_knowledge.py

@@ -32,7 +32,52 @@ def test_demo_provider_health_reports_document_count():
     health = provider.health()
     assert health.provider == "demo"
     assert health.available is True
-    assert health.document_count == 10
+    assert health.document_count == 11
+
+
+def test_demo_provider_health_reports_document_count_per_language():
+    provider = DemoKnowledgeProvider()
+    for language in ("nl-BE", "en-GB", "fr-BE"):
+        assert provider.health(language).document_count == 11
+
+
+def test_demo_provider_grounds_damage_question_in_dutch():
+    provider = DemoKnowledgeProvider()
+    answer = provider.ask(
+        "Wat moet ik doen als een voertuig terugkomt met schade?",
+        "test-correlation-nl",
+        "nl-BE",
+    )
+    assert answer.evidence_state == "grounded"
+    document_ids = {s.document_id for s in answer.sources}
+    assert "damage-procedure" in document_ids
+
+
+def test_demo_provider_grounds_damage_question_in_french():
+    provider = DemoKnowledgeProvider()
+    answer = provider.ask(
+        "Que dois-je faire quand un véhicule revient avec des dommages ?",
+        "test-correlation-fr",
+        "fr-BE",
+    )
+    assert answer.evidence_state == "grounded"
+    document_ids = {s.document_id for s in answer.sources}
+    assert "damage-procedure" in document_ids
+
+
+def test_demo_provider_insufficient_evidence_message_is_localized():
+    provider = DemoKnowledgeProvider()
+    nl_answer = provider.ask(
+        "Wat is de hoofdstad van Frankrijk?", "test-correlation-nl-2", "nl-BE"
+    )
+    fr_answer = provider.ask(
+        "Quelle est la capitale de la France ?", "test-correlation-fr-2", "fr-BE"
+    )
+    assert nl_answer.evidence_state == "insufficient"
+    assert fr_answer.evidence_state == "insufficient"
+    assert nl_answer.answer != fr_answer.answer
+    assert "France" not in nl_answer.answer
+    assert "France" not in fr_answer.answer
 
 
 def test_ask_question_endpoint_grounded(ops_client):