feat(tools): reposition as Do Better Legal two-track Norwegian-law MCP

De-family-ify shared JSON tools (persona-aware routing + neutral base
prompt), make the verification review pick its engine per track
(family/child-welfare -> dbn-legal-agent-v3, others -> gpt-4o interim),
and route product-name strings through dbnToolsProductName(). Rebrand the
MCP/tools surface (mcp.php + i18n mcp_* strings) to Do Better Legal.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

api/legal-analysis.php

@@ -64,7 +64,8 @@ try {
     $personaResolved = dbnToolsResolvePersona((int)$client['id'], $personaSlug);
 
     $agent = (new DbnLegalAnalysisAgent())
-        ->withPersonaPrompt($personaResolved['system_prompt'] ?? null);
+        ->withPersonaPrompt($personaResolved['system_prompt'] ?? null)
+        ->withPersonaSlug($personaResolved['slug'] ?? $personaSlug);
 
     // Pass 1 — extract issues (Azure, fast); deduct credit AFTER this succeeds
     $emit('progress', ['step' => 'extracting_issues', 'detail' => 'Identifying distinct legal issues…']);
@@ -132,7 +133,8 @@ try {
         $legalCheck = dbnToolsRunLegalCheck(
             mb_strimwidth((string)($synth['overall_assessment'] ?? ''), 0, 800),
             $docType,
-            $personaResolved['system_prompt'] ?? null
+            $personaResolved['system_prompt'] ?? null,
+            $personaResolved['slug'] ?? $personaSlug
         );
     } catch (Throwable) {}