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>

includes/LegalAnalysisAgent.php

@@ -28,6 +28,8 @@ final class DbnLegalAnalysisAgent
 
     /** Persona system prompt (from the resolved chat profile); null ⇒ use the built-in barnevern prompt. */
     private ?string $personaPrompt = null;
+    /** Persona slug driving the per-track reviewer model; default = child-welfare (family track). */
+    private string $personaSlug = 'child-welfare';
 
     public function withPersonaPrompt(?string $prompt): self
     {
@@ -36,6 +38,15 @@ final class DbnLegalAnalysisAgent
         return $this;
     }
 
+    public function withPersonaSlug(?string $slug): self
+    {
+        $slug = is_string($slug) ? trim($slug) : '';
+        if ($slug !== '') {
+            $this->personaSlug = $slug;
+        }
+        return $this;
+    }
+
     public function __construct()
     {
         // On Azure: gpt-4o-mini for extraction/synthesis. On Bedrock: factory picks Haiku/Sonnet.
@@ -408,11 +419,12 @@ PROMPT;
             $userMsg .= "\n\n" . $ctxLabel . ': ' . $issue['brief_context'];
         }
         if ($corpusContext !== '') {
+            $product  = dbnToolsProductName();
             $srcLabel = match ($language) {
-                'no'    => 'Relevante kilder fra Do Better Norge-korpuset',
-                'pl'    => 'Istotne źródła z korpusu Do Better Norge',
-                'uk'    => 'Релевантні джерела з корпусу Do Better Norge',
-                default => 'Relevant sources from the Do Better Norge corpus',
+                'no'    => 'Relevante kilder fra ' . $product . '-korpuset',
+                'pl'    => 'Istotne źródła z korpusu ' . $product,
+                'uk'    => 'Релевантні джерела з корпусу ' . $product,
+                default => 'Relevant sources from the ' . $product . ' corpus',
             };
             $userMsg .= "\n\n" . $srcLabel . ":\n" . $corpusContext;
         }
@@ -613,7 +625,9 @@ PROMPT;
         try {
             $legalCheck = dbnToolsRunLegalCheck(
                 mb_strimwidth($synth['overall_assessment'], 0, 800),
-                $docType
+                $docType,
+                $this->personaPrompt,
+                $this->personaSlug
             );
         } catch (Throwable) {}