feat(tools): converge two-tier Quick/Pro selector onto .no fork

Port the dobetterlegal-tools two-tier quality stack to dobetternorge.no:
QUALITY_TIERS registry + resolveTier (ToolModels), dbnToolsResolveToolRun
(bootstrap), tier read+charge in the 6 analytical endpoints, Quick/Pro
UI + payload.tier on the 6 tool pages/JS, and the bounded
corpusContextForSummarize RAG fix (per-passage trim + total budget +
reranker_enabled). Back-compat: requests without `tier` keep legacy
engine behavior.

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

assets/js/deep-research.js

@@ -42,7 +42,7 @@
       traceList: document.getElementById('traceList'),
       slices: Array.from(document.querySelectorAll('.dr-slice')),
       langButtons: Array.from(document.querySelectorAll('#drLangSwitcher .lang-btn')),
-      engineRadios: Array.from(document.querySelectorAll('input[name="drEngine"]')),
+      tierRadios: Array.from(document.querySelectorAll('input[name="drTier"]')),
       personaControl: document.getElementById('drPersonaControl'),
       personaSelect: document.getElementById('drPersonaSelect'),
       subQ: document.getElementById('drSubQ'),
@@ -280,9 +280,9 @@
     return out;
   }
 
-  function getEngine() {
-    const checked = els.engineRadios.find((r) => r.checked);
-    return checked ? checked.value : 'azure_mini';
+  function getTier() {
+    const checked = els.tierRadios.find((r) => r.checked);
+    return checked ? checked.value : 'quick';
   }
 
   function getControls() {
@@ -308,10 +308,10 @@
       return;
     }
 
-    const engine = getEngine();
-    const expectedDuration = engine === 'azure_full'
-      ? '60–180 seconds with Azure gpt-4o'
-      : (engine === 'gpu' ? '30–90 seconds on GPU' : '15–45 seconds with Azure gpt-4o-mini');
+    const tier = getTier();
+    const expectedDuration = tier === 'pro'
+      ? '60–180 seconds with Claude Sonnet'
+      : '15–45 seconds with Claude Haiku';
 
     setStatus(`Running deep research… (${expectedDuration})`, 'busy');
     els.runButton.disabled = true;
@@ -325,7 +325,7 @@
       query,
       paste_text: '',
       slices,
-      engine,
+      tier,
       language: lang,
       controls: getControls(),
     };