feat: sync runtime search and schema quality updates from app repo

- port retrieval, validation, and eval improvements relevant to os
- align prompts and dimensions with the flat single-agent model
- replace the old eval suite with the focused core scenarios

Generated with Codex

app/api/dimensions/popular/route.ts

@@ -1,6 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getSQLiteClient } from '@/services/database/sqlite-client';
-import { eventBroadcaster } from '@/services/events';
 
 export const runtime = 'nodejs';
 
@@ -35,13 +34,12 @@ async function getPopularDimensionsSQLite() {
     )
     SELECT ad.name AS dimension, 
            COALESCE(dc.count, 0) AS count, 
-           COALESCE(dim.is_priority, 0) AS is_priority,
            dim.description
     FROM all_dimensions ad
     LEFT JOIN dimension_counts dc ON dc.dimension = ad.name
     LEFT JOIN dimensions dim ON dim.name = ad.name
     WHERE ad.name IS NOT NULL
-    ORDER BY is_priority DESC, LOWER(ad.name) ASC
+    ORDER BY LOWER(ad.name) ASC
   `);
 
   return NextResponse.json({
@@ -50,7 +48,7 @@ async function getPopularDimensionsSQLite() {
     data: result.rows.map((row: any) => ({
       dimension: row.dimension,
       count: Number(row.count),
-      isPriority: Boolean(row.is_priority),
+      isPriority: false,
       description: row.description || null
     }))
   });
@@ -67,7 +65,14 @@ export async function POST(request: NextRequest) {
       }, { status: 400 });
     }
 
-    return togglePrioritySQLite(dimension);
+    return NextResponse.json({
+      success: true,
+      data: {
+        dimension,
+        is_priority: false
+      },
+      message: 'Priority dimensions are no longer part of the product model.'
+    });
   } catch (error) {
     console.error('Error toggling dimension priority:', error);
     return NextResponse.json({ 
@@ -76,34 +81,3 @@ export async function POST(request: NextRequest) {
     }, { status: 500 });
   }
 }
-
-// PostgreSQL path removed in SQLite-only consolidation
-
-async function togglePrioritySQLite(dimension: string) {
-  const sqlite = getSQLiteClient();
-  
-  const result = sqlite.query(`
-    INSERT INTO dimensions(name, is_priority, updated_at) 
-    VALUES (?, 1, CURRENT_TIMESTAMP) 
-    ON CONFLICT(name) DO UPDATE SET 
-      is_priority = CASE WHEN is_priority=1 THEN 0 ELSE 1 END, 
-      updated_at = CURRENT_TIMESTAMP 
-    RETURNING is_priority
-  `, [dimension]);
-
-  const isPriority = Boolean(result.rows[0].is_priority);
-
-  // Broadcast dimension update event
-  eventBroadcaster.broadcast({
-    type: 'DIMENSION_UPDATED',
-    data: { dimension, isPriority }
-  });
-
-  return NextResponse.json({
-    success: true,
-    data: {
-      dimension,
-      is_priority: isPriority
-    }
-  });
-}