fix(search): deduplicate profiles when multiple current positions exist (#109)

The LEFT JOIN on positions produced duplicate rows when a profile had
multiple current positions. Add DID-based dedup filter after mapping
DB results, keeping only the highest-ranked occurrence of each profile.

src/routes/search.ts

···
       LIMIT ${limitNum} OFFSET ${offsetNum}
     `);
 
-    const dbProfiles = results.rows.map((row) => {
-      const r = row as Record<string, unknown>;
-      const profile: Record<string, unknown> = {
-        did: r.did,
-        handle: r.handle,
-        headline: r.headline,
-        about: r.about,
-        claimed: true,
-      };
-      if (r.displayName != null) profile.displayName = r.displayName;
-      if (r.avatarUrl != null) profile.avatar = r.avatarUrl;
-      if (r.currentRole != null) profile.currentRole = r.currentRole;
-      if (r.currentCompany != null) profile.currentCompany = r.currentCompany;
-      return profile;
-    });
+    const seen = new Set<string>();
+    const dbProfiles = results.rows
+      .map((row) => {
+        const r = row as Record<string, unknown>;
+        const profile: Record<string, unknown> = {
+          did: r.did,
+          handle: r.handle,
+          headline: r.headline,
+          about: r.about,
+          claimed: true,
+        };
+        if (r.displayName != null) profile.displayName = r.displayName;
+        if (r.avatarUrl != null) profile.avatar = r.avatarUrl;
+        if (r.currentRole != null) profile.currentRole = r.currentRole;
+        if (r.currentCompany != null) profile.currentCompany = r.currentCompany;
+        return profile;
+      })
+      .filter((p) => {
+        const did = p.did as string;
+        if (seen.has(did)) return false;
+        seen.add(did);
+        return true;
+      });
 
     // Try AT Protocol handle resolution as fallback
     try {

tests/routes/search.test.ts

···
     expect(erlend.avatar).toBeUndefined();
   });
 
+  it('deduplicates profiles when multiple current positions exist', async () => {
+    // Insert a second current position for the same profile
+    await db
+      .insert(positions)
+      .values({
+        did: 'did:plc:search-with-role',
+        rkey: '3searchpos2',
+        companyName: 'Beta Inc',
+        title: 'Advisor',
+        startDate: '2024-01',
+        current: true,
+        createdAt: new Date(),
+      })
+      .onConflictDoNothing();
+
+    const res = await app.inject({ method: 'GET', url: '/api/search/profiles?q=TypeScript' });
+    expect(res.statusCode).toBe(200);
+    const body = res.json();
+    const matches = body.profiles.filter(
+      (p: { did: string }) => p.did === 'did:plc:search-with-role',
+    );
+    expect(matches).toHaveLength(1);
+
+    // Cleanup
+    await db.execute(
+      sql`DELETE FROM positions WHERE did = 'did:plc:search-with-role' AND rkey = '3searchpos2'`,
+    );
+  });
+
   it('does not leak rank field in response', async () => {
     const res = await app.inject({ method: 'GET', url: '/api/search/profiles?q=TypeScript' });
     const body = res.json();