feat: IA profiles, server context and a workable token ceiling

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

src/main/java/dev/marcospaulo/canalhandia/AiProfile.java

@@ -0,0 +1,25 @@
+package dev.marcospaulo.canalhandia;
+
+/**
+ * How much work to do per question.
+ *
+ * <p>This trades latency, not money: the plan's token allowance is far beyond
+ * what a small server can spend, but every added context token makes chat feel
+ * slower.
+ */
+enum AiProfile {
+
+    /** Skip the wiki round trip. Fast, ungrounded. */
+    ECONOMICO,
+    /** Consult the wiki. Slower, accurate. */
+    PRECISO;
+
+    static AiProfile byKey(String key) {
+        for (AiProfile profile : values()) {
+            if (profile.name().equalsIgnoreCase(key)) {
+                return profile;
+            }
+        }
+        return PRECISO;
+    }
+}

src/main/java/dev/marcospaulo/canalhandia/Settings.java

@@ -252,7 +252,7 @@ final class Settings {
     }
 
     int aiMaxTokens() {
-        return Math.max(32, plugin.getConfig().getInt("ia.max-tokens", 300));
+        return Math.max(32, plugin.getConfig().getInt("ia.max-tokens", 1200));
     }
 
     double aiTemperature() {
@@ -297,6 +297,31 @@ final class Settings {
         set("ia.publico", value);
     }
 
+    AiProfile aiProfile() {
+        return AiProfile.byKey(plugin.getConfig().getString("ia.perfil", "PRECISO"));
+    }
+
+    void aiProfile(AiProfile profile) {
+        set("ia.perfil", profile.name());
+    }
+
+    /** How much article text to send. Lead paragraphs alone were not enough. */
+    int aiWikiChars() {
+        return Math.max(500, plugin.getConfig().getInt("ia.wiki-caracteres", 7000));
+    }
+
+    int aiMemoryExchanges() {
+        return Math.max(0, plugin.getConfig().getInt("ia.memoria-perguntas", 3));
+    }
+
+    int aiMemoryMinutes() {
+        return Math.max(1, plugin.getConfig().getInt("ia.memoria-minutos", 10));
+    }
+
+    String aiServerContext() {
+        return String.join(" ", plugin.getConfig().getStringList("ia.contexto"));
+    }
+
     // --- content ------------------------------------------------------------
 
     boolean categoryEnabled(Category category) {