v1.0.5: Fix history viewer - ContentConverter JsonElement type bug

- ContentConverter.tipTapToHtml() had same JsonObject.asMap() bug as tiptapToMarkdown
- All as? String casts silently returned null, producing empty HTML
- Now uses Gson TypeToken<Map<String, Any?>> for proper deserialization
- Added contentToHtml() that handles String (HTML), Map (TipTap), and JSON string
- Fixed heading level cast (Gson deserializes numbers as Double, not Int)
- VersionViewerActivity handles all content types correctly

app/build.gradle.kts

@@ -20,8 +20,8 @@ android {
         applicationId = "com.docmost.app"
         minSdk = 26
         targetSdk = 34
-        versionCode = 5
-        versionName = "1.0.4"
+        versionCode = 6
+        versionName = "1.0.5"
     }
 
     signingConfigs {

app/src/main/java/com/docmost/app/ui/VersionViewerActivity.kt

@@ -109,13 +109,26 @@ class VersionViewerActivity : AppCompatActivity() {
         CoroutineScope(Dispatchers.IO).launch {
             try {
                 val history = api.getPageHistoryInfo(pageId, historyId)
-                val htmlContent = if (history.content != null) {
+                val htmlContent: String
+                if (history.content != null) {
+                    val content = history.content
+                    if (content is String && content.trimStart().startsWith("<")) {
+                        htmlContent = content
+                        originalTipTapJson = ""
+                    } else if (content is Map<*, *>) {
                         val gson = Gson()
-                    val json = gson.toJson(history.content)
-                    originalTipTapJson = json
-                    ContentConverter.tipTapToHtml(json)
+                        originalTipTapJson = gson.toJson(content)
+                        htmlContent = ContentConverter.contentToHtml(content)
+                    } else if (content is String) {
+                        originalTipTapJson = content
+                        htmlContent = ContentConverter.tipTapToHtml(content)
                     } else {
-                    "<p>Sin contenido</p>"
+                        htmlContent = "<p>Sin contenido</p>"
+                        originalTipTapJson = ""
+                    }
+                } else {
+                    htmlContent = "<p>Sin contenido</p>"
+                    originalTipTapJson = ""
                 }
 
                 withContext(Dispatchers.Main) {

app/src/main/java/com/docmost/app/utils/ContentConverter.kt

@@ -1,16 +1,16 @@
 package com.docmost.app.utils
 
 import com.google.gson.Gson
-import com.google.gson.JsonObject
+import com.google.gson.reflect.TypeToken
 
 object ContentConverter {
     private val gson = Gson()
 
     fun tipTapJsonToHtml(tipTapJson: String): String {
         return try {
-            val doc = gson.fromJson(tipTapJson, JsonObject::class.java).asMap()
-            @Suppress("UNCHECKED_CAST")
-            nodeToHtml(doc as Map<String, Any?>)
+            val type = object : TypeToken<Map<String, Any?>>() {}.type
+            val doc: Map<String, Any?> = gson.fromJson(tipTapJson, type)
+            nodeToHtml(doc)
         } catch (e: Exception) {
             tipTapJson
         }
@@ -18,14 +18,34 @@ object ContentConverter {
 
     fun tipTapToHtml(tipTapJson: String): String {
         return try {
-            val doc = gson.fromJson(tipTapJson, JsonObject::class.java).asMap()
-            @Suppress("UNCHECKED_CAST")
-            nodeToHtml(doc as Map<String, Any?>)
+            val type = object : TypeToken<Map<String, Any?>>() {}.type
+            val doc: Map<String, Any?> = gson.fromJson(tipTapJson, type)
+            nodeToHtml(doc)
         } catch (e: Exception) {
             tipTapJson
         }
     }
 
+    fun contentToHtml(content: Any?): String {
+        if (content == null) return "<p>Sin contenido</p>"
+        if (content is String) {
+            return if (content.trimStart().startsWith("<")) {
+                content
+            } else {
+                tipTapToHtml(content)
+            }
+        }
+        if (content is Map<*, *>) {
+            @Suppress("UNCHECKED_CAST")
+            return try {
+                nodeToHtml(content as Map<String, Any?>)
+            } catch (e: Exception) {
+                "<p>Error converting content</p>"
+            }
+        }
+        return "<p>Sin contenido</p>"
+    }
+
     private fun nodeToHtml(node: Map<String, Any?>): String {
         val type = node["type"] as? String
 
@@ -74,7 +94,13 @@ object ContentConverter {
                 sb.append("</p>")
             }
             "heading" -> {
-                val level = (node["attrs"] as? Map<*, *>)?.get("level") as? Int ?: 1
+                val levelRaw = (node["attrs"] as? Map<*, *>)?.get("level")
+                val level = when (levelRaw) {
+                    is Int -> levelRaw
+                    is Double -> levelRaw.toInt()
+                    is Number -> levelRaw.toInt()
+                    else -> 1
+                }
                 sb.append("<h$level>")
                 content?.forEach { child ->
                     if (child is Map<*, *>) {