feat(#525): render reasoning.delta / reasoning.available stream (#543)

* feat(#525): add ReasoningDelta + ReasoningAvailable WsEvent types

* feat(#525): parse reasoning.delta + reasoning.available; route through reducer + StreamingState

* feat(#525): add reasoning streaming buffer to ChatStreamingController

* feat(#525): dispatch ReasoningDelta/ReasoningAvailable in ChatViewModel

* feat(#525): render collapsible ReasoningIndicator in chat list

* fix(#525): address review — icons+semantics, LocalHermesStatusColors, drop redundant ReasoningAvailable branch

* feat(#525): persist reasoningText on model, entity, mapper + Room migration 3->4

* feat(#525): reducer + streaming carry reasoningText onto message

* feat(#525): render persisted reasoning above each assistant bubble, drop global indicator

* nix: flake

* nix: flake

---------

Co-authored-by: M57 <m57@hermes-control.app>

app/src/main/java/com/m57/hermescontrol/data/local/ChatMessageEntity.kt

@@ -28,6 +28,8 @@ data class ChatMessageEntity(
     val role: String,
     @ColumnInfo(name = "content")
     val content: String,
+    @ColumnInfo(name = "reasoning_text")
+    val reasoningText: String = "",
     @ColumnInfo(name = "timestamp")
     val timestamp: Long,
     @ColumnInfo(name = "tool_name")

app/src/main/java/com/m57/hermescontrol/data/local/ChatMessageMapper.kt

@@ -22,6 +22,7 @@ fun ChatMessageEntity.toUiModel(): ChatMessage =
                 else -> MessageRole.ASSISTANT
             },
         content = content,
+        reasoningText = reasoningText,
         timestamp = timestamp,
         isStreaming = isStreaming,
         toolName = toolName,
@@ -40,6 +41,7 @@ fun ChatMessage.toEntity(sessionId: String): ChatMessageEntity =
         sessionId = sessionId,
         role = role.name,
         content = content,
+        reasoningText = reasoningText,
         timestamp = timestamp,
         toolName = toolName,
         toolStatus = toolStatus?.name,

app/src/main/java/com/m57/hermescontrol/data/local/HermesDatabase.kt

@@ -11,7 +11,7 @@ import java.io.File
 
 @Database(
     entities = [ChatMessageEntity::class],
-    version = 3,
+    version = 4,
     exportSchema = true,
 )
 abstract class HermesDatabase : RoomDatabase() {
@@ -45,13 +45,22 @@ abstract class HermesDatabase : RoomDatabase() {
                         }
                     }
 
+                val migration3to4 =
+                    object : Migration(3, 4) {
+                        override fun migrate(db: SupportSQLiteDatabase) {
+                            db.execSQL(
+                                "ALTER TABLE `chat_messages` ADD COLUMN `reasoning_text` TEXT NOT NULL DEFAULT ''",
+                            )
+                        }
+                    }
+
                 instance ?: Room
                     .databaseBuilder(
                         context.applicationContext,
                         HermesDatabase::class.java,
                         "hermes_control.db",
                     ).openHelperFactory(factory)
-                    .addMigrations(migration2to3)
+                    .addMigrations(migration2to3, migration3to4)
                     .fallbackToDestructiveMigration(false)
                     .build()
                     .also { instance = it }