Phase 1/4: terminal-style console UI (CLI mode)

app/src/main/java/io/github/abrarul/modularai/ConsoleActivity.kt

@@ -0,0 +1,73 @@
+package io.github.abrarul.modularai
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.lifecycleScope
+import io.github.abrarul.modularai.cli.Cli
+import kotlinx.coroutines.launch
+
+class ConsoleActivity : ComponentActivity() {
+    private val cli by lazy { Cli(this) }
+    private val lines = mutableStateListOf("ModularAI console. Type 'help'.")
+
+    private fun append(s: String) = runOnUiThread {
+        lines.add(s)
+        while (lines.size > 2000) lines.removeAt(0)
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            MaterialTheme(colorScheme = darkColorScheme()) {
+                var input by remember { mutableStateOf("") }
+                var busy by remember { mutableStateOf(false) }
+                val history = remember { mutableStateListOf<String>() }
+                var hIdx by remember { mutableIntStateOf(0) }
+                val list = rememberLazyListState()
+                LaunchedEffect(lines.size) { if (lines.isNotEmpty()) list.scrollToItem(lines.size - 1) }
+
+                fun run() {
+                    val cmd = input.trim()
+                    if (cmd.isEmpty() || busy) return
+                    input = ""; history.add(cmd); hIdx = history.size
+                    append("$ $cmd")
+                    busy = true
+                    lifecycleScope.launch {
+                        cli.exec(cmd, ::append)
+                        busy = false
+                    }
+                }
+
+                Column(Modifier.fillMaxSize().background(Color(0xFF0B0F14)).statusBarsPadding().navigationBarsPadding().imePadding()) {
+                    LazyColumn(Modifier.weight(1f).padding(horizontal = 8.dp), state = list) {
+                        items(lines) { Text(it, fontFamily = FontFamily.Monospace, fontSize = 12.sp, color = Color(0xFFD6E2F0)) }
+                    }
+                    Row(Modifier.fillMaxWidth().padding(8.dp)) {
+                        OutlinedTextField(
+                            value = input, onValueChange = { input = it },
+                            modifier = Modifier.weight(1f), singleLine = true,
+                            placeholder = { Text(if (busy) "running..." else "command") }
+                        )
+                        Spacer(Modifier.width(6.dp))
+                        Button(onClick = { if (hIdx > 0) { hIdx--; input = history[hIdx] } }, enabled = history.isNotEmpty()) { Text("^") }
+                        Spacer(Modifier.width(6.dp))
+                        Button(onClick = ::run, enabled = !busy) { Text("Run") }
+                    }
+                }
+            }
+        }
+    }
+}