feat: implement robust multi-tier text input architecture and ADB diagnostics

- Android Text Input & IME Normalization:
  - Implement progressive 3-tier input architecture in AndroidAdbDriver and AndroidDeviceController:
    - Tier 1 (Primary): Zero-dependency clipboard injection + KEYCODE_PASTE (immune to IME Pinyin interception, full Unicode/Emoji support, preserves multiline formatting).
    - Tier 2 (Broadcast): Base64 broadcast injection when ADBKeyboard is active.
    - Tier 3 (Fallback): Native ADB physical keyevent fallback.
  - Add literal newline normalization (\r\n, \n, \r) to prevent JSON escape string corruption (e.g. '10086\n' -> '10086、n').
  - Add set_clipboard method to UIAutomatorClient without auxiliary APK requirements.

- Diagnostics & System Probes:
  - Add adb_keys diagnostics probe for ADB key auth checks.
  - Integrate diagnostics into CLI doctor command.

- Admin Console & Showcase UI:
  - Improve model service and system router in admin console.
  - Enhance workspace stream view and session state in showcase UI.

artemis/core/diagnostics/engine.py

@@ -133,11 +133,28 @@ class ReadinessEngine:
             timestamp=time.time(),
         )
 
+    async def heal_adb_keys(self, force: bool = False) -> dict[str, Any]:
+        """Auto-heal corrupted or 0-byte ADB authentication keys."""
+        from artemis.core.diagnostics.adb_keys import heal_adb_keys
+
+        logger.info("[ReadinessEngine] Auto-healing ADB authentication keys...")
+        return await asyncio.to_thread(heal_adb_keys, None, force)
+
     async def restart_adb_server(self) -> dict[str, Any]:
-        """Execute adb kill-server && adb start-server to recover connectivity."""
+        """Execute adb kill-server && adb start-server to recover connectivity, auto-healing corrupted keys if needed."""
+        from artemis.core.diagnostics.adb_keys import heal_adb_keys, inspect_adb_keys
+
         adb_path = shutil.which("adb") or "adb"
 
         def _restart_sync():
+            # If keys are corrupted, heal them first
+            key_status = inspect_adb_keys()
+            if key_status.is_corrupted:
+                logger.warning(
+                    f"[ReadinessEngine] Corrupted ADB keys detected ({key_status.error_reason}). Auto-healing..."
+                )
+                return heal_adb_keys(adb_path=adb_path)
+
             try:
                 subprocess.run(
                     [adb_path, "kill-server"],