fix: local PowerShell garbled output + resize not propagating

Two issues:
1. convertEol was false for PTY sessions, but Windows ConPTY sends
   bare \n without \r. Now enabled on Windows PTY sessions (checked
   via navigator.platform). Unix PTY still false (driver handles it).

2. LocalTerminalView had no ResizeObserver, so the terminal never
   reflowed when the container size changed. Added ResizeObserver
   matching the SSH TerminalView pattern. Also added proper cleanup
   on unmount.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/terminal/LocalTerminalView.vue

@@ -9,7 +9,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted, watch } from "vue";
+import { ref, onMounted, onBeforeUnmount, watch } from "vue";
 import { invoke } from "@tauri-apps/api/core";
 import { useTerminal } from "@/composables/useTerminal";
 import "@/assets/css/terminal.css";
@@ -20,11 +20,20 @@ const props = defineProps<{
 }>();
 
 const containerRef = ref<HTMLElement | null>(null);
-const { terminal, mount, fit } = useTerminal(props.sessionId, "pty");
+const { terminal, mount, fit, destroy } = useTerminal(props.sessionId, "pty");
+let resizeObserver: ResizeObserver | null = null;
 
 onMounted(() => {
   if (containerRef.value) {
     mount(containerRef.value);
+
+    // Watch container size changes and refit terminal
+    resizeObserver = new ResizeObserver(() => {
+      if (props.isActive) {
+        fit();
+      }
+    });
+    resizeObserver.observe(containerRef.value);
   }
   setTimeout(() => {
     fit();
@@ -48,4 +57,12 @@ watch(
     }
   },
 );
+
+onBeforeUnmount(() => {
+  if (resizeObserver) {
+    resizeObserver.disconnect();
+    resizeObserver = null;
+  }
+  destroy();
+});
 </script>

src/composables/useTerminal.ts

@@ -70,7 +70,9 @@ export function useTerminal(sessionId: string, backend: 'ssh' | 'pty' = 'ssh'):
     cursorStyle: "block",
     scrollback: 10000,
     allowProposedApi: true,
-    convertEol: backend === 'ssh',
+    // SSH always needs EOL conversion. PTY needs it on Windows (ConPTY sends bare \n)
+    // but not on Unix (PTY driver handles LF→CRLF). navigator.platform is the simplest check.
+    convertEol: backend === 'ssh' || navigator.platform.startsWith('Win'),
     rightClickSelectsWord: false,
   });