fix: focus terminal on mount so keyboard input works immediately

The watch on isActive never fired on initial mount because the value
starts as true (Vue watch only triggers on changes). Added explicit
focus + fit in onMounted with a short delay for DOM readiness.
Also added @click handler on container as fallback focus mechanism.

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

src/components/terminal/TerminalView.vue

@@ -49,6 +49,7 @@
     <div
       ref="containerRef"
       class="terminal-container flex-1"
+      @click="handleFocus"
       @focus="handleFocus"
     />
   </div>
@@ -136,9 +137,15 @@ onMounted(() => {
   terminal.onResize(({ cols, rows }) => {
     sessionStore.setTerminalDimensions(props.sessionId, cols, rows);
   });
+
+  // Focus the terminal after mount so keyboard input works immediately
+  setTimeout(() => {
+    fit();
+    terminal.focus();
+  }, 50);
 });
 
-// Re-fit and focus terminal when this tab becomes active
+// Re-fit and focus terminal when switching back to this tab
 watch(
   () => props.isActive,
   (active) => {