diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dd84168..d10fd6e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,7 @@ name: CI/CD
 
 on:
   push:
-    branches: [ main ]
+    branches: [ main, beta ]
     tags: ['v*']
     paths-ignore:
       - '**.md'
@@ -126,7 +126,7 @@ jobs:
     if: |
       always() &&
       github.event_name != 'pull_request' &&
-      (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')) &&
+      (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/beta' || startsWith(github.ref, 'refs/tags/v')) &&
       (startsWith(github.ref, 'refs/tags/v') ||
         needs.changes.outputs.backend == 'true' ||
         needs.changes.outputs.frontend == 'true') &&
@@ -181,8 +181,11 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           images: ${{ env.IMAGE_PREFIX }}/${{ matrix.component }}
+          flavor: |
+            latest=false
           tags: |
-            type=ref,event=branch
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=raw,value=beta,enable=${{ github.ref == 'refs/heads/beta' }}
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
             type=sha,prefix=
diff --git a/frontend/src/components/Editor/Editor.jsx b/frontend/src/components/Editor/Editor.jsx
index fbc578b..e72559a 100644
--- a/frontend/src/components/Editor/Editor.jsx
+++ b/frontend/src/components/Editor/Editor.jsx
@@ -136,6 +136,7 @@ class SlashMenuView {
       content: this.content,
       debounce: 50,
       shouldShow: (view) => {
+        if (view.composing) return false
         const currentText = this.provider.getContent(
           view,
           (node) => ['paragraph', 'heading'].includes(node.type.name)
@@ -230,6 +231,9 @@ class SlashMenuView {
   update(view) {
     this.view = view
     this.editorViewRef.current = view
+    // Don't query or mutate menu state mid-IME — coordsAtPos / DOM writes
+    // triggered here can drop in-flight composition characters on Windows.
+    if (view.composing) return
     this.provider.update(view)
   }
 
@@ -453,6 +457,10 @@ const Editor = forwardRef(function Editor({ defaultValue = '', onChange, onDrawi
           return {
             update(view) {
               wikilinkMenu._view = view
+              // Bail during IME composition: coordsAtPos + DOM writes from
+              // show()/hide() can disturb the active composition on Windows,
+              // making characters disappear and the cursor jump.
+              if (view.composing) return
               const { state } = view
               const { selection } = state
               if (!(selection instanceof TextSelection)) {
@@ -516,6 +524,12 @@ const Editor = forwardRef(function Editor({ defaultValue = '', onChange, onDrawi
           ctx.set(rootCtx, containerRef.current)
           ctx.set(defaultValueCtx, defaultValue)
           ctx.get(listenerCtx).markdownUpdated((_ctx, markdown) => {
+            // Skip parent state updates while IME composition is active —
+            // the React re-render they trigger can interrupt composition on
+            // Windows. ProseMirror dispatches a final transaction at
+            // compositionend, which fires the listener again with the
+            // committed text, so no input is lost.
+            if (editorViewRef.current?.composing) return
             onChangeRef.current?.(markdown)
           })
           let slashMenuView = null