diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index efca8434d8..42d7df6350 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,6 +60,11 @@ jobs:
     name: Rust Build Check (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     needs: frontend-build
+    env:
+      # Keep the workspace check plus desktop test profiles within hosted-runner disk limits.
+      CARGO_INCREMENTAL: "0"
+      CARGO_PROFILE_DEV_DEBUG: "0"
+      CARGO_PROFILE_TEST_DEBUG: "0"
     strategy:
       fail-fast: false
       matrix:
@@ -123,7 +128,7 @@ jobs:
 
       - uses: swatinem/rust-cache@v2
         with:
-          shared-key: "ci-check-v2-${{ runner.os }}-no-cargo-bin-v1"
+          shared-key: "ci-check-v3-${{ runner.os }}-no-cargo-bin-v1"
           cache-bin: false
           # PR caches are scoped to merge refs; main pushes own shared cache refreshes.
           save-if: ${{ github.event_name != 'pull_request' }}
diff --git a/.github/workflows/desktop-package.yml b/.github/workflows/desktop-package.yml
index f45f76430a..e2e8aab6b5 100644
--- a/.github/workflows/desktop-package.yml
+++ b/.github/workflows/desktop-package.yml
@@ -174,11 +174,14 @@ jobs:
             APPINDICATOR_PKG=libayatana-appindicator3-dev
           fi
 
+          # Tauri pins AppImage GTK input methods to its bundled cache, so the
+          # fcitx5 GTK3 bridge must be present before linuxdeploy builds it.
           sudo apt-get install -y --no-install-recommends \
             pkg-config \
             xdg-utils \
             libglib2.0-dev \
             libgtk-3-dev \
+            fcitx5-frontend-gtk3 \
             libxdo-dev \
             "$WEBKIT_PKG" \
             "$APPINDICATOR_PKG" \
@@ -220,6 +223,11 @@ jobs:
       - name: Build desktop app
         run: ${{ matrix.platform.build_command }}
 
+      - name: Verify AppImage fcitx5 GTK module
+        if: runner.os == 'Linux'
+        shell: bash
+        run: bash scripts/ci/verify-appimage-fcitx.sh "${{ matrix.platform.target }}"
+
       - name: Upload bundles
         uses: actions/upload-artifact@v6
         with:
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index b3c7fb3380..c350888f7d 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -120,11 +120,14 @@ jobs:
             APPINDICATOR_PKG=libayatana-appindicator3-dev
           fi
 
+          # Tauri pins AppImage GTK input methods to its bundled cache, so the
+          # fcitx5 GTK3 bridge must be present before linuxdeploy builds it.
           sudo apt-get install -y --no-install-recommends \
             pkg-config \
             xdg-utils \
             libglib2.0-dev \
             libgtk-3-dev \
+            fcitx5-frontend-gtk3 \
             libxdo-dev \
             "$WEBKIT_PKG" \
             "$APPINDICATOR_PKG" \
@@ -192,6 +195,11 @@ jobs:
       - name: Build desktop app
         run: ${{ matrix.platform.build_command }}
 
+      - name: Verify AppImage fcitx5 GTK module
+        if: runner.os == 'Linux'
+        shell: bash
+        run: bash scripts/ci/verify-appimage-fcitx.sh "${{ matrix.platform.target }}"
+
       - name: Upload bundles
         uses: actions/upload-artifact@v6
         with:
diff --git a/scripts/ci/verify-appimage-fcitx.sh b/scripts/ci/verify-appimage-fcitx.sh
new file mode 100644
index 0000000000..d609dd27e7
--- /dev/null
+++ b/scripts/ci/verify-appimage-fcitx.sh
@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+target="${1:?usage: verify-appimage-fcitx.sh <rust-target>}"
+bundle_dir="target/${target}/release/bundle/appimage"
+
+mapfile -t appimages < <(find "$bundle_dir" -maxdepth 1 -type f -name '*.AppImage' -print | sort)
+if [[ ${#appimages[@]} -ne 1 ]]; then
+  echo "Expected exactly one AppImage in ${bundle_dir}, found ${#appimages[@]}" >&2
+  exit 1
+fi
+
+appimage="$(realpath "${appimages[0]}")"
+work_dir="$(mktemp -d)"
+trap 'rm -rf "$work_dir"' EXIT
+
+(
+  cd "$work_dir"
+  chmod +x "$appimage"
+  "$appimage" --appimage-extract >/dev/null
+
+  module_path="$(find squashfs-root -name 'im-fcitx5.so' -print -quit)"
+  if [[ -z "$module_path" ]]; then
+    echo "AppImage does not contain the fcitx5 GTK3 input method module" >&2
+    exit 1
+  fi
+
+  cache_path=""
+  while IFS= read -r candidate; do
+    if grep -qi 'fcitx' "$candidate"; then
+      cache_path="$candidate"
+      break
+    fi
+  done < <(find squashfs-root -name 'immodules.cache' -type f -print)
+
+  if [[ -z "$cache_path" ]]; then
+    echo "AppImage GTK immodules.cache does not register fcitx5" >&2
+    exit 1
+  fi
+
+  echo "Verified AppImage fcitx5 GTK module: module=${module_path}, cache=${cache_path}"
+)
diff --git a/src/apps/desktop/tauri.conf.json b/src/apps/desktop/tauri.conf.json
index e7c18cc338..bc2d8949d5 100644
--- a/src/apps/desktop/tauri.conf.json
+++ b/src/apps/desktop/tauri.conf.json
@@ -24,8 +24,20 @@
     "linux": {
       "deb": {
         "depends": [
-          "libwebkit2gtk-4.1-0",
-          "libgtk-3-0"
+          "libc6",
+          "libcairo2",
+          "libgcc-s1",
+          "libgdk-pixbuf-2.0-0",
+          "libglib2.0-0",
+          "libjavascriptcoregtk-4.1-0",
+          "liblept5",
+          "liblzma5",
+          "libsoup-3.0-0",
+          "libtesseract5",
+          "libxcb1",
+          "libxdo3",
+          "tesseract-ocr-eng",
+          "zlib1g"
         ],
         "files": {
           "/usr/share/icons/hicolor/16x16/apps/bitfun-desktop.png": "icons/hicolor/16x16/apps/bitfun-desktop.png",