Install markitdown PDF dependencies for command reliability

Use markitdown[all] in setup/startup and track extras installation marker so /to-markdown can process PDFs without hanging on missing converter dependencies.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: GitHub Copilot CLI

.devcontainer/setup.sh

@@ -110,6 +110,20 @@ else
     echo "   ✅ uv 既にインストール済み: $(uv --version 2>/dev/null || echo 'version unknown')"
 fi
 
+MARKITDOWN_EXTRAS_MARKER="/home/vscode/.local/share/uv/tools/markitdown/.ecc-all-extras"
+if command -v uv &> /dev/null; then
+    if ! command -v markitdown &> /dev/null || [[ ! -f "$MARKITDOWN_EXTRAS_MARKER" ]]; then
+        echo "📄 markitdown[all] をインストール中..."
+        if uv tool install --upgrade "markitdown[all]"; then
+            mkdir -p "$(dirname "$MARKITDOWN_EXTRAS_MARKER")"
+            touch "$MARKITDOWN_EXTRAS_MARKER"
+            echo "   ✅ markitdown[all] インストール完了"
+        else
+            echo "   ⚠️  markitdown[all] インストールに失敗しました"
+        fi
+    fi
+fi
+
 # ECC の設定適用
 echo "   ECC設定を適用中..."
 

.devcontainer/startup.sh

@@ -222,12 +222,17 @@ if ! command -v uv >/dev/null 2>&1; then
     fi
 fi
 
-if command -v uv >/dev/null 2>&1 && ! command -v markitdown >/dev/null 2>&1; then
-    echo "📦 markitdown を uv でインストール中..."
-    if uv tool install markitdown >/tmp/markitdown-install.log 2>&1; then
-        echo "✅ markitdown インストール完了"
-    else
-        echo "⚠️  markitdown インストール失敗 (ログ: /tmp/markitdown-install.log)"
+MARKITDOWN_EXTRAS_MARKER="/home/vscode/.local/share/uv/tools/markitdown/.ecc-all-extras"
+if command -v uv >/dev/null 2>&1; then
+    if ! command -v markitdown >/dev/null 2>&1 || [ ! -f "$MARKITDOWN_EXTRAS_MARKER" ]; then
+        echo "📦 markitdown[all] を uv でインストール中..."
+        if uv tool install --upgrade "markitdown[all]" >/tmp/markitdown-install.log 2>&1; then
+            mkdir -p "$(dirname "$MARKITDOWN_EXTRAS_MARKER")"
+            touch "$MARKITDOWN_EXTRAS_MARKER"
+            echo "✅ markitdown[all] インストール完了"
+        else
+            echo "⚠️  markitdown[all] インストール失敗 (ログ: /tmp/markitdown-install.log)"
+        fi
     fi
 fi