claude: Read full version from version.txt in packaging config

When QUARTO_VERSION from configuration file is incomplete (e.g., "1.9"),
read the full version from version.txt (e.g., "1.9.17"). This ensures
bundled distributions report the correct version number and pass
extension quarto-required version checks.

Includes safeguard to only use version.txt if its major.minor matches
the configured version, preventing issues if version.txt gets out of sync.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: gordonwoodhull

package/src/common/config.ts

@@ -7,6 +7,7 @@
 
 import { join } from "../../../src/deno_ral/path.ts";
 import { info } from "../../../src/deno_ral/log.ts";
+import { existsSync } from "../../../src/deno_ral/fs.ts";
 
 import { getEnv } from "../util/utils.ts";
 
@@ -59,6 +60,20 @@ export function readConfiguration(
   const root = getEnv("QUARTO_ROOT");
   const src = getEnv("QUARTO_SRC_PATH");
 
+  // If version is incomplete (e.g., "1.9" from configuration file),
+  // try to read the full version from version.txt
+  if (version && version.split(".").length < 3) {
+    const versionTxtPath = join(root, "version.txt");
+    if (existsSync(versionTxtPath)) {
+      const versionTxt = Deno.readTextFileSync(versionTxtPath).trim();
+      // Only use version.txt if it starts with the same major.minor
+      // (e.g., version="1.9" and versionTxt="1.9.17")
+      if (versionTxt.startsWith(version + ".")) {
+        version = versionTxt;
+      }
+    }
+  }
+
   const pkg = getEnv("QUARTO_PACKAGE_PATH") || "package";
   const out = join(pkg, getEnv("QUARTO_OUT_DIR") || "out");