Fix TypeScript compilation errors and consolidate version handling

🤖 Generated with [opencode](https://opencode.ai)

Co-Authored-By: opencode <noreply@opencode.ai>

packages/opencode/src/cli/cmd/upgrade.ts

@@ -1,6 +1,5 @@
 import type { Argv } from "yargs"
 import { UI } from "../ui"
-import { VERSION } from "../version"
 import * as prompts from "@clack/prompts"
 import { Installation } from "../../installation"
 
@@ -27,7 +26,7 @@ export const UpgradeCommand = {
       return
     }
     const target = args.target ?? (await Installation.latest())
-    prompts.log.info(`From ${VERSION} → ${target}`)
+    prompts.log.info(`From ${Installation.VERSION} → ${target}`)
     const spinner = prompts.spinner()
     spinner.start("Upgrading...")
     const err = await Installation.upgrade(method, target).catch((err) => err)
@@ -41,69 +40,5 @@ export const UpgradeCommand = {
     }
     spinner.stop("Upgrade complete")
     prompts.outro("Done")
-    return
-
-    /*
-    if (!process.execPath.includes(path.join(".opencode", "bin")) && false) {
-      return
-    }
-
-    const release = args.target
-      ? await specific(args.target).catch(() => {})
-      : await latest().catch(() => {})
-    if (!release) {
-      prompts.log.error("Failed to fetch release information")
-      prompts.outro("Done")
-      return
-    }
-
-    const target = release.tag_name
-
-    if (VERSION !== "dev" && compare(VERSION, target) >= 0) {
-      prompts.log.success(`Already up to date`)
-      prompts.outro("Done")
-      return
-    }
-
-    prompts.log.info(`From ${VERSION} → ${target}`)
-
-    const name = asset()
-    const found = release.assets.find((a) => a.name === name)
-
-    if (!found) {
-      prompts.log.error(`No binary found for platform: ${name}`)
-      prompts.outro("Done")
-      return
-    }
-
-    const spinner = prompts.spinner()
-    spinner.start("Downloading update...")
-
-    const downloadPath = await download(found.browser_download_url).catch(
-      () => {},
-    )
-    if (!downloadPath) {
-      spinner.stop("Download failed")
-      prompts.log.error("Download failed")
-      prompts.outro("Done")
-      return
-    }
-
-    spinner.stop("Download complete")
-
-    const renamed = await fs
-      .rename(downloadPath, process.execPath)
-      .catch(() => {})
-
-    if (renamed === undefined) {
-      prompts.log.error("Install failed")
-      await fs.unlink(downloadPath).catch(() => {})
-      prompts.outro("Done")
-      return
-    }
-
-    prompts.log.success(`Successfully upgraded to ${target}`)
-    prompts.outro("Done")
-    */
   },
 }