mini: add reconnect, forms, and shared targets (#37811)

Centralize session target resolution for mini and noninteractive
run paths. Recover from transport drops, replace questions with
forms, and keep tool/catalog state location-scoped with live
progress and theme discovery.

packages/tui/src/theme/discovery.ts

@@ -0,0 +1,30 @@
+import { readdir, readFile } from "node:fs/promises"
+import path from "node:path"
+
+export function themeDirectories(config: string, cwd: string) {
+  const directories: string[] = []
+  for (let current = cwd; ; current = path.dirname(current)) {
+    directories.push(path.join(current, ".opencode"))
+    if (path.dirname(current) === current) break
+  }
+  return [config, ...directories.reverse()]
+}
+
+export async function discoverThemes(directories: string[]) {
+  const result: Record<string, unknown> = {}
+  for (const directory of directories) {
+    const themeDirectory = path.join(directory, "themes")
+    const entries = await readdir(themeDirectory, { withFileTypes: true }).catch((error: unknown) => {
+      if (error && typeof error === "object" && Reflect.get(error, "code") === "ENOENT") return []
+      return Promise.reject(error)
+    })
+    const files = entries
+      .filter((entry) => (entry.isFile() || entry.isSymbolicLink()) && path.extname(entry.name) === ".json")
+      .map((entry) => path.join(themeDirectory, entry.name))
+      .sort()
+    for (const file of files) {
+      result[path.basename(file, ".json")] = JSON.parse(await readFile(file, "utf8")) as unknown
+    }
+  }
+  return result
+}