feat(cli): list, read, send commands (Wave 3)

CLI gains three new sub-commands:
- dispatch list [--server] — list conversations (short ID + title + activity)
- dispatch read <id> [--server] — block until turn settles, print last AI message
- dispatch send <id> --text [--queue] [--open] [--cwd] [--effort] [--server]
  - Default: blocking (consumes NDJSON stream, prints accumulated text + conv ID)
  - --queue: non-blocking (POST /conversations/:id/queue, exit immediately)
  - --open: signals frontend to open the conversation tab (POST /conversations/:id/open)

Short-ID resolution: 4+ char prefix → GET /conversations?q= → resolve to full ID.
32+ char input is treated as a full UUID (no resolution). Errors on 0 or >1 matches.

48 new tests (108 total in cli). Pure arg parser + HTTP client functions, zero vi.mock.

1 files changed, 16 insertions, 2 deletions

diff --git a/packages/cli/src/index.ts b/packages/cli/src/index.ts
index 82e0b21..6f16547 100644
--- a/packages/cli/src/index.ts
+++ b/packages/cli/src/index.ts
@@ -6,7 +6,21 @@
 
 export { type ParsedCommand, parseArgs } from "./args.js";
 export { formatCatalog } from "./catalog.js";
-export { fetchModels, streamChat } from "./http.js";
+export {
+	type ConversationIdResolution,
+	enqueueMessage,
+	fetchConversations,
+	fetchLastMessage,
+	fetchModels,
+	openConversation,
+	resolveConversationId,
+	streamChat,
+} from "./http.js";
 export { buildChatRequest, composeMessage } from "./message.js";
 export { type SplitResult, splitNdjsonLines } from "./ndjson.js";
-export { renderEvent } from "./render.js";
+export {
+	extractLastText,
+	formatConversationList,
+	formatRelativeTime,
+	renderEvent,
+} from "./render.js";