Implement shell completions for CLI (Workstream N-Completions)

Add `reviq completions bash/zsh` command with dynamic shell completions:

- Create bash-complete.ts entry point using stricli's proposeCompletions API
- Add completions command with bash and zsh support (fish planned)
- Extract app export to separate app.ts for shared imports
- Add @stricli/auto-complete dependency and __reviq_bash_complete bin entry

Also fix lint/type errors in api-server tests and helpers.

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

apps/cli/src/routes/_command.ts

@@ -1,6 +1,7 @@
 import { buildRouteMap } from "@stricli/core";
 import { authRouteMap } from "./auth/_command.js";
 import { bootstrapCommand } from "./bootstrap.js";
+import { completionsCommand } from "./completions.js";
 import { orgRouteMap } from "./org/_command.js";
 import { userRouteMap } from "./user/_command.js";
 
@@ -10,6 +11,7 @@ export const rootRouteMap = buildRouteMap({
     auth: authRouteMap,
     user: userRouteMap,
     org: orgRouteMap,
+    completions: completionsCommand,
   },
   docs: {
     brief: "RevIQ CLI for database and user management",