Revert "Add missing admin action files and navigation links"

This reverts commit 41be6835bf.

README.md

@@ -8,12 +8,12 @@ Features full public-facing website, administrative panel, NextAuth authenticati
 
 ## Requirements
 
-| Component       | Version                            |
-| --------------- | ---------------------------------- |
-| Node.js         | >= 22                              |
-| pnpm            | >= 10.33.4                         |
-| MySQL / MariaDB | 8.0+ / 10.6+                       |
-| Redis           | Optional (caching / rate limiting) |
+| Component | Version |
+|---|---|
+| Node.js | >= 22 |
+| pnpm | >= 10.33.4 |
+| MySQL / MariaDB | 8.0+ / 10.6+ |
+| Redis | Optional (caching / rate limiting) |
 
 ---
 
@@ -240,7 +240,6 @@ pnpm jobs:worker
 ```
 
 Scheduled tasks:
-
 - **Daily at 03:00** — Emulator JAR backup (when `EMULATOR_JAR_PATH` and `EMULATOR_BACKUP_DIR` are configured)
 - **Daily at 04:00** — Cleanup of login logs older than 30 days and expired password reset tokens older than 7 days
 
@@ -289,11 +288,11 @@ Supports Cloudflare Turnstile and Google reCAPTCHA. Configure via **Admin → CM
 
 ## Database Architecture
 
-| Component                                         | Type                    | Migrations                          |
-| ------------------------------------------------- | ----------------------- | ----------------------------------- |
-| Emulator tables (`users`, `items`, `rooms`, etc.) | Existing Polaris schema | None — read-only for CMS            |
-| CMS tables (`website_*`, `radio_*`, etc.)         | CMS-owned               | `prisma/migrations/*.sql` (9 files) |
-| Migration tracking                                | `cms_migrations` table  | Auto-created                        |
+| Component | Type | Migrations |
+|---|---|---|
+| Emulator tables (`users`, `items`, `rooms`, etc.) | Existing Polaris schema | None — read-only for CMS |
+| CMS tables (`website_*`, `radio_*`, etc.) | CMS-owned | `prisma/migrations/*.sql` (9 files) |
+| Migration tracking | `cms_migrations` table | Auto-created |
 
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