Reapply "Add missing admin action files and navigation links"

This reverts commit 4d515bc400.

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) |
 
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@@ -240,6 +240,7 @@ 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
 
@@ -288,11 +289,11 @@ 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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