docs: clarify mobile and companion app availability status

Add clear availability notices to platform documentation to reduce user
confusion about app distribution:

- Android: Add notice that pre-built binaries are not yet publicly available
- iOS: Update notice to match Android format and clarify build-from-source option
- Platform index: Add structured breakdown of companion app availability

Changes address user confusion reported in Discord about missing download
links and unavailable pre-built binaries. Users can still build from source
or request early access via Discord.

Fixes #1864

Co-Authored-By: Warp <agent@warp.dev>

docs/platforms/android.md

@@ -8,6 +8,8 @@ read_when:
 
 # Android App (Node)
 
+> **Note:** The Android app is currently in development and not yet publicly available. Pre-built binaries are not distributed at this time. If you're interested in building from source or participating in early testing, please reach out via [Discord](https://discord.gg/clawd).
+
 ## Support snapshot
 - Role: companion node app (Android does not host the Gateway).
 - Gateway required: yes (run it on macOS, Linux, or Windows via WSL2).

docs/platforms/index.md

@@ -9,9 +9,12 @@ read_when:
 Clawdbot core is written in TypeScript. **Node is the recommended runtime**.
 Bun is not recommended for the Gateway (WhatsApp/Telegram bugs).
 
-Companion apps exist for macOS (menu bar app) and mobile nodes (iOS/Android). Windows and
-Linux companion apps are planned, but the Gateway is fully supported today.
-Native companion apps for Windows are also planned; the Gateway is recommended via WSL2.
+**Companion apps:**
+- **macOS menu bar app:** Available for development builds (build from source)
+- **iOS/Android apps:** Currently in internal preview; not publicly distributed
+- **Windows/Linux companion apps:** Planned
+
+The Gateway itself is fully supported on macOS, Linux, and Windows (via WSL2) today. You can use Clawdbot's full feature set via the CLI and web interface without needing the companion apps.
 
 ## Choose your OS
 

docs/platforms/ios.md

@@ -7,7 +7,7 @@ read_when:
 ---
 # iOS App (Node)
 
-Availability: internal preview. The iOS app is not publicly distributed yet.
+> **Note:** The iOS app is currently in internal preview and not yet publicly available. Pre-built binaries are not distributed at this time. If you're interested in building from source or participating in early testing, please reach out via [Discord](https://discord.gg/clawd).
 
 ## What it does