webterm: fix screenshot tile bootstrap and add request logging

Fix screenshot generation for requested dashboard route keys by preserving non-empty route_key lookups when no session exists yet, allowing lazy session creation instead of returning 404.

Add server-side observability with HTTP request logs (method, URI, status, bytes, duration, remote address) and websocket connection lifecycle logs for connect/disconnect and unexpected read errors.

Update README title/positioning and expand feature bullets to document Ghostty WASM rendering and mobile/touch keyboard support.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

README.md

@@ -1,19 +1,23 @@
-# webterm (Go)
+# webterm
 
 ![Icon](docs/icon-256.png)
 
 `webterm` serves terminal sessions over HTTP/WebSocket, with a dashboard mode for multiple sessions and Docker-aware tiles.
 
+This repository is the Go port of the original Python implementation, which is preserved in the `python` branch.
+
 ![Screenshot](docs/screenshot.png)
 
 ## Features
 
 - Web terminal with reconnect support
+- Ghostty WebAssembly terminal engine for fast rendering
 - Session dashboard with live SVG screenshots
 - Docker watch mode (`webterm-command` / `webterm-theme` labels)
 - Docker compose manifest ingestion
 - CPU sparkline tiles for compose services
 - SSE activity updates for fast dashboard refresh
+- Mobile/touch support with virtual keyboard + draggable keybar
 - Theme/font controls for terminal rendering
 
 ## Install