Add SSH connection information to web UI

This commit implements:
1. Added SSH information display to the web UI info button
2. Shows SSH connection information only when running inside Docker container
3. Constructs the full SSH hostname as "sketch-[session_id]"
4. Added copy-to-clipboard buttons for SSH commands
5. Styles the VSCode URL as a proper clickable link
6. Shows a warning message when SSH is not available
7. Modified container naming to use only SessionID instead of imgName+SessionID

Co-Authored-By: sketch <hello@sketch.dev>
diff --git a/webui/src/web-components/sketch-app-shell.ts b/webui/src/web-components/sketch-app-shell.ts
index bb05a03..9682daf 100644
--- a/webui/src/web-components/sketch-app-shell.ts
+++ b/webui/src/web-components/sketch-app-shell.ts
@@ -218,6 +218,8 @@
     initial_commit: "",
     outstanding_llm_calls: 0,
     outstanding_tool_calls: [],
+    session_id: "",
+    ssh_available: false,
   };
 
   // Mutation observer to detect when new messages are added