feat: Hermit 1.1.0 — HERMIT_* env, Tauri desktop shell

Wire hermit_getenv across the engine, rebrand WebUI/systemd/docs, and
add apps/desktop (Tauri 2 + React) with a DeepSeek-Harness-like UI.
Qt app/ is frozen; full libcstcore FFI is scaffolded behind --features engine.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/extensions.c

@@ -1,4 +1,5 @@
 #include "cst_ext.h"
+#include "cst_hermit_glyph.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -21,7 +22,7 @@ void cst_extensions_wait(FILE *log) {
   if (total == 0)
     return;
   /* Default 8s (was 30s); override with CST_MCP_WAIT_MS. */
-  const char *e = getenv("CST_MCP_WAIT_MS");
+  const char *e = hermit_getenv("MCP_WAIT_MS");
   int ms = e && atoi(e) >= 0 ? atoi(e) : 8000;
   if (ms > 60000)
     ms = 60000;