fix(eltex): use the real 1M context window like ai-glm

ctx: in ai-eltex filled up too fast: the launcher capped the window at
200K (CLAUDE_CODE_AUTO_COMPACT_WINDOW from the admins' doc plus
CLAUDE_CODE_DISABLE_1M_CONTEXT), while anth-glm-5.3 is the same glm-5.3
on the Z.ai Anthropic endpoint that ai-glm runs with a 1M window.
A 598K-token request went through the proxy fine (glm-5.3 answered
correctly from the last line). Claude Code now reports contextWindow
1000000.

The 200K cap also made Z.ai's analyze_image turns dangerous: their
usage covers both internal model passes (~x2), e.g. 82.7K -> 166.7K
(83% of 200K), which could trigger an early auto-compact.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_fixes.sh

@@ -141,6 +141,17 @@ test_eltex_no_tool_search() {
   fi
 }
 
+# ── ai-eltex: окно 1M, как у ai-glm (иначе ctx: завышен в ~5 раз) ─────────
+test_eltex_context_window() {
+  if echo "$ELTEX_SECTION" | grep -q '^CLAUDE_CODE_MAX_CONTEXT_TOKENS=1000000' \
+     && ! echo "$ELTEX_SECTION" | grep -q '^CLAUDE_CODE_DISABLE_1M_CONTEXT=' \
+     && ! echo "$ELTEX_SECTION" | grep -q '^CLAUDE_CODE_AUTO_COMPACT_WINDOW='; then
+    ok "ai-eltex: 1M context window, no 200K compact window / DISABLE_1M"
+  else
+    fail "ai-eltex: must set CLAUDE_CODE_MAX_CONTEXT_TOKENS=1000000 without DISABLE_1M / AUTO_COMPACT_WINDOW"
+  fi
+}
+
 # ── logout hook: /logout-eltex удаляет eltex_key ──────────────────────────
 test_logout_eltex() {
   local tmp_home rc=0
@@ -367,6 +378,7 @@ test_glm_default_effort
 test_eltex_claude_launcher
 test_eltex_model_from_key
 test_eltex_no_tool_search
+test_eltex_context_window
 test_logout_eltex
 test_gemini_native_launcher
 test_cursor_native_launcher