Merge remote-tracking branch 'origin/master' into gitea/feature/end

Resolved conflicts taking origin/master (v0.5.55) as canonical, with local
features re-applied:
- runtime log level (LOG_LEVEL env + dashboard Settings → Logging, applied
  immediately and persisted across restarts)
- free/noAuth provider enable/disable toggle via providerStrategies.enabled
- parallel model testing (Test All Models / Test Selected Keys)

open-sse/providers/registry/github.js

@@ -18,6 +18,7 @@ export default {
   transport: {
     baseUrl: "https://api.githubcopilot.com/chat/completions",
     responsesUrl: "https://api.githubcopilot.com/responses",
+    messagesUrl: "https://api.githubcopilot.com/v1/messages",
     headers: {
       "copilot-integration-id": "vscode-chat",
       "editor-version": "vscode/1.110.0",
@@ -46,6 +47,14 @@ export default {
     { id: "gpt-5.3-codex", name: "GPT-5.3 Codex" },
     { id: "gpt-5.4", name: "GPT-5.4" },
     { id: "gpt-5.4-mini", name: "GPT-5.4 Mini" },
+    // Note: routing to Copilot's Anthropic-native /v1/messages shim (see
+    // executors/github.js) is decided by model-NAME pattern at request time, not by
+    // a static targetFormat field here — Copilot's live model catalog (see
+    // services/copilotModels.js) regularly exposes claude-* models this static list
+    // hasn't caught up with yet (e.g. claude-opus-4.8), and a static per-entry
+    // targetFormat would silently miss those while also double-translating requests
+    // for models that ARE listed here (chatCore.js would pre-translate to Claude
+    // shape, then the executor would translate again). Keep these as plain entries.
     { id: "claude-haiku-4.5", name: "Claude Haiku 4.5" },
     { id: "claude-opus-4.5", name: "Claude Opus 4.5" },
     { id: "claude-sonnet-4.5", name: "Claude Sonnet 4.5" },