docs(changelog): 2026-08-06/07 follow-up batch entries (#238)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

changelog/unreleased/2026-08-06-web-app.md

@@ -1,4 +1,4 @@
-# Web App: directory browsing de-raced, Project defaults reach new drafts, update dot explained, focused model catalog, "temporary workspace" unified
+# Web App: directory browsing de-raced, Project defaults reach new drafts, update dot explained, focused model catalog, protocol hints, "temporary workspace" unified
 
 ## Directory browsing no longer mis-navigates under repeated clicks
 
@@ -14,7 +14,11 @@ The sidebar avatar's update indicator now names the available release in a hover
 
 ## Model catalog opens focused on DeepSeek
 
-The models page now expands only the DeepSeek group by default; other vendor groups and user-defined groups start collapsed. While a search query is active, any group holding matches is force-opened (derived, not persisted) so results can never hide inside a collapsed group; expansion state still resets per visit.
+The models page now expands only the DeepSeek group by default; other vendor groups and user-defined groups start collapsed. While a search query is active, any group holding matches is force-opened (derived, not persisted) so results can never hide inside a collapsed group. The user's own expand/collapse toggles persist per Project (localStorage, same pattern as the sidebar's group collapse) and are restored on the next visit; with nothing stored, the DeepSeek-only default applies.
+
+## Model dialog explains protocols instead of warning about them
+
+The model config dialog's base URL field now carries an in-field grey suffix showing the exact path the client appends to the base URL — `/chat/completions` for OpenAI-compatible entries (gateways, custom groups, DeepSeek/Z.AI/Moonshot/Qwen), `/responses` for OpenAI direct, `/v1/messages` for Anthropic, `/v1beta/models` for Gemini (each verified against the actual SDK request paths) — replacing the wordy "this model speaks the vendor's official protocol" warning. Preset direct-vendor groups' mechanism hints (AgentHub auto-routing, env-var fallback) are unified into one user-facing line: "Only <vendor>'s official API protocol is supported; use a custom model group for OpenAI-compatible endpoints."
 
 ## "Temporary workspace" unified