docs(changelog): rewrite the last thirty releases for readers

Releases 1.13.1 through 1.22.1 are regrouped by what each change is
(New, Improvements, Fixes, Misc) and reworded in the voice the
changelog-authoring skill asks for: one or two plain sentences per
bullet, the symptom or the capability named, no mechanism. Packed
bullets were split, every fact and every contributor credit kept.
Older releases keep the mechanical grouping.

Claude-Session: https://claude.ai/code/session_01VqV56Hez25hTxXH4ipJfzH

changelog/1.18.1.md

@@ -6,29 +6,33 @@ date: 2026-08-04
 ## App
 
 ### New
-- Chat: Ctrl/Cmd+L now adds the selected text to the chat input, or focuses it when nothing is selected; the toggle-sidebar shortcut moved to Ctrl/Cmd+Alt+L.
+- **Sessions:** an archived session can be restored to the active list, from the sidebar context menu, the archived-sessions page or the bulk-selection bar. Permanent deletion is no longer the only option (thanks to @makeittech).
+- Chat: Ctrl/Cmd+L adds the selected text to the chat input, or focuses the input when nothing is selected. The toggle-sidebar shortcut moved to Ctrl/Cmd+Alt+L.
 
 ### Improvements
-- **Providers:** signing in to an OAuth-only provider now actually completes — the browser login is stored and the provider list updates instead of remaining signed out. OAuth-only providers show a Connect flow instead of an API key form, and their models stay hidden until you are signed in.
-- Providers: sign-ins that need extra details (such as GitHub Copilot Enterprise) now ask for them before opening the browser, and device codes come with a working copy button.
-- Chat: a manually chosen model now stays selected after a delegated subtask finishes, instead of reverting to the agent's default model.
+- Providers: an OAuth-only provider shows a Connect flow in place of the API key form, and its models appear once you are signed in.
+- Providers: a sign-in that needs extra details, such as GitHub Copilot Enterprise, asks for them before it opens the browser.
 
 ### Fixes
-- **Sessions:** archived sessions can now be restored to the active list — from the sidebar context menu, the archived-sessions page, or the bulk-selection bar — instead of only offering permanent deletion (thanks to @makeittech).
-- Walkthrough: models without a working provider login no longer appear in the walkthrough picker, and Generate stays disabled until a usable model is selected instead of failing with a raw provider error.
-- Walkthrough: connecting to a server older than the app now says the server needs updating instead of showing a raw HTML parsing error, and the "Critical" tag is now "Key change" with a tooltip so it no longer reads as a problem found in your code.
-- Agents/CLI: sending a prompt that never reaches its session is now reported as failed, and an unavailable model, agent, or variant is rejected with a clear error before anything is created.
+- **Providers:** signing in to an OAuth-only provider completes. The browser login is stored and the provider list updates, so you are no longer left signed out.
+- Providers: the copy button for device codes works.
+- Chat: a model you chose by hand stays selected after a delegated subtask finishes; it no longer reverts to the agent's default model.
+- Walkthrough: models without a working provider login are gone from the walkthrough picker, and Generate stays disabled until you pick a usable model, so it no longer fails with a raw provider error.
+- Walkthrough: connecting to a server older than the app says the server needs updating instead of showing a raw HTML parsing error. The "Critical" tag is now "Key change" with a tooltip, so it no longer reads as a problem found in your code.
+- Agents/CLI: a prompt that never reaches its session is reported as failed, and an unavailable model, agent or variant is rejected with a clear error before anything is created.
 - Desktop/Linux: "Open in Terminal" no longer launches a non-terminal app that is set as the terminal launcher (thanks to @kydorn).
 
 ## VS Code
 
 ### New
-- Chat: Ctrl/Cmd+L now adds the selected text to the chat input, or focuses it when nothing is selected.
+- **Sessions:** an archived session can be restored to the active list, from the sidebar context menu, the archived-sessions page or the bulk-selection bar (thanks to @makeittech).
+- Chat: Ctrl/Cmd+L adds the selected text to the chat input, or focuses the input when nothing is selected.
 
 ### Improvements
-- **Providers:** signing in to an OAuth-only provider (such as Cursor) now completes in the browser — the login is stored and the provider updates instead of remaining signed out. OAuth-only providers show a Connect flow instead of an API key form, and their models stay hidden until you are signed in.
-- Providers: sign-ins that need extra details (such as GitHub Copilot Enterprise) now ask for them before opening the browser, and device codes come with a working copy button.
-- Chat: a manually chosen model now stays selected after a delegated subtask finishes, instead of reverting to the agent's default model.
+- Providers: an OAuth-only provider shows a Connect flow in place of the API key form, and its models appear once you are signed in.
+- Providers: a sign-in that needs extra details, such as GitHub Copilot Enterprise, asks for them before it opens the browser.
 
 ### Fixes
-- **Sessions:** archived sessions can now be restored to the active list — from the sidebar context menu, the archived-sessions page, or the bulk-selection bar (thanks to @makeittech).
+- **Providers:** signing in to an OAuth-only provider, such as Cursor, completes in the browser. The login is stored and the provider updates, so you are no longer left signed out.
+- Providers: the copy button for device codes works.
+- Chat: a model you chose by hand stays selected after a delegated subtask finishes; it no longer reverts to the agent's default model.