Add Quick Connect: open a session without saving a profile first

File > Quick Connect... and a matching Profiles-tab button open
ProfileDialog in a new quick-connect mode (Name/Tags/Folder hidden,
Name validation skipped) and hand the resulting in-memory profile
straight to a session tab -- nothing is written to the profile
database. The tab title is derived from host/username/protocol for
display only. A Quick Connect tab's context menu gets a "Save as
Profile..." action, shown only on tabs that were never saved, that
opens the normal profile dialog pre-filled to persist it afterward.

Bump version to v2026.9.28.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/PROGRESS.md

@@ -424,6 +424,23 @@ Git:
 - Release: [v2026.9.14.2](https://git.darksingularity.org/DarkSingularity/orbithub/releases/tag/v2026.9.14.2) — same-day patch fixing RDP display corruption (missing/misplaced taskbar) after resizing the session window (the client never resized its own display buffer for channel-driven RDP resizes)
 - Release: [v2026.9.15](https://git.darksingularity.org/DarkSingularity/orbithub/releases/tag/v2026.9.15) — adds Import/Export for profile lists (File menu)
 
+- Quick Connect (issue #23): a `File > Quick Connect...` action and a
+  matching button on the Profiles tab open a connection without saving a
+  profile first. Reuses `ProfileDialog` via a new `setQuickConnectMode()`
+  toggle (Name/Tags/Folder hidden, Name validation skipped) rather than a
+  second dialog class, so all protocol-specific field logic
+  (`refreshAuthFields()`) stays in one place. The tab title is derived
+  from host/username/protocol (e.g. `user@host`) purely for display --
+  never written to the database. A Quick Connect tab's right-click menu
+  gets a "Save as Profile..." action (absent on normal profile-backed
+  tabs) that opens the same dialog pre-filled to persist it afterward.
+  Detecting a Quick Connect tab needed no new state: `ProfileDialog::
+  profile()` already always returns `id = -1` for an unsaved profile,
+  and Quick Connect is the only path today that hands such a profile to
+  `SessionWindow::addSessionTab()`. GUI-only change with no automated
+  test coverage (consistent with `ProfileDialog` never having had any);
+  verified manually by running the built binary
+
 ## Milestone 10 - v1.0 Stabilization
 
 Status: Planned