A side menu, categories, and a store switcher

Everything that is not a title moved out of the bar into a menu on the left that
folds away with the button in the bar; the state is remembered between runs. It
carries the stores on this machine, the two actions, the categories and the
language.

Categories narrow the grid one at a time, with counts: the state of a title on
this machine, then a row per platform and per kind. The axes are built from what
the catalog contains — a WarpEngine catalog has no genre — and a category that
disappears under you falls back to Everything rather than leaving a blank grid.

With more than one store installed, clicking another in the menu opens it: the
grid, the categories and the folders follow, the choice is remembered, and stores
sharing an id are told apart by their folder. app:state now reports every store,
store:use switches, and the engine is re-checked per store because two stores can
be at different versions.

While the CLI runs, the menu, the log drawer and the filters stay live; only what
would start a second call is disabled.

Fixes the grid, which was broken and passing every check: its implicit rows split
the window's height evenly instead of following their content, so every card came
out 94px tall with its box art collapsed to nothing and its buttons clipped away.
The DOM was intact throughout — ten cards, twenty buttons — which is exactly why
the counts said nothing. Rows are content-sized now, and the art is one band of
one height, with the title's first letter where the catalog has no image.

So the window is looked at and not only counted, `SELFTEST_SHOT` has it
photograph itself; the terminal has no screen-recording permission here. The
selftest also clicks the store that is not open when there are two, and checks
that the bar, the grid and the categories follow.

Also fixes scripts/release.sh, which could not upload a package whose name has a
space in it — "WarpEngine Store-1.1.0-arm64.dmg" does — because the list was one
string split on whitespace. And `make release` cleans dist/ first, so a release
cannot pick up the previous version's artifacts.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

README.md

@@ -95,15 +95,44 @@ panel — and not a release of this app.
 
 ## Use
 
-- **Install all** fetches everything the catalog offers for this machine.
-- A card's button is **Install**, **Update**, or **Play** / **Open** once it is
-  there. **Remove** takes a title back out.
-- Each card says whether it is **native** — unpacked and run locally, works
-  offline — or **hosted**: a browser build the catalog serves rather than
-  packages, so its entry opens a page and needs the network.
-- The **Log** drawer at the bottom carries the store's own output verbatim, and
-  next to it are buttons that open the two folders everything lands in.
-- The language follows the system and can be switched; **English and Hungarian**.
+Everything that is not a title lives in the **side menu** on the left, and the
+`☰` button in the bar folds it away — the state is remembered between runs.
+
+- **Stores** lists every store on this machine, the open one marked. Clicking
+  another switches to it: the grid, the categories and the folders all follow, and
+  the client reopens on that store next time. Two stores installed from the same
+  catalog into different folders show their folder instead of their id, because
+  the id would not tell them apart. **Add a store…** brings up the registry
+  picker, the same one the first run offers.
+- **Actions** holds **Install all**, which fetches everything the catalog offers
+  for this machine, and **Refresh**, which re-reads the catalog.
+- **Categories** narrows the grid, one category at a time, with the count next to
+  each: *Everything*, *Installed*, *Updates*, *Not installed*, then a row per
+  **platform** (`godot`, `tic80`, `love`, …) and per **kind** (native or hosted).
+  The axes are built from what the catalog actually contains — a platform with no
+  titles is not listed, and a category that disappears under you falls back to
+  *Everything* rather than leaving an empty grid. There is no genre in a
+  WarpEngine catalog, so these are the categories there are.
+- **Language** follows the system and can be switched; **English and Hungarian**.
+
+In the grid, a card's button is **Install**, **Update**, or **Play** / **Open**
+once it is there. **Remove** takes a title back out. Each card says whether it is
+**native** — unpacked and run locally, works offline — or **hosted**: a browser
+build the catalog serves rather than packages, so its entry opens a page and needs
+the network.
+
+The **Log** drawer at the bottom carries the store's own output verbatim, and next
+to it are buttons that open the two folders everything lands in.
+
+Every card carries a band of box art the same height — the first letter of the
+title when the catalog has no image — so titles and buttons line up across a row.
+Until this was photographed, the grid was quietly broken: the rows split the
+window's height evenly instead of following their content, which collapsed the art
+to nothing and clipped the buttons out of sight.
+
+While the store is working, only the things that would start a second call are
+disabled: the menu, the log drawer and the category filters keep working, because
+they change what is on screen and nothing on disk.
 
 Anything installed from the window is a normal menu entry, so it also shows up in
 your launcher, Dock or Start menu — the app does not have to be running to play.
@@ -119,6 +148,7 @@ names. `make` on its own lists everything.
 | `make start` | run the app against whatever store is installed |
 | `make smoke` | drive the store bridge with no window at all |
 | `make uitest` | load the window once and report what rendered |
+| `SELFTEST_SHOT=shot.png npm run uitest` | the same, and the window photographs itself into that file |
 | `make test` | both checks |
 | `make dist` | package for this machine (`dist-mac`, `dist-win`, `dist-linux` to pick) |
 | `make publish` | upload the packages already in `dist/` to the Gitea release |
@@ -203,6 +233,17 @@ renders the installed state, and `npm run uitest` passes with the grid rendered
 and both languages in the picker. The bootstrap download was run into an empty
 directory and the resulting store answered the bridge.
 
+The grid was checked by looking at it, not only by counting nodes: `SELFTEST_SHOT`
+has the window capture itself, which is how the collapsed rows were found — the DOM
+had ten cards and twenty buttons all along, and every count passed while the page
+showed neither art nor buttons. A screenshot from outside the app is not available
+here, so the window takes its own.
+
+The side menu was measured with two stores in one root — a sandbox copy alongside
+the real install — and `npm run uitest` clicks the store that is not open and
+checks that the bar, the grid and the categories follow. With a single store the
+switch is skipped, which is what the normal run reports.
+
 The registry path was exercised against a local endpoint serving the same payload
 the site returns, with two records: one store whose repository has a `config.json`
 and one without. Both installed, and the engine listed all ten titles with the