[httpsphl]

What

The browser panel showed the bot's page at a fixed 1280 x 800, so a tall panel had the page small at the top and a large empty area below it. Now the page takes the shape of the room the panel has.

• Daemon. New browser.resize {botId, width, height}: the room the watching connection's panel has for the page. The page keeps its 1280 of width, so sites keep their desktop layout (a narrow panel shrinks the picture, not the page), and takes the height that gives it the room's shape, between 600 and 2000. It applies to every tab, also to a browser that opens later, and the page goes back to 1280 x 800 when the last connection watching stops. Frames, the bounds of the owner's points and the bot's browser_scroll follow the size the page has now.
• App. The panel measures itself under the address row, sets aside the place of the line about what the bot did and of the button to take over, and asks for that shape 300 ms after it stops changing. The picture is shown as large as fits, in the page's shape (CSS container units, no second measurement). Notices that come and go (the request for a hand, the bar that says you are in control) do not count, so they never resize the page under the bot or under the owner's mouse: the picture only gets a little smaller.
• Spec 21.3, 21.7, 21.8, 21.10 and 21.11 (N3.1), and section 19 records what Edge 154 does when the size changes with a page open.

Decisions

• The height follows the panel, the width does not. Following the width would hand the bot a phone layout every time the panel is narrow.
• Only while someone watches. A bot working alone always gets the same 1280 x 800.
• One size per browser, the last request wins.

Tests

• crates/botloftd/tests/browser_panel.rs, with the real Edge: a size asked before the browser opens, a change with a page open (the page's innerHeight and the frames follow), the owner's points on the taller page, and back to 800 after browser.unwatch.
• Unit tests for the shape rule and for the points.
• browser.test.tsx with FakeBotloft: the panel asks for the right room, the bot's cursor lands right on a taller page, and closing the panel gives the page its own size back.
• cargo fmt, clippy -D warnings, cargo test --workspace and pnpm check pass.
• Seen in the dev preview (pnpm dev): the page fills a tall panel, follows the window's size, and keeps its size when taking control.

Still to see with real Claude Code

• With a bot browsing a real site and the panel tall: the page fills the panel, and browser_screenshot gives the bot the taller picture without trouble (ask it to describe the bottom of the page).