2026.10.21: set specs, prices and aliases from the model table

[fylorn]

Problem

In Edit upstream → Models, a model with an unknown context window shows "—" and one without a price shows "Unpriced", but neither cell does anything. Specs and aliases were only reachable from buttons that appear when hovering a row in the list's model popover, and prices from the Billing section, so the settings looked missing (see #335).

Change

The places that show the problem become entry points. They open the existing dialogs (Model specs, price sheet, new alias), so price sheets and aliases keep their current rules; no new dialogs, config fields or core changes.

Models section (when editing an upstream that is already in the config)

• Context window cell → Model specs. Unknown reads "Unknown · Set"; a value set by hand is shown in full colour with a tooltip.
• Price cell → price sheet dialog. Unpriced reads "Unpriced · Set price".
• Row menu, from the always-visible ⋯ and from right-click (same items): Specs…, Set price…, Add alias…, plus Remove for models added by hand (replacing the separate Remove column).
• Aliases that list a model are marked after its name.
• Unchecked models can be set up as well.
• The unpriced note gets a Set price button; a grey line says how many enabled models have an unknown context window and that clients taken over use their own default.

Set price follows Billing's existing path: a custom sheet opens in edit mode with the model added as an override; on the default sheet a new sheet is created. Two prefills are new: the sheet name defaults to the upstream's name (when free) and the upstream is preselected under "Upstreams using this price sheet". The upstream therefore switches to the new sheet when it is created, and the next Set price edits that sheet instead of creating another.

ModelSpecDialog and AliasDialog now pass the written config version to onSaved, so the edit dialog keeps saving against the latest version (as it already does for the nested price sheet and proxy dialogs).

Upstream list

• The Models cell shows a dropdown arrow (up while open).
• The model popover (26rem → 30rem) has an always-visible ⋯ per row with the same menu, marks unpriced models and unknown context windows in the row, and its footer link reads "Manage models…". Right-clicks inside the popover no longer bubble to the upstream row's own context menu.

Verification

• pnpm typecheck, pnpm vitest run (1211 tests pass), with new cases for unknownContext, catalogOf rows and sheetPrefill.
• Full-app preview harness: Set price on an upstream using the default sheet creates a sheet named after it with the upstream selected; the row then shows that sheet, and a second Set price opens it in edit mode with the model added. Setting a context window and creating an alias from the Models section update the row (value, alias mark, note count); saving the upstream afterwards succeeds without a version conflict. Right-click in the popover opens only the model's menu. No console errors.

Release

Also bumps the version to 2026.10.21 (package.json, tauri.conf.json, Cargo.toml, Cargo.lock) and adds release-notes/2026.10.21.md, covering this change and #334. Core stays at v0.74.0.

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