Migrate ts-rs to but-ts (schemars) for SDK type generation

Replace ts-rs (export-ts) with schemars-based but-ts for all SDK types,
and introduce where missing, removing hand-written TypeScript duplicates
and wiring everything through @gitbutler/but-sdk.

Types migrated to export-schema / register_sdk_type!:
- gitbutler-branch-actions: BranchListingFilter, BranchListing, Author,
  StackReference, BranchListingDetails, StackOrder, SeriesOrder, and all
  upstream integration types (NameAndStatus, StackStatus, Resolution,
  etc.)
- gitbutler-edit-mode: ConflictEntryPresence (new export-schema feature)
- but-api/legacy/modes: HeadAndMode, HeadSha
- but-workspace: StackDetails (added missing register_sdk_type! call)

Infrastructure:
- Add export-schema feature to gitbutler-branch-actions and
  gitbutler-edit-mode with conditional schemars guards
- Propagate gitbutler-branch/export-schema through but-api export-schema
- Add --source-crates filter to but-ts to avoid false name-collision
  errors
- Fix but-ts to emit T | null (not T | null | undefined) for nullable
  fields, since no SDK types use skip_serializing_if
- Remove duplicate author.rs from gitbutler-branch-actions
- Fix broken TypeScript imports across ~40 desktop app files to import
  directly from declaration sites (no re-exports)

Author: mtsgrd

.github/workflows/push.yaml

@@ -91,27 +91,6 @@ jobs:
       - uses: ./.github/actions/init-env-node
       - run: pnpm prettier
 
-  generate-ts-definitions:
-    needs: changes
-    if: ${{ needs.changes.outputs.node == 'true' || needs.changes.outputs.rust == 'true' }}
-    runs-on: ubuntu-latest
-    env:
-      CARGO_TERM_COLOR: always
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-        with:
-          persist-credentials: false
-      - name: Rust Cache
-        uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # v2.9.1
-        with:
-          shared-key: ts-def-gen
-          save-if: ${{ github.ref == 'refs/heads/master' }}
-      # Node is needed for the formatting of typescript files.
-      - uses: ./.github/actions/init-env-node
-      - name: Dependencies for 'keyring'
-        run: sudo ./scripts/install-minimal-debian-dependencies.sh
-      - run: ./scripts/generate-ts-definitions-from-rust.sh
-
   lint-node:
     needs: changes
     if: ${{ needs.changes.outputs.node == 'true' }}

Cargo.lock

@@ -216,7 +216,7 @@ gix = { version = "0.81.0", git = "https://github.com/GitoxideLabs/gitoxide", re
 ] }
 gix-testtools = { version = "0.19.0", git = "https://github.com/GitoxideLabs/gitoxide", rev = "50fb46f17acba7d75d4ed6795b7b9cef484e34c6" }
 
-ts-rs = { version = "11.1.0", features = ["serde-compat", "no-serde-warnings"] }
+
 insta = { version = "1.45.1", features = ["json"] }
 git2 = { version = "0.20.4", features = [
     "vendored-openssl",

Cargo.toml

@@ -20,6 +20,7 @@
 	},
 	"devDependencies": {
 		"@anthropic-ai/sdk": "^0.80.0",
+		"@gitbutler/but-sdk": "workspace:*",
 		"@gitbutler/core": "workspace:*",
 		"@gitbutler/design-core": "2.2.1",
 		"@gitbutler/shared": "workspace:*",

apps/desktop/package.json

@@ -1,6 +1,6 @@
 <script lang="ts">
 	import { getBranchStatusLabelAndColor } from "$components/lib";
-	import type { PushStatus } from "$lib/stacks/stack";
+	import type { PushStatus } from "@gitbutler/but-sdk";
 
 	type Props = {
 		pushStatus: PushStatus;

apps/desktop/src/components/branch/BranchBadge.svelte

@@ -22,7 +22,7 @@
 	import { isDefined } from "@gitbutler/ui/utils/typeguards";
 	import type { BranchIconName } from "$lib/branches/branchIcon";
 	import type { DropzoneHandler } from "$lib/dragging/handler";
-	import type { PushStatus } from "$lib/stacks/stack";
+	import type { PushStatus } from "@gitbutler/but-sdk";
 	import type { Snippet } from "svelte";
 
 	interface BranchCardProps {

apps/desktop/src/components/branch/BranchCard.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 	import BranchBadge from "$components/branch/BranchBadge.svelte";
-	import { type BranchDetails } from "$lib/stacks/stack";
 	import { AvatarGroup, Button } from "@gitbutler/ui";
+	import type { BranchDetails } from "@gitbutler/but-sdk";
 	import type { Snippet } from "svelte";
 
 	type Props = {

apps/desktop/src/components/branch/BranchDetails.svelte

@@ -19,7 +19,7 @@
 	import { DRAG_STATE_SERVICE } from "@gitbutler/ui/drag/dragStateService.svelte";
 	import { focusable } from "@gitbutler/ui/focus/focusable";
 	import { slide } from "svelte/transition";
-	import type { PushStatus } from "$lib/stacks/stack";
+	import type { PushStatus } from "@gitbutler/but-sdk";
 	import type { Snippet } from "svelte";
 	import type { ComponentProps } from "svelte";
 

apps/desktop/src/components/branch/BranchHeader.svelte

@@ -32,7 +32,8 @@
 	} from "@gitbutler/ui";
 
 	import { tick } from "svelte";
-	import type { AnchorPosition, BranchDetails } from "$lib/stacks/stack";
+	import type { AnchorPosition } from "$lib/stacks/stack";
+	import type { BranchDetails } from "@gitbutler/but-sdk";
 
 	type Props = {
 		projectId: string;

apps/desktop/src/components/branch/BranchHeaderContextMenu.svelte

@@ -2,13 +2,7 @@
 	import CommitTimelineNode from "$components/commit/CommitTimelineNode.svelte";
 	import ReduxResult from "$components/shared/ReduxResult.svelte";
 	import { CLIPBOARD_SERVICE } from "$lib/backend/clipboard";
-	import {
-		commitCreatedAtDate,
-		extractUpstreamCommitId,
-		isCommit,
-		type Commit,
-		type UpstreamCommit,
-	} from "$lib/branches/v3";
+	import { commitCreatedAtDate, extractUpstreamCommitId, isCommit } from "$lib/branches/v3";
 	import { STACK_SERVICE } from "$lib/stacks/stackService.svelte";
 	import {
 		canShiftStepDown,
@@ -26,6 +20,7 @@
 	import { Modal, ModalFooter, Button, ScrollableContainer, SimpleCommitRow } from "@gitbutler/ui";
 	import { flip } from "svelte/animate";
 	import type { InteractiveIntegrationStep } from "$lib/stacks/stack";
+	import type { Commit, UpstreamCommit } from "@gitbutler/but-sdk";
 
 	type Props = {
 		modalRef: Modal | undefined;