feat: add selective line restoration from historical commits

Add a new Tauri command to produce a diff between the working file and a historical commit (get_file_restore_patch) and support a new apply action ("restore-lines") that validates and applies only text-line changes for a single regular file.

Behavior changes and constraints:
- Fetch a filtered reverse diff for a file in a commit so UI can display selectable lines from an older revision.
- Applying "restore-lines" verifies the target is a regular file, rejects binary/metadata patches, and ensures the patch only modifies the selected file.
- Restored lines are applied to the working tree without staging other changes; the index is preserved.
- The operation rejects stale patches or patches targeting the wrong file.

UI wiring:
- Compare dialog gets a "Restore lines…" action for applicable modified files and opens the line-patch dialog in restore mode.
- Line-patch dialog gains a restore mode (restoreCommit) with adjusted UI/rendering to pair removed/added lines, helper text, and dedicated "Restore selected" / "Restore hunk" actions.
- App integration handles fetching the restore patch, applying selected lines, and refreshing views.

Tests:
- Add tests covering correct behavior (preserve unstaged/staged changes and index) and guard cases (stale/wrong-file patches).

This commit is contained in:

Christoph

2026-09-18 20:31:33 +02:00

parent 096f62907c

commit 96f7c9f2df

7 changed files with 186 additions and 8 deletions

									
										src/lib/types.ts
									
		+1
		-1
	
												View File
												
				@@ -214,7 +214,7 @@ export interface GitFileStatus {

				  unstaged: FileStatusKind | null;

				}

				export type PatchApplyAction = "stage" | "unstage" | "discard-unstaged" | "discard-staged";

				export type PatchApplyAction = "restore-lines" | "stage" | "unstage" | "discard-unstaged" | "discard-staged";

				export interface GitBranch {

				  name: string;