feat: add git workflow backend operations

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/shared/contracts/channels.ts

@@ -6,6 +6,8 @@ export const ipcChannels = {
   removeProject: 'workspace:remove-project',
   resolveWorkspaceDiscoveredTooling: 'workspace:resolve-discovered-tooling',
   refreshProjectGitContext: 'projects:refresh-git-context',
+  getProjectGitDetails: 'projects:get-git-details',
+  getProjectGitFilePreview: 'projects:get-git-file-preview',
   rescanProjectConfigs: 'project:rescan-configs',
   rescanProjectCustomization: 'project:rescan-customization',
   resolveProjectDiscoveredTooling: 'project:resolve-discovered-tooling',
@@ -50,8 +52,19 @@ export const ipcChannels = {
   dismissSessionPlanReview: 'sessions:dismiss-plan-review',
   dismissSessionMcpAuth: 'sessions:dismiss-mcp-auth',
   startSessionMcpAuth: 'sessions:start-mcp-auth',
+  discardSessionRunGitChanges: 'sessions:discard-run-git-changes',
+  suggestProjectGitCommitMessage: 'sessions:suggest-git-commit-message',
   querySessions: 'sessions:query',
   updateSessionModelConfig: 'sessions:update-model-config',
+  stageProjectGitFiles: 'git:stage-files',
+  unstageProjectGitFiles: 'git:unstage-files',
+  commitProjectGitChanges: 'git:commit',
+  pushProjectGit: 'git:push',
+  fetchProjectGit: 'git:fetch',
+  pullProjectGit: 'git:pull',
+  createProjectGitBranch: 'git:create-branch',
+  switchProjectGitBranch: 'git:switch-branch',
+  deleteProjectGitBranch: 'git:delete-branch',
   selectProject: 'selection:project',
   selectPattern: 'selection:pattern',
   selectSession: 'selection:session',