feat(git-graph): VS Code-style git graph with commit actions in History modal (#1431)

* feat(types): add parents to GitLogEntry and new commit action types

* feat(git): add parent hashes and --all flag to getLog

* fix(git): move record separator to start of log format string

* feat(git): add checkoutCommit server function and route

* feat(git): add cherryPick server function and route

* feat(git): add revertCommit server function and route

* feat(git): add resetToCommit server function and route

* fix(tests): make git service tests branch-name portable, add error path tests

* feat(client): add checkoutCommit, cherryPick, revertCommit, resetToCommit API wrappers

* feat(git-graph): add lane assignment algorithm with tests

* feat(git-graph): add GitGraphSegment per-row SVG renderer

* feat(i18n): add locale strings for git graph action buttons

* fix(git-graph): handle lane convergence, fix SVG path coords, add connector tests

* feat(git-graph): add ref badges and action buttons to HistoryCommitRow

* fix(git-graph): add loading guards to reset actions, use theme tokens for ref badges

* fix(git-graph): conditional hooks, stale graph log, conflict handling, i18n

* fix(types): replace toBeDefined with toBeTruthy, fix toast API usage

* fix(lint): remove unused variables

* fix(git-graph): fix SVG height causing 150px row spacing

* fix(git-graph): smooth bezier curves, fill row height, round line caps

* fix(git-graph): non-scaling-stroke fixes bezier white spaces, sort curves on top

* fix(git-graph): remove viewBox scaling, match SVG height to actual row height

* fix(git-graph): ResizeObserver tracks actual row height, eliminates SVG height mismatch

* feat(git-graph): replace SVG with Canvas for graph rendering

* fix(git-graph): isolate canvas from flex layout to prevent replaced-element height leak

* feat(git-graph): align action buttons, add confirmation popups for all actions

* fix(git-graph): address code review findings CR-001 through CR-005

- CR-001: VS Code getGitLog now forwards 'all' option and parses %P parents
- CR-002: VS Code bridge/gitService implement checkoutCommit, cherryPick,
  revertCommit, resetToCommit with conflict detection and hard-reset guard
- CR-003: server-side commit hash validated with /^[0-9a-fA-F]{7,40}$/
  in both routes.js and service.js; 12 new rejection tests added
- CR-004: cherry-pick/revert conflict path now refreshes fetchStatus/
  fetchBranches/fetchLog; conflict toast uses i18n keys in all 7 locales
- CR-005: corrected O(n) comment to O(n x lanes)

* fix(i18n): add zh-TW locale and common.language.traditionalChinese key to all locales

upstream/main added zh-TW.ts after branch diverged; CI type-check fails
when PR is merged because zh-TW.ts was missing all gitView.history.actions.*
keys and loadMore/loadingMore. Also adds common.language.traditionalChinese
to en.ts and all 6 non-English files to match upstream en.ts.

* fix: harden git history actions

* feat: split git history graph view

* chore: remove git graph planning docs

---------

Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>

packages/ui/src/lib/gitApiHttp.ts

@@ -30,6 +30,10 @@ import type {
   GitIdentitySummary,
   DiscoveredGitCredential,
   MergeConflictDetails,
+  CheckoutCommitResponse,
+  CherryPickResponse,
+  RevertCommitResponse,
+  ResetToCommitResponse,
 } from './api/types';
 
 declare global {
@@ -711,6 +715,7 @@ export async function getGitLog(
       from: options.from,
       to: options.to,
       file: options.file,
+      all: options.all ? 'true' : undefined,
     })
   );
   if (!response.ok) {
@@ -930,6 +935,72 @@ export async function merge(
   return response.json();
 }
 
+export async function checkoutCommit(
+  directory: string,
+  hash: string
+): Promise<CheckoutCommitResponse> {
+  const response = await fetch(buildUrl(`${API_BASE}/checkout-commit`, directory), {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ hash }),
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ error: response.statusText }));
+    throw new Error(error.error || 'Failed to checkout commit');
+  }
+  return response.json();
+}
+
+export async function cherryPick(
+  directory: string,
+  hash: string
+): Promise<CherryPickResponse> {
+  const response = await fetch(buildUrl(`${API_BASE}/cherry-pick`, directory), {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ hash }),
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ error: response.statusText }));
+    throw new Error(error.error || 'Failed to cherry-pick');
+  }
+  return response.json();
+}
+
+export async function revertCommit(
+  directory: string,
+  hash: string
+): Promise<RevertCommitResponse> {
+  const response = await fetch(buildUrl(`${API_BASE}/revert-commit`, directory), {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ hash }),
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ error: response.statusText }));
+    throw new Error(error.error || 'Failed to revert commit');
+  }
+  return response.json();
+}
+
+export async function resetToCommit(
+  directory: string,
+  hash: string,
+  mode: 'soft' | 'mixed' | 'hard',
+  force?: boolean
+): Promise<ResetToCommitResponse> {
+  const response = await fetch(buildUrl(`${API_BASE}/reset-to-commit`, directory), {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ hash, mode, force }),
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ error: response.statusText }));
+    throw new Error(error.error || 'Failed to reset');
+  }
+  return response.json();
+}
+
 export async function abortMerge(directory: string): Promise<{ success: boolean }> {
   const response = await fetch(buildUrl(`${API_BASE}/merge/abort`, directory), {
     method: 'POST',