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/i18n/messages/zh-TW.ts

@@ -504,12 +504,41 @@ export const dict: Record<I18nKey, string> = {
   'gitView.header.identityTooltip': 'Git 身分',
   'gitView.header.noIdentity': '無身分',
   'gitView.header.noProfiles': '沒有可套用的設定。',
+  'gitView.header.repositoryViews': '儲存庫檢視',
   'gitView.header.removeRemoteAria': '移除遠端 {name}',
   'gitView.header.removeRemoteTitle': '移除 {name}',
   'gitView.header.upstreamSynced': '已同步',
   'gitView.header.upstreamTooltip': '與 {target} 比較。',
   'gitView.header.upstreamTooltipTracking': '與 {target} 比較。主要同步徽章仍反映 {tracking}。',
   'gitView.history.binary': '二進位',
+  'gitView.history.actions.cancelButton': '取消',
+  'gitView.history.actions.checkout': '簽出',
+  'gitView.history.actions.checkoutConfirm': '要將此提交簽出為 detached HEAD 嗎？',
+  'gitView.history.actions.cherryPick': 'Cherry-pick',
+  'gitView.history.actions.cherryPickConfirm': '要將此提交 cherry-pick 到目前分支嗎？',
+  'gitView.history.actions.conflictToastDescription': '衝突檔案：{files}。請手動解決並提交，或使用 git cherry-pick/revert --abort 中止。',
+  'gitView.history.actions.conflictToastTitle': '衝突',
+  'gitView.history.actions.confirmButton': '確認',
+  'gitView.history.actions.createBranch': '在此建立分支',
+  'gitView.history.actions.createBranchConfirm': '建立',
+  'gitView.history.actions.createBranchPlaceholder': '分支名稱',
+  'gitView.history.actions.detachedHead': '已簽出（detached HEAD）',
+  'gitView.history.actions.merge': '合併到目前分支',
+  'gitView.history.actions.mergeConfirm': '要將此提交合併到目前分支嗎？',
+  'gitView.history.actions.rebase': 'Rebase 到此處',
+  'gitView.history.actions.rebaseConfirm': '要將目前分支 rebase 到此提交嗎？',
+  'gitView.history.actions.reset': 'Reset...',
+  'gitView.history.actions.resetHard': 'Hard — 捨棄所有變更',
+  'gitView.history.actions.resetHardConfirm': 'Hard reset — HEAD 會移動，所有未提交變更將永久捨棄。',
+  'gitView.history.actions.resetHardConfirmButton': '捨棄變更',
+  'gitView.history.actions.resetMixed': 'Mixed — 取消暫存變更',
+  'gitView.history.actions.resetMixedConfirm': 'Mixed reset — HEAD 會移動，變更將取消暫存。',
+  'gitView.history.actions.resetSoft': 'Soft — 保留暫存',
+  'gitView.history.actions.resetSoftConfirm': 'Soft reset — HEAD 會移動，已暫存變更會保留。',
+  'gitView.history.actions.revert': 'Revert',
+  'gitView.history.actions.revertConfirm': '要暫存對此提交的 revert 嗎？',
+  'gitView.history.loadMore': '載入更多',
+  'gitView.history.loadingMore': '載入中...',
   'gitView.history.binaryNoDiff': '二進位檔案 — 無可用 diff',
   'gitView.history.commitsPlaceholder': '提交數',
   'gitView.history.copySha': '複製 SHA',
@@ -526,6 +555,7 @@ export const dict: Record<I18nKey, string> = {
   'gitView.history.renamedNoDiff': '已重新命名檔案 — 不支援 diff',
   'gitView.history.renderDiffAnyway': '仍然渲染',
   'gitView.history.title': '歷史紀錄',
+  'gitView.graph.title': '圖譜',
   'gitView.integrate.checking': '檢查中…',
   'gitView.integrate.cherryPickAbortedToast': '已中止 cherry-pick',
   'gitView.integrate.cherryPickConflictDescription': '請先解決衝突，然後繼續。',