feat(vcs): correct Git log graph projection and expand history views (#1076)

Git Log could lose commits when filtering by several paths, draw wrong
ancestry after filtering or collapsing rows, and open the wrong
repository in multi-root views. The graph is now projected over the full
commit DAG and laid out in Bek order, so filtered and collapsed views keep
the real ancestry; each log view keeps its own filters and requests.

Commit metadata, messages and path changes are kept in a persistent index
(by object id, in the IDE's cache directory) with seekable paging, and the
log gains parent-aware merge comparisons, a lazy revision browser,
read-only logs of repositories outside the project (opened with command
execution disabled), commit bookmarks, configurable built-in columns and
batched commit details. The adapted IntelliJ algorithms are attributed in
THIRD_PARTY_LICENSES.md.

Closes #872

Co-authored-by: shohruh-genius <[email protected]>

src/features/vcs/GitLog.module.css

@@ -139,12 +139,23 @@
 
 /* commit table */
 .listWrap {
+  position: relative;
   flex: 1;
   min-height: 0;
   display: flex;
   flex-direction: column;
   min-width: 0;
 }
+.speedSearch {
+  position: absolute;
+  top: 4px;
+  right: 8px;
+  z-index: 1;
+  padding: 4px 8px;
+  background: var(--bg-popup);
+  border: 1px solid var(--border);
+  color: var(--fg);
+}
 .list {
   flex: 1;
   min-height: 0;
@@ -165,6 +176,39 @@
   cursor: default;
   font-size: var(--fs-ui);
 }
+.columnHeader {
+  position: sticky;
+  top: 0;
+  z-index: 2;
+  background: var(--bg-app);
+  border-bottom: 1px solid var(--border);
+  color: var(--fg-subtle);
+}
+.columnHeader:hover {
+  background: var(--bg-app);
+}
+.columnCell {
+  flex: none;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.columnHeading {
+  position: relative;
+  padding-inline-end: 6px;
+  cursor: grab;
+}
+.columnResize {
+  position: absolute;
+  inset-block: 0;
+  inset-inline-end: 0;
+  width: 6px;
+  cursor: col-resize;
+  touch-action: none;
+}
+.columnResize:focus-visible {
+  outline: 2px solid var(--focus-ring);
+  outline-offset: -2px;
+}
 /* View Options › Highlight › Current Branch: commits reachable from HEAD are tinted. */
 .currentBranch {
   --log-row-bg: var(--bg-log-current-branch);
@@ -342,6 +386,21 @@
   user-select: text;
   font-size: var(--fs-ui);
 }
+.commitTooltip {
+  width: min(520px, calc(100vw - 32px));
+  max-height: 60vh;
+  overflow: auto;
+  padding: 12px;
+  white-space: normal;
+  user-select: text;
+}
+.revisionSource {
+  flex: 1;
+  min-height: 0;
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+}
 .subjectLine {
   color: var(--fg-strong);
   font-weight: 600;
@@ -349,6 +408,12 @@
   word-break: break-word;
   line-height: 1.5;
 }
+.expandMessage {
+  display: block;
+  margin-block-start: 6px;
+  font-weight: normal;
+  font-size: var(--fs-small);
+}
 .fullMessage {
   margin-top: 6px;
   color: var(--fg);