feat(scoring): transition workflow learning and fix history UX (#39)

- add transition scoring engine to learn sequential workflows per
directory using command skeletons
- prioritize current active git branch over older branches in
suggestions
- restore strict chronological order for history navigation and bypass
AI re-ranking
- add in-memory session history for instant access to just-run commands
- fix PTY prompt not syncing when using arrow keys in the history menu
- fix history tie-breaker to properly prioritize newer commands by
assigning larger IDs
- fix potential mutex deadlock between bufferMu and pty write during
history navigation
- fix workspace git detection to remove depth limits and correctly
identify repositories with detached HEADs
- fix SQLite connection leaks in frecency queries
- fix global state leaks in history tests by snapshotting and restoring
registry states
- modernize string prefix checks using strings.CutPrefix

internal/scoring/context_rules_test.go

@@ -61,6 +61,18 @@ func TestApplyContextRules_MultiEcosystem(t *testing.T) {
 			cmd:      "kubectl get pods",
 			expected: 40,
 		},
+		{
+			name:     "git push active branch gets double bonus clamped to 100",
+			ws:       workspace.WorkspaceInfo{HasGit: true, GitBranch: "fix/scoring"},
+			cmd:      "git push origin fix/scoring",
+			expected: 100, // 40 (git push) + 60 (active branch) = 100
+		},
+		{
+			name:     "git push other branch gets normal git push bonus only",
+			ws:       workspace.WorkspaceInfo{HasGit: true, GitBranch: "fix/scoring"},
+			cmd:      "git push origin fix/alias",
+			expected: 40,
+		},
 		{
 			name:     "unrelated command gets no bonus",
 			ws:       workspace.WorkspaceInfo{HasGit: true},