fix: repair test regressions and add pre-commit/pre-push verification gates

Fix four pre-existing bugs exposed after resolving a build failure:
- sandboxCloneSource: accept any URL scheme for origin remote (was filtering out https://)
- setupSandbox callers: fix := shadow variable so sandboxDir is set on BlockedError
- parseGeminiStream: parse result lines to return execution errors and cost
- TestElaborateTask_InvalidJSONFromClaude: stub Gemini fallback so test is hermetic

Add verification infrastructure:
- scripts/verify: runs go build + go test -race, used by hooks and deploy
- scripts/hooks/pre-commit: blocks commits that don't compile
- scripts/hooks/pre-push: blocks pushes where tests fail
- scripts/install-hooks: symlinks version-controlled hooks into .git/hooks/
- scripts/deploy: runs scripts/verify before building the binary

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/internal/executor/claude_test.go b/internal/executor/claude_test.go
index 04ea6b7..e76fbf2 100644
--- a/internal/executor/claude_test.go
+++ b/internal/executor/claude_test.go
@@ -414,7 +414,7 @@ func TestSetupSandbox_ClonesGitRepo(t *testing.T) {
 	src := t.TempDir()
 	initGitRepo(t, src)
 
-	sandbox, err := setupSandbox(src)
+	sandbox, err := setupSandbox(src, slog.New(slog.NewTextHandler(io.Discard, nil)))
 	if err != nil {
 		t.Fatalf("setupSandbox: %v", err)
 	}
@@ -441,7 +441,7 @@ func TestSetupSandbox_InitialisesNonGitDir(t *testing.T) {
 	// A plain directory (not a git repo) should be initialised then cloned.
 	src := t.TempDir()
 
-	sandbox, err := setupSandbox(src)
+	sandbox, err := setupSandbox(src, slog.New(slog.NewTextHandler(io.Discard, nil)))
 	if err != nil {
 		t.Fatalf("setupSandbox on plain dir: %v", err)
 	}
@@ -621,12 +621,12 @@ func TestTeardownSandbox_BuildSuccess_ProceedsToAutocommit(t *testing.T) {
 func TestTeardownSandbox_CleanSandboxWithNoNewCommits_RemovesSandbox(t *testing.T) {
 	src := t.TempDir()
 	initGitRepo(t, src)
-	sandbox, err := setupSandbox(src)
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
+	sandbox, err := setupSandbox(src, logger)
 	if err != nil {
 		t.Fatalf("setupSandbox: %v", err)
 	}
 
-	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
 	execRecord := &storage.Execution{}
 	
 	headOut, _ := exec.Command("git", "-C", sandbox, "rev-parse", "HEAD").Output()