Change escapeLike to use '!' instead of '\' as the ESCAPE character
in LIKE clauses. The backslash escape conflicted with Windows path
separators stored in root_path, causing prefix filters to fail on
Windows. Update all three LIKE ESCAPE clauses (ListJobs, CountJobStats,
ListReposWithReviewCountsByPrefix).

Also fix review hint paths to show full absolute paths instead of bare
repo names, and use strings.Builder to satisfy the modernize linter.

Add TestEscapeLike and TestPrefixFilterWithSpecialChars to verify
correct escaping of !, %, and _ characters.

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

Replace three near-identical ListReposWithReviewCounts* functions with
a single ListReposWithReviewCounts(opts ...ListReposOption) using
composable WithRepoPathPrefix and WithRepoBranch options. This matches
the existing ListJobsOption pattern in jobs.go and enables combined
prefix+branch filtering that was previously impossible (the if/else
chain in handleListRepos made them mutually exclusive).

Add filepath.Clean normalization for repo_prefix and prefix query
params in handleListJobs and handleListRepos to handle trailing
slashes and ".." segments.

Add tests for combined prefix+branch filtering, trailing-slash
normalization, and dot-dot path normalization.

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

When running from a non-git parent directory (workspace mode), the
auto-detected branch was correctly suppressed since it makes no sense
to filter by one repo's branch across a workspace. However, an
explicit --branch flag was also being dropped. Check cmd.Flags().Changed
to honor explicitly passed --branch values in workspace mode.

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

findChildGitRepos checked info.IsDir() for .git, which missed git
worktrees and submodules where .git is a file pointing to the actual
git directory. Remove the IsDir() check — os.Stat succeeding is
sufficient to confirm the entry is a git repo.

The hint path fix (showing full absolute paths instead of bare repo
names) was included in the earlier ESCAPE commit since it touched the
same code. This commit adds the .git file detection fix and tests for
both behaviors.

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

#7920: Add CountJobStats and ListReposWithReviewCounts prefix tests
with special chars (!, %, _) and backslash-in-path test verifying no
SQL errors after the ESCAPE char change.

#7922: Add dot-dot normalization test for /api/repos prefix endpoint.

#7923: Add workspace-mode integration tests verifying auto-detected
branch is suppressed and explicit --branch is honored.

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

Complete seeded jobs before asserting CountJobStats so the test
validates actual prefix-filter behavior (2 done under prefix, not 3)
instead of vacuously passing with all-zero stats from queued jobs.

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

Add filepath.ToSlash after filepath.Clean on repo_prefix and prefix
query params in handleListJobs and handleListRepos, and on the
client-side prefix in list.go. The SQL LIKE clause uses '/%' as the
separator, so backslash-separated Windows paths from filepath.Abs or
filepath.Clean would fail to match.

Add tests for roborev show outside a git repo: default invocation
returns a guidance error, explicit --job ID still works.

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

Add TestHandleListJobsSlashNormalization and
TestHandleListReposSlashNormalization verifying that forward-slash
prefixes (the output of filepath.ToSlash) correctly match stored
repo paths through the handler pipeline.

Note: filepath.ToSlash is already platform-conditional by design —
it replaces os.PathSeparator with '/', which is a no-op on POSIX
(where os.PathSeparator is already '/'). Backslashes in POSIX path
segments are valid filename characters and are not transformed.

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

RenameRepo was missing filepath.ToSlash after filepath.Abs, so on
Windows the backslash path didn't match the forward-slash stored path.

Tests used hardcoded Unix paths (/tmp/workspace, /ws, etc.) which on
Windows get a drive prefix from filepath.Abs (C:/tmp/workspace),
causing prefix filters to miss. Switch to t.TempDir()-based paths
that are absolute on all platforms.

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