Phases 0-1 + Sprint A: module split, CLI layer, org-refresh fix, hygiene

- LICENSE (MIT) + README truth-pass; docs/cli.md CLI contract
- CLI subcommands (src/cli_cmds/) per "TUI for users, CLI for users+AI"
- Hub/detail refactor: keymap dispatch, modal split, action enum, BgMsg bus
- Fix: org repos were never refreshed (owner==username match); refresh now
  parallel — 49 repos in ~11s, surfaced 70 previously invisible PRs
- Fix: 3 date bugs in detail/git.rs (format-local, Local::now, 1y month math)
- Stash indicator + [m] actions, session persistence, gh CLI token fallback
- Legacy UI modules removed; plan/ docs (roadmap, audit, debate, handoff)

src/hub/state_rows.rs

@@ -0,0 +1,40 @@
+//! Row-addressing types: which concrete item a position in the hub's visible
+//! list (`DisplayRow`) or a queued confirmation (`PendingAction`) refers to,
+//! plus the per-repo "focused extra" data shown for whichever row the cursor
+//! is currently on.
+
+/// One row in the currently-displayed list (`HubState::display`). Which tab
+/// is active determines which variant appears — a given `display` list is
+/// always one variant, never mixed.
+#[derive(Clone)]
+pub enum DisplayRow {
+    Repo    { repo_idx: usize },
+    Project { proj_idx: usize },
+    Todo    { todo_idx: usize },
+    Pr      { pr_idx: usize },
+    Issue   { issue_idx: usize },
+}
+
+/// A sync/release action the user confirmed but that needs the confirm modal
+/// closed first before `tui_phase` actually runs it, so the dialog isn't
+/// still on screen while the (potentially slow) operation executes.
+#[derive(Clone)]
+pub enum PendingAction { Release }
+
+/// Background diff fetch for the currently-focused repo: `Loading` while the
+/// thread spawned by `HubState::update_focused_extra` is still running,
+/// `Ready` once it reports back.
+pub enum DiffState {
+    Loading,
+    Ready(Vec<String>),
+}
+
+/// Expensive per-repo data (recent commits, file count, working-tree diff)
+/// computed lazily for whichever repo the cursor is hovering. Cached by
+/// `repo_idx` in `HubState::focused_cache` and never cleared on scroll —
+/// only a manual refresh recomputes it, so revisiting a repo is instant.
+pub struct FocusedExtra {
+    #[allow(dead_code)] pub commits: Vec<(String, String)>, // kept: focused-repo data model
+    pub file_count:   usize,
+    pub diff_preview: DiffState,
+}