multiline paste and cursor fix

CLAUDE.md

@@ -145,6 +145,24 @@ UI thread redraws on its own tick (no channel; just the mutex).
 - Mouse is captured: wheel always scrolls the feed (regardless of focus), and
   left-drag selects screen text, copied on release via OSC 52 (like Claude
   Code). Native terminal selection therefore needs shift held.
+- Bracketed paste is enabled on the outer terminal (`EnableBracketedPaste`):
+  a multiline paste arrives as one `Event::Paste` and, when the claude pane
+  has focus, is handed to the child via `EmbeddedTerm::paste`
+  (wezterm-term's `send_paste` re-wraps it in bracketed markers iff the child
+  enabled them) — so Claude Code inserts it as one block instead of
+  submitting on the first embedded newline. Paste is ignored when the pane is
+  unfocused (nothing else takes text input).
+- Pane cursor shape mirrors the child: each frame `draw` records the child's
+  DECSCUSR shape (`EmbeddedTerm::cursor_shape`) into `EmbedUi::cursor_shape`
+  and the event loop emits `SetCursorStyle` only on change (so a blinking
+  cursor isn't reset every frame), resetting to `DefaultUserShape` when no
+  pane cursor is shown / on teardown. Without this the outer terminal kept a
+  stale block cursor regardless of Claude Code's insert-vs-vim-normal state.
+  `term::cursor_style` maps the child's DECSCUSR `Default` to a blinking *bar*,
+  not `DefaultUserShape`: Claude Code's normal input leaves the cursor at the
+  terminal default expecting a bar caret, so forwarding the outer terminal's
+  own default (often a block) would wrongly show a block in insert mode; vim
+  normal mode still sends an explicit `SteadyBlock`.
 - ratatui needs feature `unstable-rendered-line-info` for `Paragraph::line_count`
   (used to compute cached per-entry wrapped heights for follow/auto-scroll).
 - reqwest is `default-features = false` + `rustls-tls,stream` — don't enable
@@ -170,11 +188,11 @@ UI thread redraws on its own tick (no channel; just the mutex).
 - Tool results only appear once the *next* request fires; if the session ends
   right after a tool call, that result is never seen. Output is what Claude
   Code sends the model (i.e. post-truncation).
-- Embedded pane: no bracketed paste or mouse forwarding yet; no scrollback
-  view (live screen only); shift+enter needs kitty keyboard protocol pushed
-  on the outer terminal (not done); permission prompts aren't detected for
-  pane growth (not visible in the API stream — would need a Notification
-  hook hitting a local control endpoint).
+- Embedded pane: no mouse forwarding yet; no scrollback view (live screen
+  only); shift+enter needs kitty keyboard protocol pushed on the outer
+  terminal (not done); permission prompts aren't detected for pane growth
+  (not visible in the API stream — would need a Notification hook hitting a
+  local control endpoint).
 - Materialized branch files satisfy our own parser (round-trip tested) but
   Claude Code's loader tolerance is only verified empirically by resuming
   one — if a CC update changes the JSONL schema, retest `b` + ctrl-↓. The