Give the mouse back, retire the follow controls, update Claude per session

Three things the terminal was getting wrong.

**A program that grabs the mouse and dies used to freeze the tab.** A TUI sets
DECSET ?1000/?1002/?1003; if it exits without resetting them, xterm keeps
routing clicks, drags and — under ?1003 — every pointer *move* to the PTY.
Text selection dies and escape bytes flood the prompt. The only exit was
closing the tab. `TerminalView` now reconciles a flag against
`term.modes.mouseTrackingMode` in the `term.write()` callback — the mode only
changes because the container printed a sequence, so one check per write
catches every transition with no polling — and `Ctrl+Shift+X` or a status-bar
button writes the resets back through `term.write`, never `sendInput`: the
reset belongs to xterm's parser, and a still-live TUI told about it would just
re-grab on its next repaint.

The control is in the status bar deliberately. Mouse tracking is the *normal*
state of htop, vim, lazygit and Claude Code, so a badge over the terminal
would be on screen for the whole life of those programs and would swallow
clicks aimed at their own top-right corner. `macOptionClickForcesSelection` is
also on now: xterm's force-select is Shift everywhere except macOS, where it
is Option and is gated behind that option, which defaults to false — so until
now Mac users had no way to select text while a program held the mouse.

**"Following" and "Jump to Current" are gone.** Claude Code draws on the
alternate screen, which has no scrollback, so `viewportY` always equalled
`baseY` and neither control could do anything. They did still work in bash
tabs; xterm's native follow covers that, and the per-write `scrollToBottom()`
went with them because it fought exactly that. What remains, on activate and
after a refit, now samples `viewportY >= baseY` *before* the fit, so opening
the Notes dock no longer yanks a reader to the tail.

**`claude update` runs before every Claude session, not just at container
start.** Containers here stop/start and often just keep running, so a
long-lived one never re-checked. Both copies take the same flock: the
entrypoint prints "container ready" only after its own update finishes, so
opening a tab immediately would otherwise run two updaters against the same
~/.claude/bin, with `|| echo` hiding a half-written install one line before
`exec claude` ran it.

This turns the non-Bedrock path from a bare argv into a `bash -c` wrapper, so
flags and session names are shell-interpolated now and must go through
`shell_quote_arg`.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0145mQi9NZiCDrznBUEEDE4n

README.md

@@ -528,7 +528,7 @@ Triple-C includes optional speech-to-text powered by [Faster Whisper](https://gi
 | `app/src/components/layout/TopBar.tsx` | Hosts MainTabs + Docker/Image status indicators + Help |
 | `app/src/components/layout/MainTabs.tsx` | The single main-area tab strip (Project Home + terminal tabs), pointer-event drag reordering |
 | `app/src/components/layout/Sidebar.tsx` | Responsive sidebar (25% width, min 224px, max 320px), collapsible to an icon rail |
-| `app/src/components/layout/StatusBar.tsx` | Project/terminal counts, Jump to Current, STT mic |
+| `app/src/components/layout/StatusBar.tsx` | Project/terminal counts, Notes toggle, STT mic |
 | `app/src/components/projects/ProjectRow.tsx` | Select-only sidebar row; opens Project Home, with hover start/stop and terminal controls |
 | `app/src/components/projects/ProjectList.tsx` | Project list in sidebar |
 | `app/src/components/projects/PermissionModeControl.tsx` | Plan / Default / Accept Edits / Bypass segmented control |