fix(tiles): page a hollow tile's CLI transcript and report its clicks (#555 parity)

#555 made the primary pane page opencode's transcript with PageUp/PageDown
from the wheel, because opencode draws in place on the alternate screen and
leaves the browser's buffer with no scrollback. A TerminalTile (a grid tile,
the split's Pane B) left every wheel to xterm, so in an opencode tile the
wheel scrolled nothing, or only stale rows.

The tile now runs the primary pane's own gates aimed at itself (its terminal,
its session, never the active one): xterm's tracking mode, the Claude
forwarding gate, then the hollow-buffer test. A wheel that passes them is
consumed in the capture phase and turned into PageUp/PageDown through the
shared pageKeysForTravel math, coalesced per tile (40 ms, 512 bytes, the twin
of the primary pane's queue) and sent ephemeral on the tile's own socket.
Every other wheel stays with xterm as before, the shell history pull
included. The file names no CLI: the mode rules stay in terminal-ui.js, and
terminal-tile.js joins the frontend no-id-branching guard.

A plain port of the primary's baseY === 0 test would almost never fire in a
grid. A tile's first capture is taken at the PTY's previous size (usually the
taller primary pane's) and written into a shorter xterm, and its own
row-shrinking fits (zoom-out, divider drags, tile count changes) push more
rows above the screen. The tile counts those rows as its own overflow: all of
them after a load whose capture held a single screen (the server's
captureRows), plus whatever a local fit or a PTY geometry report pushes up,
reset by a clear and clamped to baseY. The paging gate gets baseY minus that
count. Output that scrolls real lines still counts as history, so the tile
stops paging there.

#555's other half, stripping opencode's mouse DECSETs so a drag selects text,
is server-side and already reached tile sockets. It also left the tile's
xterm unable to encode opencode's clicks, so the tile now installs the
primary pane's desktop click report (bubble phase, gated on the session's
cliMouseTracking, the tile's own link hover and selection). Both listeners,
the flush timer and the page-key state are torn down in destroy().

Still out of scope, as the fileoverview now says: touch paging (tiles have
no touch path) and SGR wheel forwarding to Claude's fullscreen renderer
(tile-grid-plan follow-up 4), so a fullscreen Claude tile keeps leaving the
wheel to xterm.

Tests: test/terminal-tile-scroll.test.ts drives a real tile in the vm
harness (session targeting, every no-page case, accumulation, the cap,
coalescing, byte parity with the primary pane, the overflow discount through
a load, a fit, a geometry report and a clear, the click report and destroy);
the discount cases fail with it removed. The fake xterm gains opt-in row
emulation. test/terminal-tile-scroll.browser.test.ts checks the same model
against a real xterm with trusted wheel events (browser suite, not the gate).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -286,7 +286,7 @@ Codeman is a Claude Code session manager with web interface and autonomous Ralph
 
 **Ctrl+V paste trap** (`image-input.js`): `Ctrl+V` routes through `_handleImagePaste()`, which focuses a hidden `contenteditable` trap and reads the clipboard from the paste event landing there; images upload and their paths are typed in, text goes through `terminal.paste()` so bracketed-paste markers survive. ⚠️ **The trap must consume exactly ONE paste event** (Firefox delivers two per keypress: the `execCommand('paste')` event and the keydown's default action); the one-shot flag lives on the trap, never on a browser check. ⚠️ Do not remove the `execCommand('paste')` call: on some mobile engines it is the only route into the trap, and the trap is the only place image blobs are read. Tests: `test/image-paste-trap.test.ts`. → [architecture-invariants#terminal-paste-ctrlv](docs/architecture-invariants.md#terminal-paste-ctrlv)
 
-**Terminal scrollback strip + wheel/touch forwarding**: codex/claude/gemini get the FULL strip (alt-screen, `3J`, mouse DECSETs); tmux-backed opencode gets the MIDDLE strip (alt-screen toggles + mouse DECSETs, `3J` kept); every other tmux-backed mode (shell/antigravity/pi/grok/deepseek/omp) gets the NARROW strip (alt-screen toggles only). Table: `CliCapabilities.altScreen` JSDoc, pinned in test/claude-scrollback-strip.test.ts. ⚠️ Gated on `useMux`: direct-PTY sessions must keep the alt screen. Wheel and touch forward to the CLI for **claude ≥ 2.1.187 ONLY, and only while it has mouse tracking on** (`cliMouseTracking`: fullscreen claude sets it, its default inline renderer does not and scrolls locally like codex); ⚠️ never re-add codex without a fresh measurement (it ignores SGR wheel reports). ⚠️ `getClaudeCliVersion()` must never cache a FAILED probe. ⚠️ Hand-report clicks only while the CLI has mouse tracking on: `_shouldReportMouseToCli()` gates all three report sites on `cliMouseTracking` (from `_recordStrippedMouseMode()`, session.ts), or a plain shell prints the reports as literal text. Read `_logScrollRouting()` before diagnosing a scroll report. → [architecture-invariants#terminal-scrollback-strip-flavors-and-wheeltouch-forwarding](docs/architecture-invariants.md#terminal-scrollback-strip-flavors-and-wheeltouch-forwarding)
+**Terminal scrollback strip + wheel/touch forwarding**: codex/claude/gemini get the FULL strip (alt-screen, `3J`, mouse DECSETs); tmux-backed opencode gets the MIDDLE strip (alt-screen toggles + mouse DECSETs, `3J` kept); every other tmux-backed mode (shell/antigravity/pi/grok/deepseek/omp) gets the NARROW strip (alt-screen toggles only). Table: `CliCapabilities.altScreen` JSDoc, pinned in test/claude-scrollback-strip.test.ts. ⚠️ Gated on `useMux`: direct-PTY sessions must keep the alt screen. Wheel and touch forward to the CLI for **claude ≥ 2.1.187 ONLY, and only while it has mouse tracking on** (`cliMouseTracking`: fullscreen claude sets it, its default inline renderer does not and scrolls locally like codex); ⚠️ never re-add codex without a fresh measurement (it ignores SGR wheel reports). ⚠️ `getClaudeCliVersion()` must never cache a FAILED probe. ⚠️ Hand-report clicks only while the CLI has mouse tracking on: `_shouldReportMouseToCli()` gates all three report sites on `cliMouseTracking` (from `_recordStrippedMouseMode()`, session.ts), or a plain shell prints the reports as literal text. ⚠️ A `TerminalTile` (grid tile, split Pane B) pages the wheel and reports clicks through these SAME gates with itself as the target (its terminal, its session, never `activeSessionId`); never copy the mode lists into terminal-tile.js. Read `_logScrollRouting()` before diagnosing a scroll report. → [architecture-invariants#terminal-scrollback-strip-flavors-and-wheeltouch-forwarding](docs/architecture-invariants.md#terminal-scrollback-strip-flavors-and-wheeltouch-forwarding)
 **Detached start + service install**: `codeman web -d` relaunches the same entry script `detached:true` (setsid); `nohup` is not what makes it survive. ⚠️ Both `-d` and `service install` must REFUSE when a server is already up on this data dir (pidfile + `/api/status` probe), or a second instance attaches to the first one's live sessions. ⚠️ Never report success not observed: poll `/api/status` until the child answers or dies. `--stop` must verify the pid still looks like Codeman (`ps -o command=`) before signalling. Unit/label names live only in `config/service-names.ts`. `service install` bakes the installing shell's PATH into the unit and never writes `CODEMAN_PASSWORD` into it. → [architecture-invariants#detached-start-and-service-install](docs/architecture-invariants.md#detached-start-and-service-install)
 
 **Self-update** (App Settings → System → Updates): in-app updater for git-clone installs under a supervisor (`systemd`, `launchd`, `launchd-daemon`, `docker-compose`, else `none`). The work runs in a DETACHED `scripts/self-update.sh` writing `update-status.json`, polled across the restart; pure helpers in `src/web/self-update.ts`. ⚠️ Compose: the restart kills the script, so nothing may be appended after the `restarting` marker; the repo must stay a host bind mount over `/opt/codeman` and the image must keep devDependencies + toolchain. ⚠️ `evaluateEnvironmentGate()` refuses releases that change `server.Dockerfile`/`docker-compose.yaml` or add `.env.example` keys, re-evaluated on `POST /api/system/update`; unknowns fail OPEN, but the exit-to-restart needs `--restart-by-exit 1` (`CODEMAN_RESTART_BY_EXIT=1` only in the Compose file). ⚠️ Keep the agent CLIs in `server.Dockerfile` pinned. → [docs/docker-self-update.md](docs/docker-self-update.md), [architecture-invariants#self-update](docs/architecture-invariants.md#self-update)