fix(shot): mattermost hook v2 — interstitial appears on ANY first-visit route incl /login (proven byte-identical PNG); click 'View in Browser' best-effort then settle; unit test covers click + no-interstitial fallback; 207 pass, lint PASS

tests/mattermost-lts/recipe_meta.py

@@ -21,11 +21,17 @@ EXTRA_ENV = {"TIMEOUT": "600"}
 
 
 def SCREENSHOT(page, ctx):
-    """Land the real sign-in form for the CI card (phase-shot). The default landing capture gets
-    mattermost's "view in desktop app or browser?" interstitial at `/` — a real page but not
-    representative of the app. `/login` renders the standard login form directly. Credential-free
-    (empty fields, R7 secret-safety: never a page showing generated secrets); the harness snaps
-    the PNG after this returns."""
+    """Land the real sign-in form for the CI card (phase-shot). Mattermost serves a
+    "view in desktop app or browser?" interstitial on a browser's FIRST visit to ANY route
+    (including /login — proven by shot-proof2-mattermost-lts: byte-identical interstitial PNG with
+    and without a plain /login hook); a real user clicks "View in Browser" to reach the login
+    form, so the hook does exactly that. Click + second settle are best-effort (if the
+    interstitial is absent we are already on the form). Credential-free (empty fields, R7
+    secret-safety); the harness snaps the PNG after this returns. Waits are kept short (8s/3s/8s)
+    so the realistic hook path stays well inside the ~60s step budget — the 45s nav deadline is
+    only burned when the app never serves, and then the hook raises before any settle."""
+    import contextlib
+
     from harness import browser as harness_browser
     from harness import screenshot as screenshot_mod
 
@@ -36,4 +42,7 @@ def SCREENSHOT(page, ctx):
         deadline_seconds=screenshot_mod.NAV_DEADLINE_S,
         wait_until="domcontentloaded",
     )
-    screenshot_mod.settle(page)
+    screenshot_mod.settle(page, 8_000)
+    with contextlib.suppress(Exception):
+        page.click("text=View in Browser", timeout=3_000)
+        screenshot_mod.settle(page, 8_000)