diff --git a/booth/app.py b/booth/app.py
index 5f88a82..b72f794 100644
--- a/booth/app.py
+++ b/booth/app.py
@@ -136,7 +136,21 @@ def set_booth_blurred(booth: Path, on: bool) -> bool:
     state the caller asked for, exactly as unflagging an unflagged item is."""
     marker = booth / BOOTH_BLUR_FILE
     if on:
-        marker.touch(exist_ok=True)
+        # NEVER through a link (r2b, heid bug-hunt). `touch()` followed a
+        # planted `.blurbooth` symlink: a click rewrote an outside file's
+        # mtime, or created a dangling target — the class `record_view` was
+        # hardened against. Anything already at the name, a link included,
+        # already reads as fogged (`is_booth_blurred`), so there is nothing to
+        # write; otherwise create exclusively, never following a link.
+        try:
+            os.lstat(marker)
+            return True
+        except FileNotFoundError:
+            pass
+        try:
+            os.close(os.open(marker, os.O_WRONLY | os.O_CREAT | os.O_EXCL | os.O_NOFOLLOW, 0o644))
+        except FileExistsError:
+            pass                                   # lost a race to another fog: still fogged
         return True
     try:
         marker.unlink()
@@ -2143,7 +2157,10 @@ def create_app(
         booth = resolve_booth(name)
         set_booth_blurred(booth, on not in ("0", "false", ""))
         landing = f"/b/{quote(name, safe='')}/"
-        if back:
+        # The review only for an item of the review ring (r2b, heid bug-hunt),
+        # exactly as the mark routes' back=view: a stale or foreign `back`
+        # would otherwise land on a 404. Built from the ring, never echoed.
+        if back and back in review_chain(booth_items(booth)):
             landing += f"view?f={quote(back, safe='/')}"
         return RedirectResponse(url=landing, status_code=303)
 
diff --git a/booth/templates/base.html b/booth/templates/base.html
index cbc6e78..a1ccf47 100644
--- a/booth/templates/base.html
+++ b/booth/templates/base.html
@@ -616,6 +616,11 @@
   .blur-all button:hover,.reveal-all-btn:hover{color:var(--text-body);border-color:var(--border-strong)}
   .blur-all.is-on button{color:var(--text-body);border-color:var(--border-strong)}
   .reveal-all-btn[aria-pressed="true"]{color:var(--text-body);border-color:var(--border-strong)}
+  /* One line each, always: a top bar at phone width squeezed these into
+     four-line stacks. Below 600px the reveal drops its "— blur is cosmetic"
+     tail; the title still says it, as does every per-item reveal. */
+  .blur-all button,.reveal-all-btn{white-space:nowrap}
+  @media (max-width:600px){.reveal-all-btn .ra-note{display:none}}
   .badge-blur{color:var(--text-muted)}
 
   /* ---- inline docs ------------------------------------------------------
@@ -1082,7 +1087,8 @@
     var key = 'booth.reveal:' + b;
     function show(btn) {
       var on = d.classList.contains('reveal-all');
-      btn.textContent = on ? '🙈 blur again' : '👁 reveal all — blur is cosmetic';
+      btn.querySelector('.ra-label').textContent = on ? '🙈 blur again' : '👁 reveal all';
+      btn.querySelector('.ra-note').hidden = on;
       btn.setAttribute('aria-pressed', on ? 'true' : 'false');
     }
     ctl.forEach(function (btn) {
diff --git a/booth/templates/booth.html b/booth/templates/booth.html
index 2591a88..d6cd1ff 100644
--- a/booth/templates/booth.html
+++ b/booth/templates/booth.html
@@ -106,13 +106,19 @@
   {# r2b D2b + D2: the booth-wide blur controls, outside every data-region.
      The fog is server state for every viewer and a plain form (works with
      scripts off); its label says what IS. Reveal all lifts it for this tab
-     only, and is markup only when something here is blurred. #}
-  {% if not board %}
-  <form class="blur-all{% if booth_blurred %} is-on{% endif %}" method="post" action="/b/{{ name_url }}/blurbooth">
+     only, and is markup only when something here is blurred. A BOARD gets
+     them too when it holds files: only the one-click wipe is board-suppressed,
+     and an item's "◉ booth" label points here. #}
+  {% if all_items %}
+  {# The fog form IS a region: its label is server state, so an in-place save
+     refreshes it with everything else (a fog set elsewhere since this page
+     loaded would otherwise leave it saying "blur booth"). Reveal all is not:
+     its state lives in this tab, and a swap must never reset it. #}
+  <span class="region-wrap" data-region="blur-booth"><form class="blur-all{% if booth_blurred %} is-on{% endif %}" method="post" action="/b/{{ name_url }}/blurbooth">
     <input type="hidden" name="on" value="{{ '0' if booth_blurred else '1' }}">
     <button title="{{ 'un-blur the whole booth — per-item blur stays as it was' if booth_blurred else 'blur every image and video in this booth — cosmetic only, the files are still served' }}">{{ '◉ booth blurred' if booth_blurred else '◌ blur booth' }}</button>
-  </form>
-  {% if all_items | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all hidden>👁 reveal all — blur is cosmetic</button>{% endif %}
+  </form></span>
+  {% if all_items | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all hidden title="blur is cosmetic — the files are still served"><span class="ra-label">👁 reveal all</span><span class="ra-note"> — blur is cosmetic</span></button>{% endif %}
   {% endif %}
     {% if not board %}
   <form class="wipe wipe-lg" method="post" action="/b/{{ name_url }}/delete"
diff --git a/booth/templates/doc.html b/booth/templates/doc.html
index fefa8c4..f9985b5 100644
--- a/booth/templates/doc.html
+++ b/booth/templates/doc.html
@@ -7,6 +7,9 @@
     <a class="vbtn vx" href="/b/{{ name_url }}/" title="back to gallery (Esc)">✕</a>
     <span class="vname">{{ file }}</span>
     <span class="vspacer"></span>
+    {# Reveal all can lift this page's blur, so this page must be able to put it
+       back (r2b, heid bug-hunt). #}
+    {% if blurred %}<button type="button" class="reveal-all-btn" data-reveal-all hidden title="blur is cosmetic — the files are still served"><span class="ra-label">👁 reveal all</span><span class="ra-note"> — blur is cosmetic</span></button>{% endif %}
     <a class="vbtn" href="{{ file_url }}?dl=1" title="download {{ file }}">⬇</a>
   </div>
   {# Same record, same reason as the image viewer: the sidecar that says what
@@ -17,11 +20,17 @@
     {% for m in marks if m.shape == 'note' %}<pre class="vnote">{{ m.text }}</pre>{% endfor %}
   </div>
   {% endif %}
+  {# Blur honesty reaches the full page too (r2b, heid code-review): a blurred
+     doc's own page rendered clear. Its reveal is per-page and JS-only, like the
+     review stage's; Reveal all lifts it by the same <html> class. #}
+  <div class="docbody{% if blurred %} is-blurred{% endif %}" id="docbody">
+  {% if blurred %}<button type="button" class="reveal" id="docreveal" hidden>👁 reveal — blur is cosmetic</button>{% endif %}
   {% if is_html %}
     <article class="markdown-body">{{ body|safe }}</article>
   {% else %}
     <pre class="textview">{{ body }}</pre>
   {% endif %}
+  </div>
 </div>
 <style>
   /* .markdown-body and .textview live in base.html (shared with the inline
@@ -32,6 +41,14 @@
   .doccap{margin:0 0 20px;padding:8px 14px;font-size:var(--size-body);line-height:var(--leading-body);
     color:var(--text-body);border-left:3px solid var(--border-strong);white-space:pre-wrap}
   .docmarks{display:flex;flex-direction:column;gap:8px;margin:0 0 20px}
+  .docbody{position:relative}
+  .docbody.is-blurred .markdown-body,.docbody.is-blurred .textview{filter:blur(22px);transition:filter var(--dur-2)}
+  .docbody.is-blurred.revealed .markdown-body,.docbody.is-blurred.revealed .textview,
+  .reveal-all .docbody.is-blurred .markdown-body,.reveal-all .docbody.is-blurred .textview{filter:none}
+  .reveal-all #docreveal{display:none}
+  #docreveal{position:absolute;top:10px;left:10px;z-index:2;cursor:pointer;font-family:var(--font-mono);
+    font-size:var(--size-micro);line-height:1;padding:6px 9px;border-radius:var(--radius-md);
+    border:1px solid rgb(255 255 255 / .16);background:oklch(0.17 0.01 250 / .86);color:oklch(0.91 0.008 216)}
 </style>
 <script>
   (function () {
@@ -42,6 +59,14 @@
       return !!(el && (el.isContentEditable ||
                        /^(input|textarea|select)$/i.test(el.tagName || '')));
     }
+    var rv = document.getElementById('docreveal');
+    if (rv) {
+      rv.hidden = false;
+      rv.addEventListener('click', function () {
+        var on = document.getElementById('docbody').classList.toggle('revealed');
+        rv.textContent = on ? '🙈 hide' : '👁 reveal — blur is cosmetic';
+      });
+    }
     document.addEventListener('keydown', function (e) {
       if (isEditable(e.target)) return;
       if (e.key === 'Escape') window.location.href = {{ ('/b/' ~ name_url ~ '/')|tojson }};
diff --git a/booth/templates/view.html b/booth/templates/view.html
index c990f09..354e78e 100644
--- a/booth/templates/view.html
+++ b/booth/templates/view.html
@@ -23,12 +23,12 @@
     {% endif %}
     {# r2b D2b + D2, in the top bar: outside every data-region, so no swap
        replaces them. The fog form carries `back` and lands on this item. #}
-    <form class="blur-all{% if booth_blurred %} is-on{% endif %}" method="post" action="/b/{{ name_url }}/blurbooth">
+    <span class="region-wrap" data-region="blur-booth"><form class="blur-all{% if booth_blurred %} is-on{% endif %}" method="post" action="/b/{{ name_url }}/blurbooth">
       <input type="hidden" name="on" value="{{ '0' if booth_blurred else '1' }}">
       <input type="hidden" name="back" value="{{ file }}">
       <button title="{{ 'un-blur the whole booth' if booth_blurred else 'blur every image and video in this booth — cosmetic only' }}">{{ '◉ booth blurred' if booth_blurred else '◌ blur booth' }}</button>
-    </form>
-    {% if film | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all hidden>👁 reveal all — blur is cosmetic</button>{% endif %}
+    </form></span>
+    {% if film | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all hidden title="blur is cosmetic — the files are still served"><span class="ra-label">👁 reveal all</span><span class="ra-note"> — blur is cosmetic</span></button>{% endif %}
     <a class="vbtn" href="{{ file_url }}" download title="download {{ file }}">⬇</a>
   </div>
 
@@ -230,7 +230,10 @@
       if (e.key === 'Escape') window.location.href = BACK;
       else if (e.key === 'ArrowLeft' && PREV) window.location.href = PREV;
       else if (e.key === 'ArrowRight' && NEXT) window.location.href = NEXT;
-      else if (e.key === ' ' && NEXT && e.target !== player) { e.preventDefault(); window.location.href = e.shiftKey && PREV ? PREV : NEXT; }
+      /* ...and never from a focused control: Space is how a keyboard presses a
+         button or follows a link (r2b, heid bug-hunt — Reveal all and the fog
+         control could not be pressed). */
+      else if (e.key === ' ' && NEXT && e.target !== player && !(e.target.closest && e.target.closest('button, a, summary'))) { e.preventDefault(); window.location.href = e.shiftKey && PREV ? PREV : NEXT; }
       else if (e.key === 'f' || e.key === 'F') {
         var b = document.getElementById('vflag-btn');   /* re-read: the rail may have been swapped */
         if (b) { e.preventDefault(); b.click(); }
diff --git a/docs/contracts/r2b_desk_reveal_theme.contract.md b/docs/contracts/r2b_desk_reveal_theme.contract.md
index a244830..6c314c9 100644
--- a/docs/contracts/r2b_desk_reveal_theme.contract.md
+++ b/docs/contracts/r2b_desk_reveal_theme.contract.md
@@ -104,11 +104,15 @@ different kind of thing from the lifetime pill (state) and the controls
 ## D2 — Reveal all (blur ruling A)
 
 - **One STATE per booth, shown by a control in two places: "👁 reveal all —
-  blur is cosmetic" / "🙈 blur again".** One instance is in the booth header,
-  one in the review's top bar, and both sit OUTSIDE every `data-region`, so no
-  in-place swap replaces them. The server puts the control in the markup only
-  when at least one item of the booth is blurred (`Item.blurred`), and always
-  with the `hidden` attribute. The script removes `hidden` and binds it. Without
+  blur is cosmetic" / "🙈 blur again".** It appears in the booth header, the
+  review's top bar and a blurred doc's own top bar. Every instance sits OUTSIDE
+  every `data-region`, so no in-place swap replaces it: its state lives in the
+  tab, and a swap must never reset it. Below 600px it reads "👁 reveal all";
+  its title still says the blur is cosmetic. The server puts the control in the markup only
+  where it can act, and always with the `hidden` attribute: in the header when
+  any item of the booth is blurred (`Item.blurred`), and in the review when any
+  item of the review RING is (a blurred doc is not on the review page, so a
+  control there would act on nothing). The script removes `hidden` and binds it. Without
   JS it is in the markup but never shown.
 - **State: `sessionStorage["booth.reveal:" + <booth name>] = "1"`.** Per booth,
   per tab, gone when the tab closes, so a blurred booth is blurred again next
@@ -131,8 +135,15 @@ different kind of thing from the lifetime pill (state) and the controls
   - Because every change of page is a full load, the class is re-decided per
     page, from that page's `data-booth`. Booth A's reveal cannot follow you
     into booth B.
-  - The index carries no `data-booth`, so **nothing on the index is revealed
-    by D2**, the Desk strip included.
+  - The index's `<html>` carries no `data-booth` (its rows' own `data-booth`
+    attributes are unrelated), so **nothing on the index is revealed by D2**,
+    the Desk strip included.
+- **A board holding files gets both controls.** Only the one-click wipe is
+  board-suppressed; an item's "◉ booth" label points at the header control,
+  so the control must be there.
+- **The full-page doc view is blurred honestly.** A blurred doc's own page
+  renders its body blurred, with its own JS-only reveal; Reveal all lifts it
+  by the same `<html>` class.
 - **The per-item reveal defers to it, BY STYLESHEET.** Under `.reveal-all` the
   per-tile and stage reveal buttons are `display: none`. That is a CSS
   consequence of the class, so markup swapped in after a save obeys it with no
@@ -148,9 +159,22 @@ booth-dev landed the whole-booth marker and its route while the panel was
 reading; this is the control the operator uses, which the blur ruling assumed.
 
 - **"◌ blur booth" / "◉ booth blurred" in the booth header and the review's
-  tape bar**: a plain `<form method=post action=/b/<name>/blurbooth>` with
+  top bar (`.vbar`)**, each wrapped in its OWN region, `blur-booth`. Its label is
+  server state, so an in-place save refreshes it with everything else; a fog
+  set elsewhere since the page loaded would otherwise leave it saying "blur
+  booth". It is a plain `<form method=post action=/b/<name>/blurbooth>` with
   `on=1|0`, so it works with scripts off (INV-2). From the review it carries
-  `back=<rel>` and lands back on the same item.
+  `back=<rel>`. The route lands on the review only when `back` is an item of
+  the review ring, and otherwise on the booth page; the landing is built from
+  the ring, never echoed.
+- **Fogging never writes through a link.** booth-dev's `set_booth_blurred` used
+  `touch()`, which followed a planted `.blurbooth` symlink: a click of this
+  control rewrote an outside file's mtime, or created a dangling target. Any
+  entry already at the name reads as fogged, so nothing is written; otherwise
+  the marker is created with `O_CREAT | O_EXCL | O_NOFOLLOW`.
+- **Space never hijacks a focused control.** The review's Space-to-advance
+  ignores a focused button, link or summary, so a keyboard can press these
+  controls.
 - **Its state comes from the server**, never from the client:
   `booth_blurred = is_booth_blurred(booth)` in both contexts. The label says
   what IS, and pressing it flips it.
@@ -235,8 +259,9 @@ reading; this is the control the operator uses, which the blur ruling assumed.
   preview image, the text column, the side column, the pill — is identical
   with the cluster present or removed.
 - **INV-4 — blur honesty (r2 INV-8).** Nothing on the index is revealed by D2.
-- **INV-5 — autoescape.** The booth name reaches the page only as an escaped
-  attribute value.
+- **INV-5 — autoescape.** The booth name reaches the reveal-state machinery
+  only as an escaped attribute value (`data-booth`), read by `getAttribute` and
+  never templated into a script.
 - **INV-6 — no flash.** A forced theme and a set reveal are applied before
   first paint.
 
diff --git a/tests/mutations/r2b.toml b/tests/mutations/r2b.toml
index 5db6d28..877f01d 100644
--- a/tests/mutations/r2b.toml
+++ b/tests/mutations/r2b.toml
@@ -69,9 +69,9 @@ label = "D2 the control shows without JS (server markup not hidden)"
 file = "booth/templates/booth.html"
 test = "tests/test_flow_browser.py::test_reveal_all_never_shows_without_js_and_a_storage_failure_still_applies_the_click"
 old = '''
-  {% if all_items | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all hidden>'''
+  {% if all_items | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all hidden title='''
 new = '''
-  {% if all_items | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all>'''
+  {% if all_items | selectattr('blurred') | list %}<button type="button" class="reveal-all-btn" data-reveal-all title='''
 
 [[mutation]]
 label = "D2 the control is markup even when nothing is blurred"
@@ -137,3 +137,128 @@ old = '''
                 "blurred_self": it.rel in own_blur,'''
 new = '''
                 "blurred_self": it.blurred,'''
+
+# ---- folds: the heid code-review ("BLITZ-2") and bug-hunt ("FENRIR-6") panels on merge 1
+
+[[mutation]]
+label = "a board holding files loses the blur controls its labels point at"
+file = "booth/templates/booth.html"
+test = "tests/test_flow.py::test_a_board_with_files_gets_the_blur_controls_its_labels_point_at"
+old = '''
+  {% if all_items %}
+  {# The fog form IS a region'''
+new = '''
+  {% if not board %}
+  {# The fog form IS a region'''
+
+[[mutation]]
+label = "a blurred doc's own page renders clear"
+file = "booth/templates/doc.html"
+test = "tests/test_flow.py::test_a_blurred_docs_own_page_is_blurred_too"
+old = '''
+  <div class="docbody{% if blurred %} is-blurred{% endif %}" id="docbody">'''
+new = '''
+  <div class="docbody" id="docbody">'''
+
+[[mutation]]
+label = "the review offers Reveal all when only a doc (off the ring) is blurred"
+file = "booth/templates/view.html"
+test = "tests/test_flow.py::test_reveal_all_renders_where_it_can_act"
+old = '''
+    {% if film | selectattr('blurred') | list %}<button'''
+new = '''
+    {% if true %}<button'''
+
+[[mutation]]
+label = "the fog form is a GET (changes nothing with scripts off)"
+file = "booth/templates/booth.html"
+test = "tests/test_flow.py::test_the_booth_blur_toggle_works_without_js_and_lands_back_on_the_review"
+old = '''<form class="blur-all{% if booth_blurred %} is-on{% endif %}" method="post" action="/b/{{ name_url }}/blurbooth">
+    <input type="hidden" name="on" value="{{ '0' if booth_blurred else '1' }}">
+    <button title="{{ 'un-blur the whole booth — per-item'''
+new = '''<form class="blur-all{% if booth_blurred %} is-on{% endif %}" method="get" action="/b/{{ name_url }}/blurbooth">
+    <input type="hidden" name="on" value="{{ '0' if booth_blurred else '1' }}">
+    <button title="{{ 'un-blur the whole booth — per-item'''
+
+[[mutation]]
+label = "the swap stops carrying an item's own reveal"
+file = "booth/templates/base.html"
+test = "tests/test_flow_browser.py::test_an_items_own_reveal_survives_an_in_place_save"
+old = '''
+      ['revealed', 'is-closed'].forEach(function (c) {'''
+new = '''
+      ['is-closed'].forEach(function (c) {'''
+
+[[mutation]]
+label = "a storage READ that throws raises out of the pre-paint script"
+file = "booth/templates/base.html"
+test = "tests/test_flow_browser.py::test_reveal_all_never_shows_without_js_and_a_storage_failure_still_applies_the_click"
+old = '''
+    try {
+      if (b !== null && sessionStorage.getItem('booth.reveal:' + b) === '1') d.classList.add('reveal-all');
+    } catch (e) {}'''
+new = '''
+    if (b !== null && sessionStorage.getItem('booth.reveal:' + b) === '1') d.classList.add('reveal-all');'''
+
+[[mutation]]
+label = "fogging writes through a planted marker link"
+file = "booth/app.py"
+test = "tests/test_flow.py::test_fogging_never_writes_through_a_planted_marker_link"
+old = '''
+        try:
+            os.lstat(marker)
+            return True
+        except FileNotFoundError:
+            pass
+        try:
+            os.close(os.open(marker, os.O_WRONLY | os.O_CREAT | os.O_EXCL | os.O_NOFOLLOW, 0o644))
+        except FileExistsError:
+            pass                                   # lost a race to another fog: still fogged
+        return True'''
+new = '''
+        marker.touch(exist_ok=True)
+        return True'''
+
+[[mutation]]
+label = "the fog landing echoes `back` unchecked"
+file = "booth/app.py"
+test = "tests/test_flow.py::test_the_fog_landing_is_built_from_the_ring_never_echoed"
+old = '''
+        if back and back in review_chain(booth_items(booth)):'''
+new = '''
+        if back:'''
+
+[[mutation]]
+label = "the fog form is outside every region (a swap leaves its label stale)"
+file = "booth/templates/booth.html"
+test = "tests/test_flow.py::test_the_booth_blur_toggle_works_without_js_and_lands_back_on_the_review"
+old = '''
+  <span class="region-wrap" data-region="blur-booth"><form class="blur-all'''
+new = '''
+  <span class="region-wrap"><form class="blur-all'''
+
+[[mutation]]
+label = "Space on a focused review button moves to the next item"
+file = "booth/templates/view.html"
+test = "tests/test_flow_browser.py::test_space_on_a_focused_review_button_presses_it_and_does_not_move_on"
+old = '''e.target !== player && !(e.target.closest && e.target.closest('button, a, summary'))) {'''
+new = '''e.target !== player) {'''
+
+[[mutation]]
+label = "the top-bar controls squeeze into multi-line stacks at phone width"
+file = "booth/templates/base.html"
+test = "tests/test_flow_browser.py::test_the_review_and_doc_top_bars_fit_a_phone"
+old = '''
+  .blur-all button,.reveal-all-btn{white-space:nowrap}
+  @media (max-width:600px){.reveal-all-btn .ra-note{display:none}}'''
+new = '''
+'''
+
+[[mutation]]
+label = "the Desk strip under another booth's reveal is lifted by a whisker (blur(0px) is not blurred)"
+file = "booth/templates/base.html"
+test = "tests/test_flow_browser.py::test_reveal_all_on_booth_a_does_not_reveal_booth_b_or_the_desk"
+old = '''
+  .blurred-thumb{filter:blur(16px)}'''
+new = '''
+  .blurred-thumb{filter:blur(0px)}'''
diff --git a/tests/test_flow.py b/tests/test_flow.py
index 53ad953..5b08121 100644
--- a/tests/test_flow.py
+++ b/tests/test_flow.py
@@ -861,8 +861,10 @@ def test_the_booth_blur_toggle_works_without_js_and_lands_back_on_the_review(tmp
     c = _client(tmp_path)
     page = c.get("/b/g/").text
     form = re.search(r'<form[^>]*action="/b/g/blurbooth".*?</form>', page, re.S).group(0)
+    assert 'method="post"' in form, "a GET form would not change anything with scripts off"
     assert 'name="on" value="1"' in form and "blur booth" in form
-    assert all(form not in r for r in _regions(page)), "a swap must never replace it"
+    # a REGION: its label is server state, so an in-place save refreshes it
+    assert form in _region(page, "blur-booth")
     assert "badge-blur" not in re.search(r'data-booth="g".*?</article>', c.get("/").text, re.S).group(0)
 
     r = c.post("/b/g/blurbooth", data={"on": "1"}, follow_redirects=False)
@@ -876,6 +878,7 @@ def test_the_booth_blur_toggle_works_without_js_and_lands_back_on_the_review(tmp
     view = c.get("/b/g/view?f=b.png").text
     vbar = re.search(r'<div class="vbar">.*?</div>\s*\n', view, re.S).group(0)
     vform = re.search(r'<form[^>]*action="/b/g/blurbooth".*?</form>', vbar, re.S).group(0)
+    assert 'method="post"' in vform
     assert 'name="back" value="b.png"' in vform and 'name="on" value="0"' in vform
     r = c.post("/b/g/blurbooth", data={"on": "0", "back": "b.png"}, follow_redirects=False)
     assert r.headers["location"] == "/b/g/view?f=b.png" and not (b / ".blurbooth").exists()
@@ -918,3 +921,79 @@ def test_under_a_fogged_booth_each_items_blur_control_tells_the_truth(tmp_path):
     assert re.search(r'action="/b/g/blur".*?name="on" value="0".*?◉ blurred', own, re.S)
     assert 'action="/b/g/blur"' not in booth
     assert "◉ booth" in booth
+
+
+
+def test_a_board_with_files_gets_the_blur_controls_its_labels_point_at(tmp_path):
+    """heid code-review (4/4): both booth-wide controls sat inside the board
+    suppression meant for the one-click wipe, so a links board holding a fogged
+    picture showed "◉ booth — un-blur the booth in the header" with no such
+    control in the header. Only the wipe is board-suppressed."""
+    b = _booth(tmp_path, "links", {"links.md": b"- [x](https://example.test/)\n", "a.png": PNG})
+    (b / ".blurbooth").write_bytes(b"")
+    page = _client(tmp_path).get("/b/links/").text
+    assert re.search(r'<form[^>]*action="/b/links/blurbooth"', page)
+    assert re.search(r"<button[^>]*data-reveal-all", page)
+
+
+def test_reveal_all_renders_where_it_can_act(tmp_path):
+    """heid code-review (3/4): the header offers Reveal all when ANY item is
+    blurred; the review only when an item of the review RING is — a blurred doc
+    is not on the review page, so a control there would act on nothing."""
+    from booth.app import set_blurred
+    b = _booth(tmp_path, "g", {"a.png": PNG, "n.md": b"# n"})
+    set_blurred(b, "n.md", True)
+    c = _client(tmp_path)
+    assert re.search(r"<button[^>]*data-reveal-all", c.get("/b/g/").text)
+    assert not re.search(r"<button[^>]*data-reveal-all", c.get("/b/g/view?f=a.png").text)
+
+
+def test_a_blurred_docs_own_page_is_blurred_too(tmp_path):
+    """heid code-review (hulda): the full-page doc view never read `blurred`,
+    so a blurred doc rendered clear at the size where it is most readable.
+    Its body is blurred there too, with its own JS-only reveal."""
+    from booth.app import set_blurred
+    b = _booth(tmp_path, "g", {"n.md": b"# secret", "o.md": b"# open"})
+    set_blurred(b, "n.md", True)
+    c = _client(tmp_path)
+    blurred, clear = c.get("/b/g/view?f=n.md").text, c.get("/b/g/view?f=o.md").text
+    assert re.search(r'class="docbody is-blurred"', blurred)
+    assert re.search(r'<button[^>]*id="docreveal"[^>]*hidden', blurred)
+    assert 'class="docbody"' in clear and not re.search(r'<button[^>]*id="docreveal"', clear)
+
+
+def test_fogging_never_writes_through_a_planted_marker_link(tmp_path):
+    """heid bug-hunt (kimi, hulda): `marker.touch()` followed a planted
+    `.blurbooth` symlink — a click of the new browser control rewrote an
+    outside file's mtime, or CREATED a dangling target. The same class
+    `record_view` was hardened against. A link already there reads as fogged
+    (is_booth_blurred counts it), so fogging has nothing to write."""
+    import os
+    outside = tmp_path / "outside.txt"
+    outside.write_text("x")
+    os.utime(outside, (1_000_000, 1_000_000))
+    b = _booth(tmp_path, "g", {"a.png": PNG})
+    (b / ".blurbooth").symlink_to(outside)
+    h = _booth(tmp_path, "h", {"a.png": PNG})
+    (h / ".blurbooth").symlink_to(tmp_path / "created-by-a-click")
+    c = _client(tmp_path)
+    assert c.post("/b/g/blurbooth", data={"on": "1"}, follow_redirects=False).status_code == 303
+    assert c.post("/b/h/blurbooth", data={"on": "1"}, follow_redirects=False).status_code == 303
+    assert outside.stat().st_mtime == 1_000_000
+    assert not (tmp_path / "created-by-a-click").exists()
+    c.post("/b/g/blurbooth", data={"on": "0"}, follow_redirects=False)
+    assert not (b / ".blurbooth").is_symlink() and outside.exists()     # unlinked, target untouched
+
+
+def test_the_fog_landing_is_built_from_the_ring_never_echoed(tmp_path):
+    """heid bug-hunt (kimi, regin, groa): `back` went into the 303 unchecked, so
+    a stale or foreign value landed on a 404. Like the mark routes' back=view:
+    the review only for an item of the review ring, else the booth page."""
+    _booth(tmp_path, "g", {"a.png": PNG, "n.md": b"# n"})
+    c = _client(tmp_path)
+    loc = lambda back: c.post("/b/g/blurbooth", data={"on": "1", "back": back},
+                              follow_redirects=False).headers["location"]
+    assert loc("a.png") == "/b/g/view?f=a.png"
+    assert loc("gone.png") == "/b/g/"
+    assert loc("n.md") == "/b/g/"
+    assert loc("") == "/b/g/"
diff --git a/tests/test_flow_browser.py b/tests/test_flow_browser.py
index 6362616..bbeb127 100644
--- a/tests/test_flow_browser.py
+++ b/tests/test_flow_browser.py
@@ -618,8 +618,8 @@ def test_reveal_all_on_booth_a_does_not_reveal_booth_b_or_the_desk(browser, live
     desk = page.evaluate("""() => [...document.querySelectorAll('.desk-strip img.blurred-thumb')]
         .map(i => getComputedStyle(i).filter)""")
     page.close()
-    assert "blur" in b_tile, b_tile
-    assert desk and all("blur" in f for f in desk), desk
+    assert b_tile == "blur(22px)", b_tile
+    assert desk and all(f == "blur(16px)" for f in desk), desk     # exact: blur(0px) is not blurred
 
 
 def test_reveal_all_survives_an_in_place_save(browser, live):
@@ -676,11 +676,100 @@ def test_reveal_all_never_shows_without_js_and_a_storage_failure_still_applies_t
     nojs = page.locator("[data-reveal-all]").is_visible()
     ctx.close()
     page = browser.new_page(viewport={"width": 1400, "height": 900})
-    page.add_init_script("Storage.prototype.setItem = function () { throw new Error('quota'); };")
+    errors = []
+    page.on("pageerror", lambda e: errors.append(str(e)))
+    # READS and WRITES both throw: the pre-paint read must degrade to "not
+    # revealed" without raising, and the click must still apply.
+    page.add_init_script("""Storage.prototype.setItem = function () { throw new Error('quota'); };
+                            Storage.prototype.getItem = function () { throw new Error('denied'); };""")
     page.goto(f"{base}/b/g/", wait_until="networkidle")
+    _settle(page)
+    before = page.evaluate(_FILTER, 'figure.item[data-item="a.png"] img')
     page.locator("[data-reveal-all]").click()
     _settle(page)
     lifted = page.evaluate(_FILTER, 'figure.item[data-item="a.png"] img')
     page.close()
     assert not nojs
-    assert lifted == "none", lifted
+    assert before == "blur(22px)" and lifted == "none", (before, lifted)
+    assert errors == [], errors
+
+
+
+def test_an_items_own_reveal_survives_an_in_place_save(browser, live):
+    """heid code-review (groa, kimi): nothing pinned the swap carrying an item's
+    own `revealed` — deleting it from the carry list left every test green.
+    Reveal one tile, save something else in place: it stays revealed, and its
+    button still says so."""
+    base, root = live
+    _blurred_set(root, blur=("a.png", "b.png"), flag=())
+    page = browser.new_page(viewport={"width": 1400, "height": 900})
+    page.goto(f"{base}/b/g/", wait_until="networkidle")
+    page.locator('figure.item[data-item="b.png"] .reveal').click()
+    page.locator('figure.item[data-item="a.png"] .flagtoggle button').click()
+    page.wait_for_selector('figure.item.is-flagged[data-item="a.png"]', timeout=10000)
+    _settle(page)
+    got = [page.evaluate(_FILTER, 'figure.item[data-item="b.png"] img'),
+           page.locator('figure.item[data-item="b.png"] .reveal').inner_text()]
+    page.close()
+    assert got[0] == "none" and "hide" in got[1], got
+
+
+def test_reveal_all_lifts_a_blurred_docs_own_page(browser, live):
+    """The doc page's blur (heid code-review) obeys the same <html> class, and
+    its own reveal works."""
+    from booth.app import set_blurred
+    base, root = live
+    b = root / "g"
+    b.mkdir()
+    (b / "n.md").write_text("# secret\n\nbody")
+    set_blurred(b, "n.md", True)
+    page = browser.new_page(viewport={"width": 1200, "height": 800})
+    page.goto(f"{base}/b/g/view?f=n.md", wait_until="networkidle")
+    _settle(page)
+    at_rest = page.evaluate(_FILTER, "#docbody .markdown-body, #docbody .textview")
+    page.locator("#docreveal").click()
+    _settle(page)
+    own = page.evaluate(_FILTER, "#docbody .markdown-body, #docbody .textview")
+    page.close()
+    assert at_rest == "blur(22px)" and own == "none", (at_rest, own)
+
+
+def test_space_on_a_focused_review_button_presses_it_and_does_not_move_on(browser, live):
+    """heid bug-hunt (hulda): the review's document-level Space handler moved to
+    the next item before a focused button could take the key, so a keyboard
+    user could not press Reveal all or the fog control with Space."""
+    base, root = live
+    _blurred_set(root, flag=())
+    page = browser.new_page(viewport={"width": 1400, "height": 900})
+    page.goto(f"{base}/b/g/view?f=a.png", wait_until="networkidle")
+    page.locator("[data-reveal-all]").focus()
+    page.keyboard.press(" ")
+    _settle(page)
+    got = [page.url, page.evaluate("document.documentElement.classList.contains('reveal-all')")]
+    page.close()
+    assert got[0].endswith("/b/g/view?f=a.png") and got[1], got
+
+
+def test_the_review_and_doc_top_bars_fit_a_phone(browser, live):
+    """heid bug-hunt (hulda, groa; needs-repro): the top bar gained the fog
+    control and Reveal all beside the name, the fit toggle and the download.
+    At 390px no review or doc page scrolls sideways, even with a long name."""
+    from booth.app import set_blurred
+    base, root = live
+    b = _blurred_set(root, flag=())
+    long = "a-rather-long-picture-name-" * 3 + ".png"
+    (b / long).write_bytes(PNG)
+    set_blurred(b, long, True)
+    (b / "n.md").write_text("# n")
+    set_blurred(b, "n.md", True)
+    over = {}
+    for url in (f"/b/g/view?f={long}", "/b/g/view?f=n.md"):
+        page = browser.new_page(viewport={"width": 390, "height": 844})
+        page.goto(f"{base}{url}", wait_until="networkidle")
+        over[url] = page.evaluate(
+            "document.documentElement.scrollWidth - document.documentElement.clientWidth")
+        # and nothing squeezed into a stack: every top-bar control is one line
+        over[url + " tallest"] = page.evaluate("""() => Math.max(...[...document.querySelectorAll(
+            '.vbar button, .vbar .vbtn')].filter(e => e.offsetParent).map(e => e.getBoundingClientRect().height)) - 40""")
+        page.close()
+    assert all(v <= 0 for v in over.values()), over