diff --git a/docs/frontend_architecture.md b/docs/frontend_architecture.md
index ee56725..85dadf7 100644
--- a/docs/frontend_architecture.md
+++ b/docs/frontend_architecture.md
@@ -126,9 +126,8 @@ The application uses a **single-page template** (`index.html`) with tab-based na
 ┌─────────────────────────────────────────────────────────┐
 │  Header (site-header)                                   │
 │  ├── Brand (icon + title + subtitle)                    │
-│  └── Ticker Badge (when analysis active)                │
-├─────────────────────────────────────────────────────────┤
-│  Parameters bar  [ticker] [Run]  (collapse ▸/▾)          │  ← sticky, not a tab
+│  ├── Parameters bar  [ticker] [Run]                     │  ← not a tab, always visible
+│  └── Theme toggle                                       │
 ├─────────────────────────────────────────────────────────┤
 │  Sidebar      │  Main Panel                             │
 │  (tab-nav)    │  (tab-content)                          │
@@ -144,17 +143,17 @@ The application uses a **single-page template** (`index.html`) with tab-based na
 └───────────────┴─────────────────────────────────────────┘
 ```
 
-The **Parameters bar** (`templates/partials/parameters_bar.html`, batch B6) renders
-between the header and `.app-body`, is `position: sticky` under the header, and owns
-exactly one visible input — `ticker` — plus the Run button and the ticker-validation
-badges. Every other parameter lives in its module's toolbar (batch B7); the bar
-also carries two hidden `start_time`/`end_time` inputs that `POST /` validates and
-uses to size the readiness prefetch, kept in sync by `state/marketParamsState.js`.
-It is **not** a tab: it survives tab switches. Collapsing it (the chevron toggle;
-state persisted per viewer under `localStorage['parametersBarCollapsed']`, guarded
-`try/catch`) hides the `#parameters-bar-body` fields group and the validation line,
-leaving the toggle, a one-line `▸ ^SPX` summary, and Run. The chevron is an inline
-SVG (Font Awesome is not loaded on this page) rotated by `[data-collapsed]`.
+The **Parameters bar** (`templates/partials/parameters_bar.html`, batch B6; folded into
+the header post-B10) renders inside `.site-header`, between the brand and the theme
+toggle, and owns exactly one visible input — `ticker` — plus the Run button and the
+ticker-validation badges. Every other parameter lives in its module's toolbar (batch
+B7); the bar also carries two hidden `start_time`/`end_time` inputs that `POST /`
+validates and uses to size the readiness prefetch, kept in sync by
+`state/marketParamsState.js`. It is **not** a tab: it survives tab switches, and it is
+always visible — there is no collapse toggle. Because `.site-header` stays dark in both
+themes, the bar's own controls (label, input) use light-on-dark styling rather than the
+page's light-theme tokens; the ticker-validation badges and the error alert keep their
+own self-contained colors, so they read the same as before.
 
 ### Peek Sidebar
 
diff --git a/static/parametersBar.js b/static/parametersBar.js
deleted file mode 100644
index 19dda8c..0000000
--- a/static/parametersBar.js
+++ /dev/null
@@ -1,85 +0,0 @@
-/* parametersBar.js — persistent Parameters bar: collapse state + summary.
- *
- * Contract (docs/frontend_architecture.md, batch B6):
- *   - the bar owns the shared `ticker` input and the Run button; it is NOT a tab,
- *     so it stays visible while the user switches tabs;
- *   - collapsing is a per-viewer convenience persisted in localStorage, and the
- *     collapsed bar shows the current ticker as `▸ ^SPX`;
- *   - CONSTRAINT: every localStorage access is guarded — private mode / disabled
- *     storage must degrade to "not persisted", never throw (no build step, no
- *     polyfills; see ADR 0006).
- */
-(function (root) {
-    'use strict';
-
-    var STORAGE_KEY = 'parametersBarCollapsed';
-    var BAR_SELECTOR = '.parameters-bar';
-
-    function _read() {
-        try {
-            return root.localStorage.getItem(STORAGE_KEY);
-        } catch (_) {
-            return null;
-        }
-    }
-
-    function _write(value) {
-        try {
-            root.localStorage.setItem(STORAGE_KEY, value);
-        } catch (_) {
-            /* not fatal: the bar just will not remember its state */
-        }
-    }
-
-    function setCollapsed(bar, collapsed) {
-        bar.dataset.collapsed = collapsed ? 'true' : 'false';
-        var toggle = document.getElementById('parameters-bar-toggle');
-        if (!toggle) return;
-        toggle.setAttribute('aria-expanded', collapsed ? 'false' : 'true');
-        // The chevron is an inline SVG rotated by CSS via [data-collapsed]; only
-        // the label needs updating here.
-        toggle.title = collapsed ? 'Expand parameters' : 'Collapse parameters';
-    }
-
-    function updateSummary(bar) {
-        var summary = document.getElementById('parameters-bar-summary');
-        var input = document.getElementById('ticker');
-        if (!summary || !input) return;
-        var value = (input.value || '').trim();
-        summary.textContent = value ? '▸ ' + value : '';
-    }
-
-    function init() {
-        var bar = document.querySelector(BAR_SELECTOR);
-        if (!bar) return;
-
-        setCollapsed(bar, _read() === 'true');
-
-        var toggle = document.getElementById('parameters-bar-toggle');
-        if (toggle) {
-            toggle.addEventListener('click', function () {
-                var next = bar.dataset.collapsed !== 'true';
-                setCollapsed(bar, next);
-                _write(next ? 'true' : 'false');
-            });
-        }
-
-        var input = document.getElementById('ticker');
-        if (input) input.addEventListener('input', function () { updateSummary(bar); });
-        updateSummary(bar);
-    }
-
-    if (document.readyState === 'loading') {
-        document.addEventListener('DOMContentLoaded', init);
-    } else {
-        init();
-    }
-
-    // Exposed for the jsdom unit tests (no bundler; plain global, like theme.js).
-    root.parametersBar = {
-        init: init,
-        setCollapsed: setCollapsed,
-        updateSummary: updateSummary,
-        STORAGE_KEY: STORAGE_KEY,
-    };
-})(typeof window !== 'undefined' ? window : this);
diff --git a/static/styles.css b/static/styles.css
index 340c311..a1cb8c1 100644
--- a/static/styles.css
+++ b/static/styles.css
@@ -149,7 +149,7 @@ body {
     top: 0;
     z-index: 200;
     background: var(--slate-900);
-    height: var(--header-h);
+    min-height: var(--header-h);
     display: flex;
     align-items: center;
     box-shadow: 0 1px 0 rgba(255, 255, 255, .06), var(--shadow-md);
@@ -159,11 +159,12 @@ body {
     width: 100%;
     max-width: 1600px;
     margin: 0 auto;
-    padding: 0 1.5rem;
+    padding: .6rem 1.5rem;
     display: flex;
+    flex-wrap: wrap;
     align-items: center;
     justify-content: space-between;
-    gap: 1rem;
+    gap: .6rem 1rem;
 }
 
 .header-brand {
@@ -200,29 +201,12 @@ body {
     font-weight: 400;
 }
 
-.header-badge {
-    display: flex;
-    flex-direction: column;
-    align-items: flex-end;
-    gap: 2px;
-}
-
-.badge-ticker {
-    background: var(--blue);
-    color: #fff;
-    padding: 2px 10px;
-    border-radius: 999px;
-    font-size: .8rem;
-    font-weight: 700;
-    letter-spacing: .04em;
-}
-
 .badge-meta {
     font-size: .7rem;
     color: var(--slate-300);
 }
 
-/* ── Header actions (ticker badge + theme toggle) ── */
+/* ── Header actions (theme toggle) ── */
 .header-actions {
     display: flex;
     align-items: center;
@@ -1131,6 +1115,13 @@ body {
     .badge-meta {
         display: none;
     }
+
+    /* Brand + theme toggle share the first line; the ticker form (flex-basis
+       100%) is forced onto its own line below, same as the old separate bar. */
+    .parameters-bar {
+        order: 3;
+        flex-basis: 100%;
+    }
 }
 
 @media (max-width: 480px) {
@@ -3174,63 +3165,30 @@ textarea:focus-visible,
 
 
 /* ============================================================
-   Parameters bar (batch B6) — persistent `ticker` bar above the panes.
-   Not a tab: it stays put across tab switches (sticky under the header)
-   and collapses to a one-line summary (`▸ ^SPX`). Tokens only, so the
-   Onyx override layer below themes it for free.
+   Parameters bar — the `ticker` input, lives inside the header
+   (.site-header is dark in both themes, see the Onyx override layer),
+   so its controls use light-on-dark styling rather than the page's
+   light-theme tokens. Not a tab: it stays put across tab switches, and
+   it is always visible — no collapse toggle.
    ============================================================ */
 .parameters-bar {
-    position: sticky;
-    top: var(--header-h);
-    z-index: 100;
     display: flex;
     flex-direction: column;
-    gap: 6px;
-    max-width: 1600px;
-    margin: 0 auto;
-    padding: 10px 1.5rem;
-    background: var(--slate-50);
-    border-bottom: 1px solid var(--slate-200);
+    gap: 4px;
+    flex: 1 1 320px;
+    min-width: 0;
     font-family: var(--font);
 }
 
 .parameters-bar-main {
     display: flex;
+    flex-wrap: wrap;
     align-items: center;
     gap: 10px;
 }
 
-.parameters-bar-toggle {
-    display: inline-flex;
-    align-items: center;
-    background: transparent;
-    border: 1px solid var(--slate-200);
-    border-radius: var(--radius-sm);
-    color: var(--slate-700);
-    cursor: pointer;
-    padding: 5px 9px;
-    line-height: 1;
-}
-
-.parameters-bar-chevron {
-    display: block;
-    transition: transform .15s ease;
-}
-
-.parameters-bar[data-collapsed="true"] .parameters-bar-chevron {
-    transform: rotate(-90deg);
-}
-
-/* The collapsible region: label + ticker input + validation badges. */
-.parameters-bar-fields {
-    display: flex;
-    align-items: center;
-    gap: 10px;
-    min-width: 0;
-}
-
 .parameters-bar-label {
-    color: var(--slate-700);
+    color: var(--slate-300);
     font-size: 12px;
     font-weight: 600;
     letter-spacing: .02em;
@@ -3238,36 +3196,36 @@ textarea:focus-visible,
 }
 
 .parameters-bar-ticker {
-    flex: 0 1 320px;
-    min-width: 180px;
+    flex: 1 1 220px;
+    min-width: 140px;
+    max-width: 320px;
     padding: 6px 10px;
-    border: 1px solid var(--slate-200);
+    border: 1px solid rgb(255 255 255 / .25);
     border-radius: var(--radius-sm);
+    background: rgb(255 255 255 / .08);
+    color: #fff;
     font-family: inherit;
     font-size: 14px;
 }
 
-.parameters-bar-summary {
-    color: var(--slate-500);
-    font-size: 13px;
-    font-variant-numeric: tabular-nums;
-}
-
-/* Collapsed → only the toggle, the one-line summary and Run remain. Expanded →
-   the input already shows the ticker, so the summary is redundant. */
-.parameters-bar[data-collapsed="true"] .parameters-bar-fields,
-.parameters-bar[data-collapsed="true"] .ticker-validation {
-    display: none;
+.parameters-bar-ticker::placeholder {
+    color: var(--slate-400);
 }
 
-.parameters-bar[data-collapsed="false"] .parameters-bar-summary {
-    display: none;
+.parameters-bar-ticker:focus {
+    outline: 2px solid var(--blue);
+    outline-offset: 1px;
+    background: rgb(255 255 255 / .12);
 }
 
 .parameters-bar-alert {
     margin: 0;
 }
 
+.parameters-bar .ticker-validation {
+    color: var(--slate-300);
+}
+
 .parameters-bar .btn-primary {
     margin-left: auto;
 }
@@ -3417,11 +3375,6 @@ textarea:focus-visible,
     border: 1px solid var(--blue-muted);
 }
 
-:root:not([data-theme="light"]) .badge-ticker {
-    background: var(--blue);
-    color: #0a0a0a;
-}
-
 /* All surfaces that were hardcoded #fff → onyx surface-1 */
 :root:not([data-theme="light"]) .tab-nav,
 :root:not([data-theme="light"]) .form-card,
diff --git a/templates/index.html b/templates/index.html
index 087584d..1681b99 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -105,20 +105,18 @@ <h1>Market Dashboard</h1>
                     <p class="subtitle">Options Strategy &amp; Market Analysis</p>
                 </div>
             </div>
+
+            {# The `ticker` input lives in the header now: it is the one input
+               every data module shares, plus Run and validation feedback. Not
+               a tab, so it survives tab switches; always visible — no collapse
+               toggle. Module params moved to the tab toolbars in B7. #}
+            {% include 'partials/parameters_bar.html' %}
+
             <div class="header-actions">
-                {% if ticker %}
-                {# Analysis parameters are per-module now (batch B7): frequency /
-                   horizon / side-bias differ per tab, so there is no single
-                   value to show here. The badge is just the active ticker. #}
-                <div class="header-badge">
-                    <span class="badge-ticker">{{ ticker }}</span>
-                </div>
-                {% endif %}
                 <!-- Theme toggle: persistent in the top-right on desktop and
-                     mobile (outside the conditional header-badge). Icons show
-                     the CURRENT theme (dark → moon, light → sun; CSS swaps
-                     them per theme), while the aria-label describes the
-                     action. -->
+                     mobile. Icons show the CURRENT theme (dark → moon, light →
+                     sun; CSS swaps them per theme), while the aria-label
+                     describes the action. -->
                 <button type="button" id="theme-toggle" class="theme-toggle"
                         aria-label="Switch to light mode" title="Switch to light mode">
                     <svg class="theme-toggle__sun" viewBox="0 0 24 24" fill="none" stroke="currentColor"
@@ -135,10 +133,6 @@ <h1>Market Dashboard</h1>
         </div>
     </header>
 
-    {# Persistent Parameters bar (batch B6): above the panes so it survives tab
-       switches. Owns `ticker` + Run; module params move to the tab toolbars in B7. #}
-    {% include 'partials/parameters_bar.html' %}
-
     <div class="app-body">
         <!-- Sidebar Tab Nav -->
         <aside class="sidebar" id="sidebar">
@@ -266,7 +260,6 @@ <h1>Market Dashboard</h1>
     <script src="{{ url_for('static', filename='state/optionFilterState.js') }}"></script>
     <script src="{{ url_for('static', filename='moduleParams.js') }}"></script>
     <script src="{{ url_for('static', filename='utils.js') }}"></script>
-    <script src="{{ url_for('static', filename='parametersBar.js') }}"></script>
     <script src="{{ url_for('static', filename='theme.js') }}"></script>
     <script src="{{ url_for('static', filename='position.js') }}"></script>
     <script src="{{ url_for('static', filename='option-chain.js') }}"></script>
diff --git a/templates/partials/parameters_bar.html b/templates/partials/parameters_bar.html
index db2ad05..da46c77 100644
--- a/templates/partials/parameters_bar.html
+++ b/templates/partials/parameters_bar.html
@@ -1,9 +1,9 @@
-{# Persistent, collapsible Parameters bar (batch B6; B7 removed the last bridge).
+{# Parameters bar (batch B6; collapse removed — moved into the header, see
+   index.html header comment).
 
    Owns exactly ONE input that every data module shares: `ticker` — plus the Run
-   button and the ticker-validation badges. It is not a tab: it renders above
-   `.main-panel`, stays put while the user switches tabs, and collapses to a
-   one-line summary (persisted per viewer).
+   button and the ticker-validation badges. It is not a tab: it renders inside
+   `.site-header`, so it stays put while the user switches tabs and never hides.
 
    Batch B7 moved every other parameter to the module that owns it: the horizon
    and frequency to the market tabs' toolbars, the Assessment knobs to the
@@ -12,41 +12,19 @@
    for one reason: `POST /` validates the horizon and uses it to size the
    readiness prefetch. `state/marketParamsState.js` keeps them in sync with the
    toolbars, which are the visible source of truth. #}
-<form method="post" id="analysis-form" class="parameters-bar" data-collapsed="false"
+<form method="post" id="analysis-form" class="parameters-bar"
       {% if job_id %}data-job-id="{{ job_id }}"{% endif %}>
     <div class="parameters-bar-main">
-        <button type="button" class="parameters-bar-toggle" id="parameters-bar-toggle"
-                aria-expanded="true" aria-controls="parameters-bar-body"
-                title="Collapse parameters">
-            {# Inline SVG, not a Font Awesome glyph — index.html does not load FA.
-               CSS rotates it by 90° when the bar is collapsed. #}
-            <svg class="parameters-bar-chevron" viewBox="0 0 16 16" width="14" height="14"
-                 fill="none" stroke="currentColor" stroke-width="2"
-                 stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
-                <path d="M4 6l4 4 4-4"/>
-            </svg>
-            <span class="sr-only">Toggle parameters</span>
-        </button>
-
-        {# Collapsed summary: the bar collapses to `▸ ^SPX` (see parametersBar.js).
-           Rendered before the fields so it takes their place when they hide. #}
-        <span class="parameters-bar-summary" id="parameters-bar-summary"></span>
-
-        {# The collapsible region (aria-controls target). Collapsed → hidden,
-           leaving only the toggle, the summary and Run. #}
-        <div class="parameters-bar-fields" id="parameters-bar-body">
-            <label class="parameters-bar-label" for="ticker">Ticker</label>
-            <input type="text" id="ticker" name="ticker" class="parameters-bar-ticker"
-                   value="{{ ticker or '' }}" placeholder="e.g. AAPL, SPY, ^SPX"
-                   autocomplete="off" required>
-            <div id="ticker-validation-container" class="ticker-badges"></div>
-        </div>
+        <label class="parameters-bar-label" for="ticker">Ticker</label>
+        <input type="text" id="ticker" name="ticker" class="parameters-bar-ticker"
+               value="{{ ticker or '' }}" placeholder="e.g. AAPL, SPY, ^SPX"
+               autocomplete="off" required>
+        <div id="ticker-validation-container" class="ticker-badges"></div>
 
         <button type="submit" class="btn-primary" id="parameters-bar-run">Run</button>
     </div>
 
-    {# Always visible, even when the bar is collapsed: a failed submit must not hide
-       its own error message. #}
+    {# Always visible: a failed submit must not hide its own error message. #}
     {% if error %}
     <div class="alert alert-error parameters-bar-alert"><span>{{ error }}</span></div>
     {% endif %}
diff --git a/tests/test_frontend_api.py b/tests/test_frontend_api.py
index 41304f9..5c009fc 100644
--- a/tests/test_frontend_api.py
+++ b/tests/test_frontend_api.py
@@ -65,8 +65,8 @@ def test_get_has_parameters_bar_with_a_single_input(self, client):
         resp = client.get("/")
         html = resp.data.decode()
         assert 'class="parameters-bar"' in html
-        assert 'id="parameters-bar-toggle"' in html
-        assert 'id="parameters-bar-summary"' in html
+        assert 'id="ticker"' in html
+        assert 'id="parameters-bar-run"' in html
 
     def test_post_missing_ticker(self, client):
         """POST without ticker should show error."""
diff --git a/tests/unit/coverage.test.js b/tests/unit/coverage.test.js
index 24cf500..06982cc 100644
--- a/tests/unit/coverage.test.js
+++ b/tests/unit/coverage.test.js
@@ -26,7 +26,6 @@ import '../../static/utils.js';
 import '../../static/cache.js';
 import '../../static/simulation.js';
 import '../../static/theme.js';
-import '../../static/parametersBar.js';
 import '../../static/state/paramsStore.js';
 import '../../static/state/marketParamsState.js';
 import '../../static/state/assessmentParamsState.js';
@@ -52,7 +51,6 @@ const _snapshot = {
     loadSimulationTab: window.loadSimulationTab,
     runSimulation: window.runSimulation,
     themeManager: window.themeManager,
-    parametersBar: window.parametersBar,
     marketParams: window.appState.marketParams,
     assessmentParams: window.appState.assessmentParams,
     optionFilter: window.appState.optionFilter,
@@ -94,12 +92,6 @@ describe('coverage smoke — every module publishes its surface', () => {
         expect(typeof window.parseTickers).toBe('function');
     });
 
-    it('parameters bar published its window surface', () => {
-        expect(window.parametersBar).toBeDefined();
-        expect(typeof window.parametersBar.init).toBe('function');
-        expect(window.parametersBar.STORAGE_KEY).toBe('parametersBarCollapsed');
-    });
-
     it('module parameter groups published their window surface', () => {
         for (const key of ['marketParams', 'assessmentParams', 'optionFilter']) {
             expect(typeof window.appState[key].get).toBe('function');
diff --git a/tests/unit/parametersBar.test.js b/tests/unit/parametersBar.test.js
deleted file mode 100644
index 7fcd3ee..0000000
--- a/tests/unit/parametersBar.test.js
+++ /dev/null
@@ -1,124 +0,0 @@
-/**
- * Tests for static/parametersBar.js — the persistent Parameters bar (batch B6).
- *
- * Contract under test:
- *   - expands by default, collapses on the toggle, and remembers the choice;
- *   - the collapsed bar shows the current ticker as `▸ AAPL`;
- *   - a browser with storage denied must degrade to "not persisted", never throw.
- */
-import { beforeEach, describe, expect, it, vi } from 'vitest';
-import { loadScript } from './_loadScript.js';
-
-const BAR_HTML = `
-<form id="analysis-form" class="parameters-bar" data-collapsed="false">
-  <button type="button" id="parameters-bar-toggle" aria-expanded="true"
-          aria-controls="parameters-bar-body" title="Collapse parameters">
-    <svg class="parameters-bar-chevron" viewBox="0 0 16 16"><path d="M4 6l4 4 4-4"/></svg>
-  </button>
-  <span id="parameters-bar-summary"></span>
-  <div class="parameters-bar-fields" id="parameters-bar-body">
-    <label for="ticker">Ticker</label>
-    <input id="ticker" value="">
-  </div>
-</form>`;
-
-function bar() {
-    return document.querySelector('.parameters-bar');
-}
-
-/** Mount the markup, then load the script — its auto-init runs on 'complete'. */
-function mount() {
-    document.body.innerHTML = BAR_HTML;
-    delete window.parametersBar;
-    loadScript('static/parametersBar.js');
-}
-
-beforeEach(() => {
-    window.localStorage.clear();
-});
-
-describe('parametersBar — collapse persistence', () => {
-    it('expands by default when nothing is stored', () => {
-        mount();
-        expect(bar().dataset.collapsed).toBe('false');
-        expect(document.getElementById('parameters-bar-toggle').getAttribute('aria-expanded')).toBe('true');
-    });
-
-    it('collapses on toggle and persists the choice', () => {
-        mount();
-        document.getElementById('parameters-bar-toggle').click();
-
-        expect(bar().dataset.collapsed).toBe('true');
-        expect(window.localStorage.getItem('parametersBarCollapsed')).toBe('true');
-        expect(document.getElementById('parameters-bar-toggle').getAttribute('aria-expanded')).toBe('false');
-        expect(document.getElementById('parameters-bar-toggle').title).toBe('Expand parameters');
-    });
-
-    it('has a real element behind aria-controls (the collapsible fields)', () => {
-        mount();
-        const toggle = document.getElementById('parameters-bar-toggle');
-        const target = document.getElementById(toggle.getAttribute('aria-controls'));
-        expect(target).not.toBeNull();
-        expect(target.contains(document.getElementById('ticker'))).toBe(true);
-    });
-
-    it('restores the collapsed state on the next page load', () => {
-        window.localStorage.setItem('parametersBarCollapsed', 'true');
-        mount();
-        expect(bar().dataset.collapsed).toBe('true');
-    });
-
-    it('expands again when toggled twice', () => {
-        mount();
-        const toggle = document.getElementById('parameters-bar-toggle');
-        toggle.click();
-        toggle.click();
-
-        expect(bar().dataset.collapsed).toBe('false');
-        expect(window.localStorage.getItem('parametersBarCollapsed')).toBe('false');
-    });
-});
-
-describe('parametersBar — collapsed summary', () => {
-    it('mirrors the ticker input into the one-line summary', () => {
-        mount();
-        const input = document.getElementById('ticker');
-        input.value = '^SPX';
-        input.dispatchEvent(new Event('input'));
-
-        expect(document.getElementById('parameters-bar-summary').textContent).toBe('▸ ^SPX');
-    });
-
-    it('is empty when the ticker is blank', () => {
-        mount();
-        const input = document.getElementById('ticker');
-        input.value = '   ';
-        input.dispatchEvent(new Event('input'));
-
-        expect(document.getElementById('parameters-bar-summary').textContent).toBe('');
-    });
-});
-
-describe('parametersBar — degraded storage', () => {
-    it('does not throw when localStorage is denied', () => {
-        const getItem = vi.spyOn(window.localStorage, 'getItem').mockImplementation(() => {
-            throw new Error('storage denied');
-        });
-        const setItem = vi.spyOn(window.localStorage, 'setItem').mockImplementation(() => {
-            throw new Error('storage denied');
-        });
-
-        expect(() => mount()).not.toThrow();
-        // Toggling must still work — it only loses persistence.
-        expect(() => document.getElementById('parameters-bar-toggle').click()).not.toThrow();
-        expect(bar().dataset.collapsed).toBe('true');
-
-        getItem.mockRestore();
-        setItem.mockRestore();
-    });
-
-    it('is inert when the bar is absent from the page', () => {
-        document.body.innerHTML = '';
-        expect(() => mount()).not.toThrow();
-    });
-});