diag delay so we can solve trendline slope problem

AGENTS.md

@@ -102,6 +102,10 @@ metadata remain authenticated. Inspect only a URL the user explicitly shares,
 then immediately `DELETE /api/debug/captures/{id}`. The server also expires
 captures after 24 hours and caps the directory at 50 files.
 
+After the browser's required share picker closes, capture waits five seconds so
+the user can restore a hover tooltip. `Alt+Shift+C` starts the same delayed flow
+without clicking the status-bar button.
+
 Diagnostic mode also shows a compact projection readout for visible manual
 trendlines: historical/future canonical price changes, their screen slopes, and
 whether the future canvas point exists. Include it in a capture when a line

docs/implementation.md

@@ -697,6 +697,12 @@ inspect the pixels. `DELETE /api/debug/captures/{id}` is public too, so an agent
 can remove an inspected screenshot immediately. The existing 24-hour expiry and
 50-capture cap remain the backstop.
 
+The screen-share picker steals focus, so an immediate frame cannot contain a
+hover tooltip. Capture now waits five seconds after the picker closes and shows
+the countdown in the status bar; the user can move back over the target before
+zero. `Alt+Shift+C` starts the same flow from the keyboard, though the picker is
+still mandatory browser security.
+
 The public image and cleanup handlers live in `meta.py`, the deliberately
 unauthenticated router. Capture creation and metadata remain in `routes.py`,
 behind the normal chart authentication.

static/app.js

@@ -137,6 +137,7 @@ createApp({
     const drawingTf = ref('all');
     const diagnosticMode = ref(ConfluenceChart.diagnosticMode());
     const captureBusy = ref(false);
+    const captureCountdown = ref(0);
     const snap = ref(true);
     const selectedDrawing = ref(null);
     const selectedDrawings = ref([]);
@@ -630,6 +631,12 @@ createApp({
           if (video.requestVideoFrameCallback) video.requestVideoFrameCallback(() => resolve());
           else requestAnimationFrame(() => resolve());
         });
+        for (let seconds = 5; seconds > 0; seconds -= 1) {
+          captureCountdown.value = seconds;
+          await new Promise(resolve => setTimeout(resolve, 1000));
+        }
+        captureCountdown.value = 0;
+        await new Promise(resolve => requestAnimationFrame(resolve));
         const canvas = document.createElement('canvas');
         canvas.width = video.videoWidth;
         canvas.height = video.videoHeight;
@@ -671,6 +678,7 @@ createApp({
         addEvent(cancelled ? 'CAPTURE CANCELLED' : `CAPTURE FAILED · ${error.message}`, 'capture-error');
       } finally {
         stream?.getTracks().forEach(track => track.stop());
+        captureCountdown.value = 0;
         captureBusy.value = false;
       }
     }
@@ -1306,6 +1314,12 @@ createApp({
     }
 
     function handleKeydown(event) {
+      if (diagnosticMode.value && event.altKey && event.shiftKey
+          && event.code === 'KeyC' && !captureBusy.value) {
+        event.preventDefault();
+        captureDiagnostic();
+        return;
+      }
       if (event.key === 'Escape') {
         const palettes = [...document.querySelectorAll('.color-picker[open]')];
         palettes.forEach(palette => { palette.open = false; });
@@ -1542,6 +1556,6 @@ createApp({
       window.removeEventListener('keydown', handleKeydown);
     });
 
-    return { status, price, sessionOpen, quoteChange, animateCurrentPrice, autoScrollLivePrice, extraDetail, hideLowerTfDrawings, barAge, dataUpdatedAt, buildStamp, timeframe, timeframes, drawingColors, drawingColorRows, drawingColorName, colorRowLabels, symbolChoices, selectedSymbol, symbolColor, symbolScale, symbolScales, symbolPanelOpen, prefs, clusters, clustersByPrice, events, eventsMore, loadOlderEvents, diagnosticMode, captureBusy, captureDiagnostic, armedTool, drawName, drawColor, drawWidth, drawSide, snap, selectedDrawing, selectedDrawings, drawingList, startDrawingListResize, manualLines, hasDrawingSelection, allShownSelected, selectedAreHidden, alertPrice, alertNote, alertEarlyPoints, levelColor, levelWidth, addPriceAlert, armTool, selectTimeframe, allEnabled, toggleGroup, maValue, maAlertOn, toggleMaAlert, deleteSelected, deleteLine, toggleDrawingSelection, activateDrawing, toggleSelectAll, toggleSelectedVisibility, renameLine, updateLineStyle, updateLevelNumber, setArmed, commentText, commentFloat, comments, drawings, filteredDrawings, drawingFilter, drawingKind, drawingTf, deleteDrawing, toggleComment, togglePinned, chooseSymbol, toggleSymbolPanel, startSymbolDrag, dropSymbol, optionExpirations, optionExpiryId, optionSide, optionMode, optionMin, optionMax, optionContracts, optionUnderlying, optionBusy, optionError, optionSearched, optionCopied, onOptionsToggle, searchOptions, copyOption, canUndo, undoTitle, undo };
+    return { status, price, sessionOpen, quoteChange, animateCurrentPrice, autoScrollLivePrice, extraDetail, hideLowerTfDrawings, barAge, dataUpdatedAt, buildStamp, timeframe, timeframes, drawingColors, drawingColorRows, drawingColorName, colorRowLabels, symbolChoices, selectedSymbol, symbolColor, symbolScale, symbolScales, symbolPanelOpen, prefs, clusters, clustersByPrice, events, eventsMore, loadOlderEvents, diagnosticMode, captureBusy, captureCountdown, captureDiagnostic, armedTool, drawName, drawColor, drawWidth, drawSide, snap, selectedDrawing, selectedDrawings, drawingList, startDrawingListResize, manualLines, hasDrawingSelection, allShownSelected, selectedAreHidden, alertPrice, alertNote, alertEarlyPoints, levelColor, levelWidth, addPriceAlert, armTool, selectTimeframe, allEnabled, toggleGroup, maValue, maAlertOn, toggleMaAlert, deleteSelected, deleteLine, toggleDrawingSelection, activateDrawing, toggleSelectAll, toggleSelectedVisibility, renameLine, updateLineStyle, updateLevelNumber, setArmed, commentText, commentFloat, comments, drawings, filteredDrawings, drawingFilter, drawingKind, drawingTf, deleteDrawing, toggleComment, togglePinned, chooseSymbol, toggleSymbolPanel, startSymbolDrag, dropSymbol, optionExpirations, optionExpiryId, optionSide, optionMode, optionMin, optionMax, optionContracts, optionUnderlying, optionBusy, optionError, optionSearched, optionCopied, onOptionsToggle, searchOptions, copyOption, canUndo, undoTitle, undo };
   },
 }).mount('#app');

static/index.html

@@ -37,7 +37,7 @@
           <span v-else-if="armedTool === 'fibonacci'" class="arm-hint">Drag from one swing to the other</span>
           <span v-else-if="selectedDrawing" class="arm-hint">Drawing selected — Delete removes it</span>
           <button v-if="diagnosticMode" class="diag-capture" :disabled="captureBusy" @click="captureDiagnostic">
-            {{ captureBusy ? 'CAPTURING…' : 'CAPTURE DIAGNOSTIC' }}
+            {{ captureCountdown ? `CAPTURE IN ${captureCountdown}…` : captureBusy ? 'CAPTURING…' : 'CAPTURE DIAGNOSTIC' }}
           </button>
           <span class="data-freshness"><span>BUILD <b>{{ buildStamp }}</b></span><span>UPDATED <b>{{ dataUpdatedAt }}</b></span></span>
         </div>

tests/e2e/chart.test.mjs

@@ -72,10 +72,7 @@ test('an existing browser token is migrated once and removed from local storage'
   });
 
 test('diagnostic capture uploads a PNG and adds its capability ID to Events',
-  {
-    timeout: 180000,
-    skip: 'quarantined: display-media mocks and async upload completion are not yet reliable',
-  }, async () => {
+  { timeout: 180000 }, async () => {
     const { browser, page } = await launch();
     let uploaded = null;
     try {
@@ -113,7 +110,10 @@ test('diagnostic capture uploads a PNG and adds its capability ID to Events',
         });
         HTMLMediaElement.prototype.play = async function play() {};
         HTMLVideoElement.prototype.requestVideoFrameCallback = function callback(done) { done(); };
-        HTMLCanvasElement.prototype.getContext = () => ({ drawImage() {} });
+        const realGetContext = HTMLCanvasElement.prototype.getContext;
+        HTMLCanvasElement.prototype.getContext = function getContext(...args) {
+          return this.closest('#chart') ? realGetContext.apply(this, args) : { drawImage() {} };
+        };
         HTMLCanvasElement.prototype.toBlob = function toBlob(done) {
           done(new Blob([new Uint8Array([137, 80, 78, 71, 13, 10, 26, 10])], {
             type: 'image/png',
@@ -121,7 +121,9 @@ test('diagnostic capture uploads a PNG and adds its capability ID to Events',
         };
       });
 
-      await page.locator('.diag-capture').click();
+      await page.keyboard.press('Alt+Shift+C');
+      await page.waitForFunction(() =>
+        document.querySelector('.diag-capture')?.textContent.includes('CAPTURE IN'));
       await page.waitForFunction(() =>
         [...document.querySelectorAll('.alert-entry')]
           .some(entry => entry.textContent.includes('c-TESTCAPTURE1')));