tooltip + ots page polish

block-overview tooltip: my prior fix added a 220 px-tall content cell
under 'Digital Artifacts' for OTS commits, which overflowed the
tooltip layout (screenshot showed the OTS subtitle rendering on the
canvas underneath). The orange 'OpenTimestamps' filter chip in the
filter row above already conveys the same signal, so hide the entire
Digital Artifacts row for OTS-commit txs. The rare OTS + parser-
derived artifact combo loses the row in the tooltip, but the chip
row still carries every artifact type and the tx-detail page has the
full viewers.

ots page: drop the broken '(see the list below)' fragment link (same
issue as the earlier 'examples below' link -- the fragment doesn't
scroll to the section because the anchor is rendered later), and
merge the two intro paragraphs into one for tighter copy.

Author: hans-crypto

frontend/src/app/components/_ordpool/open-timestamps/open-timestamps.component.html

@@ -17,15 +17,10 @@ <h1>OpenTimestamps: Anchor any file to Bitcoin</h1>
     Ordpool tags every OTS transaction wherever it appears in the explorer, so
     you can see Bitcoin's notary at work in real time, and you can verify your
     own <code>.ots</code> receipt right here, against our independent open-source
-    implementation.
-  </p>
-
-  <p>
-    The whole process is <strong>free</strong>. Calendar operators sponsor the
-    Bitcoin transaction fees and Merkle-batch every submission they receive
-    into a single anchor. Huge thanks to the operators (see the
-    <a [routerLink]="[]" fragment="calendars">list below</a>) who keep this
-    open public good alive.
+    implementation. The whole process is <strong>free</strong>. Calendar
+    operators sponsor the Bitcoin transaction fees and Merkle-batch every
+    submission they receive into a single anchor. Huge thanks to the operators
+    who keep this open public good alive.
   </p>
 
   <p class="text-muted ots-sidenote">

frontend/src/app/components/block-overview-tooltip/block-overview-tooltip.component.html

@@ -104,51 +104,46 @@
         </td>
       </tr>
 
-      <!-- HACK -->
-      <tr >
-        <td class="td-width" colspan="2">Digital Artifacts</td>
-      </tr>
-      <tr>
-
-        <td class="text-center normal-white-space" *ngIf="{ digitalArtifacts: digitalArtifacts$ | async } as i"  colspan="2" style="height: 220px;">
-
-          <ng-container *ngIf="i.digitalArtifacts === undefined">
-            Loading...
-          </ng-container>
+      <!-- HACK -- Ordpool: suppress the entire Digital Artifacts row for
+           OTS-commit txs. The orange "OpenTimestamps" chip in the filter
+           row above already says it -- adding a 220 px content cell here
+           overflows the tooltip layout and reads as duplicate info.
+           Combined OTS + parser-derived artifact is rare; for those txs
+           the chip row carries every signal and the tx-detail page has
+           the full viewers. -->
+      <ng-container *ngIf="!isOtsCommit">
+        <tr>
+          <td class="td-width" colspan="2">Digital Artifacts</td>
+        </tr>
+        <tr>
+          <td class="text-center normal-white-space" *ngIf="{ digitalArtifacts: digitalArtifacts$ | async } as i"  colspan="2" style="height: 220px;">
 
-          <ng-container *ngIf="i.digitalArtifacts === null">
-            Error while loading. 😕<br>
-            Please try again!
-          </ng-container>
+            <ng-container *ngIf="i.digitalArtifacts === undefined">
+              Loading...
+            </ng-container>
 
-          <!-- HACK -- Ordpool: hide "None" when the tx is a known OTS
-               commit -- the OTS panel below already says what's in it. -->
-          <ng-container *ngIf="i.digitalArtifacts && !i.digitalArtifacts.length && !isOtsCommit">
-            None
-          </ng-container>
+            <ng-container *ngIf="i.digitalArtifacts === null">
+              Error while loading. 😕<br>
+              Please try again!
+            </ng-container>
 
-          <!-- HACK -- Ordpool: OTS commits aren't parser-derivable, so they
-               don't appear in `i.digitalArtifacts`. Render a small inline
-               summary directly from the tx.flags bit instead. -->
-          <div *ngIf="isOtsCommit" class="text-left" style="width: 300px;">
-            <strong>OpenTimestamps</strong>
-            <div class="smaller-text" style="opacity: 0.7;">
-              Calendar batch commit anchoring a Merkle root in OP_RETURN
-            </div>
-          </div>
+            <ng-container *ngIf="i.digitalArtifacts && !i.digitalArtifacts.length">
+              None
+            </ng-container>
 
-          <div class="text-left" style="width: 300px;" *ngIf="i.digitalArtifacts && i.digitalArtifacts.length">
-            <app-digital-artifact-viewer
-              [showDetails]="false"
-              [digitalArtifact]="i.digitalArtifacts[0]"
-            />
-            <div *ngIf="i.digitalArtifacts.length > 1">
-              + {{ i.digitalArtifacts.length - 1 }} more digital artifacts
+            <div class="text-left" style="width: 300px;" *ngIf="i.digitalArtifacts && i.digitalArtifacts.length">
+              <app-digital-artifact-viewer
+                [showDetails]="false"
+                [digitalArtifact]="i.digitalArtifacts[0]"
+              />
+              <div *ngIf="i.digitalArtifacts.length > 1">
+                + {{ i.digitalArtifacts.length - 1 }} more digital artifacts
+              </div>
             </div>
-          </div>
 
-        </td>
-      </tr>
+          </td>
+        </tr>
+      </ng-container>
 
     </tbody>
   </table>