feat: add App Config detail page with view/edit mode

Click a row in the admin App Config table to navigate to a dedicated
detail page at /admin/appconfig/:appId. Shows all config fields as
badges in view mode; pencil toggles to edit mode with dropdowns.

Traced processors are now editable (capture mode dropdown + remove
button per processor). Sections and header use card styling for
visual contrast. OidcConfigPage gets the same card treatment.

List page simplified to read-only badge overview with row click
navigation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/Admin/AppConfigPage.module.css

@@ -1,81 +1 @@
-.inspectLink {
-  background: transparent;
-  border: none;
-  color: var(--text-faint);
-  opacity: 0.75;
-  cursor: pointer;
-  font-size: 13px;
-  padding: 2px 4px;
-  border-radius: var(--radius-sm);
-  line-height: 1;
-  display: inline-flex;
-}
-
-.inspectLink:hover {
-  color: var(--text-primary);
-  opacity: 1;
-}
-
-.editBtn {
-  background: transparent;
-  border: none;
-  color: var(--text-faint);
-  opacity: 0.75;
-  cursor: pointer;
-  font-size: 13px;
-  padding: 2px 4px;
-  border-radius: var(--radius-sm);
-  line-height: 1;
-  display: inline-flex;
-}
-
-.editBtn:hover {
-  color: var(--text-primary);
-  opacity: 1;
-}
-
-.editBtn:disabled {
-  opacity: 0.3;
-  cursor: not-allowed;
-}
-
-.editActions {
-  display: inline-flex;
-  gap: 2px;
-}
-
-.inlineSelect {
-  padding: 3px 8px;
-  border: 1px solid var(--border-subtle);
-  border-radius: var(--radius-sm);
-  background: var(--bg-body);
-  color: var(--text-primary);
-  font-size: 11px;
-  font-family: var(--font-mono);
-  outline: none;
-  cursor: pointer;
-}
-
-.inlineSelect:focus {
-  border-color: var(--amber);
-}
-
-.inlineSelect:disabled {
-  opacity: 0.5;
-  cursor: not-allowed;
-}
-
-.inlineToggle {
-  display: flex;
-  align-items: center;
-  gap: 5px;
-  font-size: 11px;
-  font-family: var(--font-mono);
-  color: var(--text-secondary);
-  cursor: pointer;
-}
-
-.inlineToggle input {
-  accent-color: var(--amber);
-  cursor: pointer;
-}
+/* No custom styles needed — DataTable with badges handles everything */