feat(app): session timeline/turn rework (#13196)

Co-authored-by: David Hill <[email protected]>

1 files changed, 78 insertions, 513 deletions

diff --git a/packages/ui/src/components/session-turn.css b/packages/ui/src/components/session-turn.css
index 414e8a359..5d58f0f71 100644
--- a/packages/ui/src/components/session-turn.css
+++ b/packages/ui/src/components/session-turn.css
@@ -1,7 +1,5 @@
 [data-component="session-turn"] {
-  --session-turn-sticky-height: 0px;
-  --sticky-header-height: calc(var(--session-title-height, 0px) + var(--session-turn-sticky-height, 0px) + 24px);
-  /* flex: 1; */
+  --sticky-header-height: calc(var(--session-title-height, 0px) + 24px);
   height: 100%;
   min-height: 0;
   min-width: 0;
@@ -30,580 +28,147 @@
     min-width: 0;
     gap: 18px;
     overflow-anchor: none;
-
-    [data-slot="session-turn-badge"] {
-      display: inline-flex;
-      align-items: center;
-      padding: 2px 6px;
-      border-radius: 4px;
-      font-family: var(--font-family-mono);
-      font-size: var(--font-size-x-small);
-      font-weight: var(--font-weight-medium);
-      line-height: var(--line-height-normal);
-      white-space: nowrap;
-      color: var(--text-base);
-      background: var(--surface-raised-base);
-    }
-  }
-
-  [data-slot="session-turn-attachments"] {
-    width: 100%;
-    min-width: 0;
-    align-self: stretch;
-  }
-
-  [data-slot="session-turn-sticky"] {
-    width: calc(100% + 9px);
-    position: sticky;
-    top: var(--session-title-height, 0px);
-    z-index: 20;
-    background-color: var(--background-stronger);
-    margin-left: -9px;
-    padding-left: 9px;
-    /* padding-bottom: 12px; */
-    display: flex;
-    flex-direction: column;
-    gap: 12px;
-
-    &::before {
-      content: "";
-      position: absolute;
-      top: 0;
-      bottom: 0;
-      left: 0;
-      right: 0;
-      background-color: var(--background-stronger);
-      z-index: -1;
-    }
-
-    &::after {
-      content: "";
-      position: absolute;
-      top: 100%;
-      left: 0;
-      right: 0;
-      height: 32px;
-      background: linear-gradient(to bottom, var(--background-stronger), transparent);
-      pointer-events: none;
-    }
-  }
-
-  [data-slot="session-turn-message-header"] {
-    display: flex;
-    align-items: center;
-    align-self: stretch;
-    height: 32px;
   }
 
   [data-slot="session-turn-message-content"] {
     margin-top: 0;
+    width: 100%;
+    min-width: 0;
     max-width: 100%;
   }
 
-  [data-component="user-message"] [data-slot="user-message-text"] {
-    max-height: var(--user-message-collapsed-height, 64px);
-  }
-
-  [data-component="user-message"][data-expanded="true"] [data-slot="user-message-text"] {
-    max-height: none;
-  }
-
-  [data-component="user-message"][data-can-expand="true"] [data-slot="user-message-text"] {
-    padding-right: 36px;
-    padding-bottom: 28px;
-  }
-
-  [data-component="user-message"][data-can-expand="true"]:not([data-expanded="true"])
-    [data-slot="user-message-text"]::after {
-    content: "";
-    position: absolute;
-    left: 0;
-    right: 0;
-    height: 8px;
-    bottom: 0px;
-    background:
-      linear-gradient(to bottom, transparent, var(--surface-weak)),
-      linear-gradient(to bottom, transparent, var(--surface-weak));
-    pointer-events: none;
-  }
-
-  [data-component="user-message"] [data-slot="user-message-text"] [data-slot="user-message-expand"] {
-    display: none;
-    position: absolute;
-    bottom: 6px;
-    right: 6px;
-    padding: 0;
-  }
-
-  [data-component="user-message"][data-can-expand="true"]
-    [data-slot="user-message-text"]
-    [data-slot="user-message-expand"],
-  [data-component="user-message"][data-expanded="true"]
-    [data-slot="user-message-text"]
-    [data-slot="user-message-expand"] {
-    display: inline-flex;
+  [data-slot="session-turn-thinking"] {
+    display: flex;
     align-items: center;
-    justify-content: center;
-    height: 22px;
-    width: 22px;
-    border: none;
-    border-radius: 6px;
-    background: transparent;
-    cursor: pointer;
+    gap: 8px;
     color: var(--text-weak);
+    font-family: var(--font-family-sans);
+    font-size: var(--font-size-base);
+    font-weight: var(--font-weight-medium);
+    line-height: var(--line-height-large);
+    min-height: 20px;
 
-    [data-slot="icon-svg"] {
-      transition: transform 0.15s ease;
+    [data-component="spinner"] {
+      width: 16px;
+      height: 16px;
     }
   }
 
-  [data-component="user-message"][data-expanded="true"]
-    [data-slot="user-message-text"]
-    [data-slot="user-message-expand"]
-    [data-slot="icon-svg"] {
-    transform: rotate(180deg);
-  }
-
-  [data-component="user-message"] [data-slot="user-message-text"] [data-slot="user-message-expand"]:hover {
-    background: var(--surface-raised-base);
-    color: var(--text-base);
-  }
-
-  [data-slot="session-turn-user-badges"] {
-    display: flex;
-    align-items: center;
-    gap: 6px;
-    padding-left: 16px;
+  .error-card {
+    color: var(--text-on-critical-base);
+    max-height: 240px;
+    white-space: pre-wrap;
+    overflow-wrap: anywhere;
+    word-break: break-word;
+    overflow-y: auto;
   }
 
-  [data-slot="session-turn-message-title"] {
+  [data-slot="session-turn-assistant-content"] {
     width: 100%;
-    font-size: var(--font-size-large);
-    font-weight: 500;
-    color: var(--text-strong);
-    overflow: hidden;
-    text-overflow: ellipsis;
-    min-width: 0;
-    white-space: nowrap;
-  }
-
-  [data-slot="session-turn-message-title"] h1 {
-    overflow: hidden;
-    text-overflow: ellipsis;
-    min-width: 0;
-    white-space: nowrap;
-    font-size: inherit;
-    font-weight: inherit;
-  }
-
-  [data-slot="session-turn-typewriter"] {
-    overflow: hidden;
-    text-overflow: ellipsis;
     min-width: 0;
-    white-space: nowrap;
-  }
-
-  [data-slot="session-turn-summary-section"] {
-    width: 100%;
     display: flex;
     flex-direction: column;
-    gap: 24px;
-    align-items: flex-start;
     align-self: stretch;
-  }
-
-  [data-slot="session-turn-summary-header"] {
-    display: flex;
-    flex-direction: column;
-    align-items: flex-start;
-    gap: 4px;
-    align-self: stretch;
-
-    [data-slot="session-turn-summary-title-row"] {
-      width: 100%;
-      display: flex;
-      align-items: center;
-      justify-content: space-between;
-      gap: 12px;
-    }
-
-    [data-slot="session-turn-response"] {
-      width: 100%;
-    }
-
-    [data-slot="session-turn-response-copy-wrapper"] {
-      opacity: 0;
-      pointer-events: none;
-      transition: opacity 0.15s ease;
-    }
-
-    &:hover [data-slot="session-turn-response-copy-wrapper"],
-    &:focus-within [data-slot="session-turn-response-copy-wrapper"] {
-      opacity: 1;
-      pointer-events: auto;
-    }
-
-    p {
-      font-size: var(--font-size-base);
-      line-height: var(--line-height-x-large);
-    }
-  }
-
-  [data-slot="session-turn-summary-title"] {
-    font-size: 13px;
-    /* text-12-medium */
-    font-weight: 500;
-    color: var(--text-weak);
-  }
-
-  [data-slot="session-turn-markdown"],
-  [data-slot="session-turn-accordion"] [data-slot="accordion-content"] {
-    -webkit-user-select: text;
-    user-select: text;
-  }
-
-  [data-slot="session-turn-markdown"] {
-    &[data-diffs="true"] {
-      font-size: 15px;
-    }
-
-    &[data-fade="true"] > * {
-      animation: fadeUp 0.4s ease-out forwards;
-      opacity: 0;
-
-      &:nth-child(1) {
-        animation-delay: 0.1s;
-      }
-
-      &:nth-child(2) {
-        animation-delay: 0.2s;
-      }
-
-      &:nth-child(3) {
-        animation-delay: 0.3s;
-      }
-
-      &:nth-child(4) {
-        animation-delay: 0.4s;
-      }
-
-      &:nth-child(5) {
-        animation-delay: 0.5s;
-      }
-
-      &:nth-child(6) {
-        animation-delay: 0.6s;
-      }
-
-      &:nth-child(7) {
-        animation-delay: 0.7s;
-      }
-
-      &:nth-child(8) {
-        animation-delay: 0.8s;
-      }
-
-      &:nth-child(9) {
-        animation-delay: 0.9s;
-      }
-
-      &:nth-child(10) {
-        animation-delay: 1s;
-      }
-
-      &:nth-child(11) {
-        animation-delay: 1.1s;
-      }
-
-      &:nth-child(12) {
-        animation-delay: 1.2s;
-      }
-
-      &:nth-child(13) {
-        animation-delay: 1.3s;
-      }
-
-      &:nth-child(14) {
-        animation-delay: 1.4s;
-      }
-
-      &:nth-child(15) {
-        animation-delay: 1.5s;
-      }
-
-      &:nth-child(16) {
-        animation-delay: 1.6s;
-      }
-
-      &:nth-child(17) {
-        animation-delay: 1.7s;
-      }
-
-      &:nth-child(18) {
-        animation-delay: 1.8s;
-      }
-
-      &:nth-child(19) {
-        animation-delay: 1.9s;
-      }
-
-      &:nth-child(20) {
-        animation-delay: 2s;
-      }
-
-      &:nth-child(21) {
-        animation-delay: 2.1s;
-      }
-
-      &:nth-child(22) {
-        animation-delay: 2.2s;
-      }
-
-      &:nth-child(23) {
-        animation-delay: 2.3s;
-      }
-
-      &:nth-child(24) {
-        animation-delay: 2.4s;
-      }
-
-      &:nth-child(25) {
-        animation-delay: 2.5s;
-      }
-
-      &:nth-child(26) {
-        animation-delay: 2.6s;
-      }
-
-      &:nth-child(27) {
-        animation-delay: 2.7s;
-      }
-
-      &:nth-child(28) {
-        animation-delay: 2.8s;
-      }
-
-      &:nth-child(29) {
-        animation-delay: 2.9s;
-      }
-
-      &:nth-child(30) {
-        animation-delay: 3s;
-      }
-    }
-  }
-
-  [data-slot="session-turn-summary-section"] {
-    position: relative;
-
-    [data-slot="session-turn-summary-copy"] {
-      position: absolute;
-      top: 0;
-      right: 0;
-      opacity: 0;
-      transition: opacity 0.15s ease;
-    }
+    gap: 12px;
 
-    &:hover [data-slot="session-turn-summary-copy"] {
-      opacity: 1;
+    > :first-child > [data-component="markdown"]:first-child {
+      margin-top: 0;
     }
   }
 
-  [data-slot="session-turn-accordion"] {
+  [data-slot="session-turn-diffs"] {
     width: 100%;
+    min-width: 0;
   }
 
-  [data-component="sticky-accordion-header"] {
-    top: var(--sticky-header-height, 0px);
-  }
-
-  [data-component="sticky-accordion-header"][data-expanded]::before,
-  [data-slot="accordion-item"][data-expanded] [data-component="sticky-accordion-header"]::before {
-    top: calc(-1 * var(--sticky-header-height, 0px));
-  }
-
-  [data-slot="session-turn-accordion-trigger-content"] {
-    display: flex;
-    align-items: center;
-    justify-content: space-between;
+  [data-component="session-turn-diffs-trigger"] {
     width: 100%;
-    gap: 20px;
-
-    [data-expandable="false"] {
-      pointer-events: none;
-    }
-  }
-
-  [data-slot="session-turn-file-info"] {
-    flex-grow: 1;
     display: flex;
     align-items: center;
-    gap: 20px;
-    min-width: 0;
+    justify-content: flex-start;
+    gap: 8px;
+    padding: 0;
   }
 
-  [data-slot="session-turn-file-icon"] {
-    flex-shrink: 0;
-    width: 16px;
-    height: 16px;
+  [data-slot="session-turn-diffs-title"] {
+    display: inline-flex;
+    align-items: baseline;
+    gap: 8px;
   }
 
-  [data-slot="session-turn-file-path"] {
-    display: flex;
-    flex-grow: 1;
-    min-width: 0;
+  [data-slot="session-turn-diffs-label"] {
+    color: var(--text-strong);
+    font-family: var(--font-family-sans);
+    font-size: var(--font-size-base);
+    font-weight: var(--font-weight-medium);
+    line-height: var(--line-height-large);
   }
 
-  [data-slot="session-turn-directory"] {
+  [data-slot="session-turn-diffs-count"] {
     color: var(--text-base);
-    text-overflow: ellipsis;
-    overflow: hidden;
-    white-space: nowrap;
-    direction: rtl;
-    text-align: left;
+    font-family: var(--font-family-sans);
+    font-size: var(--font-size-base);
+    font-weight: var(--font-weight-regular);
+    line-height: var(--line-height-x-large);
   }
 
-  [data-slot="session-turn-filename"] {
-    color: var(--text-strong);
-    flex-shrink: 0;
-  }
-
-  [data-slot="session-turn-accordion-actions"] {
-    flex-shrink: 0;
-    display: flex;
-    gap: 16px;
+  [data-slot="session-turn-diffs-meta"] {
+    display: inline-flex;
     align-items: center;
-    justify-content: flex-end;
-  }
-
-  [data-slot="session-turn-accordion-content"] {
-    max-height: 240px;
-    /* max-h-60 */
-    overflow-y: auto;
-    scrollbar-width: none;
-  }
+    gap: 8px;
+    flex-shrink: 0;
 
-  [data-slot="session-turn-accordion-content"]::-webkit-scrollbar {
-    display: none;
+    [data-component="diff-changes"][data-variant="bars"] {
+      transform: translateY(1px);
+    }
   }
 
-  [data-slot="session-turn-response-section"] {
-    width: calc(100% + 9px);
-    min-width: 0;
-    margin-left: -9px;
-    padding-left: 9px;
+  [data-component="session-turn-diffs-content"] {
+    padding-top: 8px;
+    display: flex;
+    flex-direction: column;
+    gap: 12px;
   }
 
-  [data-slot="session-turn-collapsible"] {
-    gap: 32px;
-    overflow: visible;
+  [data-component="session-turn-diff"] {
+    border: 1px solid var(--border-weaker-base);
+    border-radius: var(--radius-md);
+    overflow: clip;
   }
 
-  [data-slot="session-turn-collapsible-trigger-content"] {
-    max-width: 100%;
-    min-width: 0;
+  [data-slot="session-turn-diff-header"] {
     display: flex;
     align-items: center;
-    gap: 8px;
-    color: var(--text-weak);
-
-    [data-slot="session-turn-trigger-icon"] {
-      color: var(--icon-base);
-    }
-
-    [data-component="spinner"] {
-      width: 12px;
-      height: 12px;
-      margin-right: 4px;
-    }
-
-    [data-component="icon"] {
-      width: 14px;
-      height: 14px;
-    }
+    justify-content: space-between;
+    gap: 12px;
+    padding: 6px 10px;
+    border-bottom: 1px solid var(--border-weaker-base);
   }
 
-  [data-slot="session-turn-retry-message"] {
-    font-weight: 500;
-    color: var(--syntax-critical);
+  [data-slot="session-turn-diff-path"] {
+    display: inline-flex;
     min-width: 0;
+    align-items: baseline;
     overflow: hidden;
     text-overflow: ellipsis;
     white-space: nowrap;
+    font-family: var(--font-family-sans);
+    font-size: var(--font-size-small);
+    line-height: var(--line-height-large);
   }
 
-  [data-slot="session-turn-retry-seconds"] {
+  [data-slot="session-turn-diff-directory"] {
     color: var(--text-weak);
   }
 
-  [data-slot="session-turn-retry-attempt"] {
-    color: var(--text-weak);
-  }
-
-  [data-slot="session-turn-status-text"] {
-    overflow: hidden;
-    text-overflow: ellipsis;
-  }
-
-  [data-slot="session-turn-details-text"] {
-    font-size: 13px;
-    /* text-12-medium */
-    font-weight: 500;
-  }
-
-  .error-card {
-    color: var(--text-on-critical-base);
-    max-height: 240px;
-    white-space: pre-wrap;
-    overflow-wrap: anywhere;
-    word-break: break-word;
-    overflow-y: auto;
-  }
-
-  .retry-error-link,
-  .error-card-link {
+  [data-slot="session-turn-diff-filename"] {
     color: var(--text-strong);
-    text-decoration: underline;
-  }
-
-  [data-slot="session-turn-collapsible-content-inner"] {
-    width: 100%;
-    min-width: 0;
-    display: flex;
-    flex-direction: column;
-    align-self: stretch;
-    gap: 12px;
-    margin-left: 12px;
-    padding-left: 12px;
-    padding-right: 12px;
-    border-left: 1px solid var(--border-base);
-
-    > :first-child > [data-component="markdown"]:first-child {
-      margin-top: 0;
-    }
-  }
-
-  [data-slot="session-turn-permission-parts"] {
-    width: 100%;
-    min-width: 0;
-    display: flex;
-    flex-direction: column;
-    gap: 12px;
+    font-weight: var(--font-weight-medium);
   }
 
-  [data-slot="session-turn-question-parts"] {
+  [data-slot="session-turn-diff-view"] {
+    background-color: var(--surface-inset-base);
     width: 100%;
     min-width: 0;
-    display: flex;
-    flex-direction: column;
-    gap: 12px;
-  }
-
-  [data-slot="session-turn-answered-question-parts"] {
-    width: 100%;
-    min-width: 0;
-    display: flex;
-    flex-direction: column;
-    gap: 12px;
   }
 }