Fix AI chat icon colors in dark theme Explicitly sets the color of `md-icon` elements within `md-icon-button` to `var(--primary-text-color)`. This ensures that icons such as the overflow menu and regenerate button are visible in dark mode, where they were previously appearing inactive (dark gray). Google-Bug-Id: b/477394737 Release-Notes: skip Change-Id: I7e93716d752f2ddf5d06fa2f3d3605d7d9e37c35

diff --git a/polygerrit-ui/app/elements/chat-panel/chat-header.ts b/polygerrit-ui/app/elements/chat-panel/chat-header.ts
index 6f071e8..812baa0 100644
--- a/polygerrit-ui/app/elements/chat-panel/chat-header.ts
+++ b/polygerrit-ui/app/elements/chat-panel/chat-header.ts

@@ -113,6 +113,9 @@
       --md-icon-button-icon-color: var(--primary-text-color);
       --md-icon-button-hover-icon-color: var(--primary-text-color);
     }
+    md-icon-button md-icon {
+      color: var(--primary-text-color);
+    }
   `;
 
   @state() availableModels: ModelInfo[] = [];

diff --git a/polygerrit-ui/app/elements/chat-panel/message-actions.ts b/polygerrit-ui/app/elements/chat-panel/message-actions.ts
index 6a6397d..495e8e1 100644
--- a/polygerrit-ui/app/elements/chat-panel/message-actions.ts
+++ b/polygerrit-ui/app/elements/chat-panel/message-actions.ts

@@ -41,6 +41,14 @@
     .feedback-button.thumbs-up-icon {
       margin-left: auto;
     }
+    md-icon-button {
+      color: var(--primary-text-color);
+      --md-icon-button-icon-color: var(--primary-text-color);
+      --md-icon-button-hover-icon-color: var(--primary-text-color);
+    }
+    md-icon-button md-icon {
+      color: var(--primary-text-color);
+    }
   `;
 
   @property({type: Object}) turnId!: UniqueTurnId;

diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-dark.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-dark.png
index 6988015..4b6e5e7 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-dark.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-dark.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations-dark.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations-dark.png
index db4f545..9494d6e 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations-dark.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations-dark.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations.png
index b2c76ef..277550e 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-citations.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment-dark.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment-dark.png
index 9ba83e3..1f1cd44 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment-dark.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment-dark.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment.png
index 0f38f7e..9d635d5 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-comment.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references-dark.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references-dark.png
index 47296ec..caa010a 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references-dark.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references-dark.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references.png
index 82cbef0..fd428cd 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode-with-references.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode.png
index 3c9b4db..9c55238 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-chat-mode.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-dark.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-dark.png
index 9420cf1..94e160f 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-dark.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-dark.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private-dark.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private-dark.png
index 2cffe34..204f938 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private-dark.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private-dark.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private.png
index 1c35b68..8ccf3b6 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page-private.png
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diff --git a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page.png b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page.png
index 4a4aaab..6344dc9 100644
--- a/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page.png
+++ b/polygerrit-ui/screenshots/Chromium/baseline/chat-panel-splash-page.png
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