feat: stats and achievements (#45)

### Explanation

_No response_

### Issue

Closes #39

### Attestations

- [ ] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [ ] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [ ] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [ ] I have pinned the dependencies to a specific patch version.

### Style

- [ ] I have run the linter and resolved any errors.
- [ ] My pull request uses an appropriate title, matching the conventional commit standards.
- [ ] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

_No response_

### Versioning

_No response_

Reviewed-on: #45
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/lib/components/Terminal.svelte

@@ -25,17 +25,17 @@
   function getLineClass(type: string): string {
     switch (type) {
       case "user":
-        return "text-cyan-400";
+        return "terminal-user";
       case "assistant":
-        return "text-gray-100";
+        return "terminal-assistant";
       case "system":
-        return "text-gray-500 italic";
+        return "terminal-system italic";
       case "tool":
-        return "text-purple-400";
+        return "terminal-tool";
       case "error":
-        return "text-red-400";
+        return "terminal-error";
       default:
-        return "text-gray-300";
+        return "terminal-default";
     }
   }
 
@@ -75,7 +75,7 @@
       <div class="w-3 h-3 rounded-full bg-yellow-500"></div>
       <div class="w-3 h-3 rounded-full bg-green-500"></div>
     </div>
-    <span class="text-sm text-gray-400 ml-2">Terminal</span>
+    <span class="text-sm terminal-header-text ml-2">Terminal</span>
   </div>
 
   <div
@@ -84,16 +84,18 @@
     class="terminal-content h-[calc(100%-40px)] overflow-y-auto p-4 font-mono text-sm"
   >
     {#if lines.length === 0}
-      <div class="text-gray-500 italic">Waiting for Claude... Type a message below to start!</div>
+      <div class="terminal-waiting italic">
+        Waiting for Claude... Type a message below to start!
+      </div>
     {:else}
       {#each lines as line (line.id)}
         <div class="terminal-line mb-2 {getLineClass(line.type)}">
-          <span class="text-gray-600 text-xs mr-2">{formatTime(line.timestamp)}</span>
+          <span class="terminal-timestamp text-xs mr-2">{formatTime(line.timestamp)}</span>
           {#if getLinePrefix(line.type)}
-            <span class="text-gray-500 mr-2">{getLinePrefix(line.type)}</span>
+            <span class="terminal-prefix mr-2">{getLinePrefix(line.type)}</span>
           {/if}
           {#if line.toolName}
-            <span class="text-purple-300 mr-2">[{line.toolName}]</span>
+            <span class="terminal-tool-name mr-2">[{line.toolName}]</span>
           {/if}
           <span class="whitespace-pre-wrap">{line.content}</span>
         </div>
@@ -107,4 +109,49 @@
     scrollbar-width: thin;
     scrollbar-color: var(--border-color) var(--bg-terminal);
   }
+
+  /* Terminal text colors that adapt to theme */
+  .terminal-user {
+    color: var(--terminal-user, #22d3ee);
+  }
+
+  .terminal-assistant {
+    color: var(--text-primary);
+  }
+
+  .terminal-system {
+    color: var(--text-secondary);
+  }
+
+  .terminal-tool {
+    color: var(--terminal-tool, #c084fc);
+  }
+
+  .terminal-error {
+    color: var(--terminal-error, #f87171);
+  }
+
+  .terminal-default {
+    color: var(--text-primary);
+  }
+
+  .terminal-timestamp {
+    color: var(--text-tertiary, #6b7280);
+  }
+
+  .terminal-prefix {
+    color: var(--text-secondary);
+  }
+
+  .terminal-tool-name {
+    color: var(--terminal-tool-name, #ddd6fe);
+  }
+
+  .terminal-waiting {
+    color: var(--text-secondary);
+  }
+
+  .terminal-header-text {
+    color: var(--text-secondary);
+  }
 </style>