feat: Add tag support to file history display

- Modified cvs_client.py get_file_history() to parse and extract tags from CVS log
- Updated ui.js displayHistory() to render tags for each revision
- Added CSS styling for history tags with proper theming support
- Tags are displayed inline with revision information in history view

cvs_proxy/cvs_client.py

@@ -232,6 +232,7 @@ class CVSClient:
             revisions = []
             current_revision = {}
             in_log = False
+            in_tags = False
             
             for line in output.split('\n'):
                 # Look for revision lines (format: "revision X.X")
@@ -240,12 +241,19 @@ class CVSClient:
                 # Look for date/author/state line (format: "date: YYYY/MM/DD HH:MM:SS;  author: NAME;  state: STATE;")
                 date_match = re.match(r'^date:\s+(\d{4}/\d{2}/\d{2}\s+\d{2}:\d{2}:\d{2});\s+author:\s+(\S+);\s+state:\s+(\S+);', line)
                 
+                # Look for branches line (format: "branches: ...")
+                branches_match = re.match(r'^branches:', line)
+                
+                # Look for tag lines (format: "\tTAG_NAME: X.X")
+                tag_match = re.match(r'^\s+(\S+):\s+(\S+)', line)
+                
                 if rev_match:
                     # Start of a new revision
                     if current_revision and 'revision' in current_revision:
                         revisions.append(current_revision)
                     current_revision = {'revision': rev_match.group(1)}
                     in_log = False
+                    in_tags = False
                 
                 if date_match:
                     current_revision.update({
@@ -255,11 +263,29 @@ class CVSClient:
                         'lines_changed': 'N/A'  # cvs log doesn't provide line counts
                     })
                     in_log = False
+                    in_tags = False
+                
+                if branches_match:
+                    # Branches section starts, tags follow
+                    in_tags = True
+                    in_log = False
+                    continue
+                
+                # Capture tags (lines with indentation after branches line)
+                if in_tags and tag_match and not re.match(r'^---', line):
+                    tag_name = tag_match.group(1)
+                    tag_revision = tag_match.group(2)
+                    # Only add tags that match the current revision
+                    if tag_revision == current_revision.get('revision'):
+                        if 'tags' not in current_revision:
+                            current_revision['tags'] = []
+                        current_revision['tags'].append(tag_name)
                 
                 # Capture log message (lines after date/author/state until next revision or separator)
                 if in_log:
                     if line.strip() == '' or re.match(r'^---', line):
                         in_log = False
+                        in_tags = False
                     elif not re.match(r'^(revision|date|branches):', line):
                         if 'log' not in current_revision:
                             current_revision['log'] = ''
@@ -282,6 +308,9 @@ class CVSClient:
                     rev['log'] = rev['log'].strip().split('\n')[0]
                 else:
                     rev['log'] = ''
+                # Ensure tags field exists
+                if 'tags' not in rev:
+                    rev['tags'] = []
             
             return revisions
         except subprocess.CalledProcessError as e:

ui/styles.css

@@ -407,6 +407,31 @@ main {
     color: rgba(255, 255, 255, 0.9);
 }
 
+.history-tags {
+    display: flex;
+    gap: 0.25rem;
+    flex-wrap: wrap;
+}
+
+.history-tag {
+    display: inline-block;
+    padding: 0.125rem 0.5rem;
+    border-radius: 0.25rem;
+    font-size: 0.65rem;
+    font-weight: 600;
+    background-color: var(--primary-color);
+    color: white;
+    text-align: center;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.history-item.active .history-tag {
+    background-color: rgba(255, 255, 255, 0.2);
+    color: white;
+}
+
 /* Patchset View */
 .patchset-content {
     flex: 1;

ui/ui.js

@@ -244,6 +244,7 @@ class UIManager {
                 <div class="history-log-section">
                     <div class="history-log">${revision.log ? this.escapeHtml(revision.log) : ''}</div>
                     ${revision.state && revision.state !== 'Exp' ? `<span class="history-state">${revision.state}</span>` : ''}
+                    ${revision.tags && revision.tags.length > 0 ? `<span class="history-tags">${revision.tags.map(tag => `<span class="history-tag">${this.escapeHtml(tag)}</span>`).join('')}</span>` : ''}
                 </div>
                 <div class="history-author">${revision.author || 'Unknown'}</div>
                 <div class="history-date" title="${revision.date || 'N/A'}">${this.getRelativeDate(revision.date) || 'N/A'}</div>