feat: minimal Today.md UI polish - no emoji headings, better track chip (#528)

* feat: remove emoji headings and polish track block chip styling

- Strip emojis from Today.md section headings (new + existing files via migration)
- Track chip: full-width card style matching email blocks, colored icons per track type
- Larger, taller chip with muted gray background for light/dark mode

* feat: increase track chip icon and text size

* feat: make track block icons configurable via yaml

apps/x/packages/core/src/knowledge/ensure_daily_note.ts

@@ -15,9 +15,10 @@ interface Section {
 
 const SECTIONS: Section[] = [
     {
-        heading: '## ⏱ Up Next',
+        heading: '## Up Next',
         track: {
             trackId: 'up-next',
+            icon: 'clock',
             instruction:
 `Write 1-3 sentences of plain markdown giving the user a shoulder-tap about what's next on their calendar today.
 
@@ -41,9 +42,10 @@ Plain markdown prose only — no calendar block, no email block, no headings.`,
         },
     },
     {
-        heading: '## 📅 Calendar',
+        heading: '## Calendar',
         track: {
             trackId: 'calendar',
+            icon: 'calendar-days',
             instruction:
 `Emit today's meetings as a calendar block titled "Today's Meetings".
 
@@ -60,9 +62,10 @@ After the block, you MAY add one short markdown line per event giving useful pre
         },
     },
     {
-        heading: '## 📧 Emails',
+        heading: '## Emails',
         track: {
             trackId: 'emails',
+            icon: 'mail',
             instruction:
 `Maintain a digest of email threads worth the user's attention today, rendered as zero or more email blocks (one per thread).
 
@@ -81,9 +84,10 @@ Do NOT re-list threads the user has already seen unless their state changed (new
         },
     },
     {
-        heading: '## 📰 What You Missed',
+        heading: '## What You Missed',
         track: {
             trackId: 'what-you-missed',
+            icon: 'history',
             instruction:
 `Short markdown summary of what happened yesterday that matters this morning.
 
@@ -106,9 +110,10 @@ Do NOT manufacture content to fill the section.`,
         },
     },
     {
-        heading: '## ✅ Today\'s Priorities',
+        heading: '## Today\'s Priorities',
         track: {
             trackId: 'priorities',
+            icon: 'list-todo',
             instruction:
 `Ranked markdown list of the real, actionable items the user should focus on today.
 
@@ -154,7 +159,28 @@ function buildDailyNoteContent(): string {
     return parts.join('\n');
 }
 
+function migrateEmojiHeadings(): void {
+    if (!fs.existsSync(DAILY_NOTE_PATH)) return;
+    let content = fs.readFileSync(DAILY_NOTE_PATH, 'utf-8');
+    const original = content;
+    const replacements: [string, string][] = [
+        ['## ⏱ Up Next', '## Up Next'],
+        ['## 📅 Calendar', '## Calendar'],
+        ['## 📧 Emails', '## Emails'],
+        ['## 📰 What You Missed', '## What You Missed'],
+        ["## ✅ Today's Priorities", "## Today's Priorities"],
+    ];
+    for (const [from, to] of replacements) {
+        content = content.split(from).join(to);
+    }
+    if (content !== original) {
+        fs.writeFileSync(DAILY_NOTE_PATH, content, 'utf-8');
+        console.log('[DailyNote] Migrated emoji headings');
+    }
+}
+
 export function ensureDailyNote(): void {
+    migrateEmojiHeadings();
     if (fs.existsSync(DAILY_NOTE_PATH)) return;
     fs.writeFileSync(DAILY_NOTE_PATH, buildDailyNoteContent(), 'utf-8');
     console.log('[DailyNote] Created today.md');

apps/x/packages/shared/src/track-block.ts

@@ -27,6 +27,7 @@ export const TrackBlockSchema = z.object({
     schedule: TrackScheduleSchema.optional(),
     model: z.string().optional().describe('ADVANCED — leave unset. Per-track LLM model override (e.g. "anthropic/claude-sonnet-4.6"). Only set when the user explicitly asked for a specific model for THIS track. The global default already picks a tuned model for tracks; overriding usually makes things worse, not better.'),
     provider: z.string().optional().describe('ADVANCED — leave unset. Per-track provider name override (e.g. "openai", "anthropic"). Only set when the user explicitly asked for a specific provider for THIS track. Almost always omitted; the global default flows through correctly.'),
+    icon: z.string().optional().describe('Lucide icon name for the chip (e.g. "clock", "calendar-days", "mail", "history", "list-todo"). Omit to use the default icon for this track.'),
     lastRunAt: z.string().optional().describe('Runtime-managed — never write this yourself'),
     lastRunId: z.string().optional().describe('Runtime-managed — never write this yourself'),
     lastRunSummary: z.string().optional().describe('Runtime-managed — never write this yourself'),