feat: import private calendar capacity for Week Ahead (Closes #1206)

frontend/index.html

@@ -509,11 +509,30 @@
       <div class="small">Final planning step</div>
       <h2 id="week-review-title">Review &amp; rebalance Week Ahead</h2>
       <p class="small muted">Check each day’s load. Move work instead of copying it, then confirm one executable week.</p>
+      <button id="open-week-capacity-import" type="button">Set capacity from calendar</button>
       <div class="week-review-duplicates" id="week-review-duplicates" role="alert" hidden></div>
       <div class="week-review-days" id="week-review-days"></div>
       <div class="small week-review-status" id="week-review-status" role="status" aria-live="polite"></div>
       <button id="confirm-week-plan" type="button">Confirm Week Ahead</button>
     </section>
+    <section class="week-capacity-import" id="week-capacity-import" aria-labelledby="week-capacity-title" hidden>
+      <header><div><div class="small">Private calendar import</div><h2 id="week-capacity-title">Set Week Ahead capacity</h2></div>
+        <button id="cancel-week-capacity-import" type="button">Cancel</button></header>
+      <p class="small muted">Your calendar is read only on this device. Event titles, people, locations, and the file are never saved or uploaded.</p>
+      <label>Calendar file
+        <input id="week-capacity-file" type="file" accept=".ics,text/calendar" />
+      </label>
+      <div class="week-capacity-hours">
+        <label>Workday starts <input id="week-capacity-start" type="time" value="09:00" required /></label>
+        <label>Workday ends <input id="week-capacity-end" type="time" value="17:00" required /></label>
+      </div>
+      <div id="week-capacity-status" class="small" role="status" aria-live="assertive"></div>
+      <section id="week-capacity-review" aria-labelledby="week-capacity-review-title" hidden>
+        <h3 id="week-capacity-review-title">Review available time</h3>
+        <div id="week-capacity-days" class="week-capacity-days"></div>
+        <button id="apply-week-capacities" type="button">Apply seven capacities</button>
+      </section>
+    </section>
     <section class="week-calendar-handoff" id="week-calendar-handoff" aria-labelledby="week-calendar-title" hidden>
       <div class="small">Calendar handoff</div>
       <h2 id="week-calendar-title">Add Week Ahead to calendar</h2>
@@ -2028,6 +2047,7 @@
 <script src="static/plan-today-preview.js"></script>
 <script src="static/tomorrow-plan.js"></script>
 <script src="static/week-calendar.js"></script>
+<script src="static/week-calendar-import.js"></script>
 <script src="static/week-plan.js"></script>
 <script src="static/search-week-plan.js"></script>
 <script src="static/today-sync.js"></script>