Doctor summary: one-page PDF via PdfDocument + FileProvider share

Milestone 7. Human-readable A4 summary (meds, schedule, supply days,
rx expiry/reit, 30-day adherence, notes) — deliberately distinct from
the machine-readable JSON backup, zero PDF dependencies. The Norwegian
schedule phrasing (ScheduleText) and adherence math are pure and
unit-tested; a wrong schedule line on a doctor's desk is a clinical
communication error, so it gets engine-grade testing. FileProvider
exposes only cacheDir/summaries.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/src/main/java/no/naiv/meddetsamme/domain/ScheduleText.kt

@@ -0,0 +1,48 @@
+package no.naiv.meddetsamme.domain
+
+import no.naiv.meddetsamme.data.DoseTime
+
+/**
+ * Human-readable schedule descriptions (Norwegian, 24h) for the doctor
+ * summary and the UI. Pure — unit-tested like the engine, since a wrong
+ * description on a doctor's desk is a clinical communication error.
+ */
+object ScheduleText {
+
+    /** Mask bit order matches ScheduleEngine: bit 0 = Sunday. */
+    private val DAY_ABBREV = listOf("søn", "man", "tir", "ons", "tor", "fre", "lør")
+
+    fun describe(doseTime: DoseTime): String {
+        val time = "%02d:%02d".format(doseTime.minuteOfDay / 60, doseTime.minuteOfDay % 60)
+        return "$time ${daysText(doseTime)}"
+    }
+
+    fun daysText(doseTime: DoseTime): String {
+        if (doseTime.intervalDays > 1) {
+            return "(hver ${doseTime.intervalDays}. dag)"
+        }
+        return when (val mask = doseTime.daysOfWeekMask and 0x7F) {
+            0x7F -> "(daglig)"
+            0x3E -> "(man–fre)"
+            0x41 -> "(lør–søn)"
+            0 -> "(aldri)"
+            else -> {
+                // Week listed Monday-first for humans, despite bit 0 = Sunday.
+                val days = (1..7).map { it % 7 }
+                    .filter { mask and (1 shl it) != 0 }
+                    .map { DAY_ABBREV[it] }
+                "(${days.joinToString(", ")})"
+            }
+        }
+    }
+
+    /** "1 tablett", "2,5 ml" — norsk desimalkomma. */
+    fun amountText(amount: Double, unit: String): String {
+        val number = if (amount == amount.toLong().toDouble()) {
+            amount.toLong().toString()
+        } else {
+            amount.toString().replace('.', ',')
+        }
+        return "$number $unit"
+    }
+}