feat: ship v1.0.0 with character graph and writing analytics

Add P7 Cytoscape relationship graph with setting CRUD, P9 cockpit analytics driven by writing_sessions, chapter POV selection, and full test coverage.

Co-authored-by: Cursor <cursoragent@cursor.com>

public/locales/en/translation.json

@@ -226,6 +226,32 @@
   "cockpit.heatmap": "Writing heatmap",
   "cockpit.achievements": "Writing achievements",
   "cockpit.pomodoroToday": "{{count}} pomodoros today",
+  "cockpit.openGraph": "Character relationship graph",
+  "graph.title": "Character relationship graph",
+  "graph.layout.cose": "Force-directed",
+  "graph.layout.grid": "Grid",
+  "graph.layout.circle": "Circle",
+  "graph.truncated": "Too many characters; showing first {{count}} only",
+  "graph.sidebar.node": "Character: {{name}}",
+  "graph.sidebar.edge": "Relationship: {{label}}",
+  "graph.sidebar.hint": "Tap a node or edge for details",
+  "graph.editSetting": "Edit setting",
+  "graph.filter.all": "All characters",
+  "graph.filter.connected": "Connected only",
+  "relationship.title": "Character relationships",
+  "relationship.add": "Add relationship",
+  "relationship.target": "Target character",
+  "relationship.label": "Relationship label",
+  "relationship.intimacy": "Intimacy",
+  "analytics.title": "Writing analytics",
+  "analytics.speedToday": "Today {{wpm}} words/min",
+  "analytics.speedUnknown": "No speed data yet",
+  "analytics.hourlyHeatmap": "Writing hours (last 30 days)",
+  "analytics.povDistribution": "POV word distribution",
+  "analytics.volumeDistribution": "Words by volume",
+  "analytics.weekTrend": "Last 7 days",
+  "analytics.povUnassigned": "Unassigned POV",
+  "chapter.pov": "POV character",
   "pomodoro.start": "Start pomodoro",
   "pomodoro.pause": "Pause",
   "pomodoro.resume": "Resume",