power: in-app 'Keep Power' upgrade (monthly/annual → Stripe)

Wispr model: pay inside the app, not on a marketing page. A Power-trial user
now sees a 'Keep Power' block in Settings → Account (X days left) with $30/mo
and $24/mo-annual buttons. _act_upgrade_power opens the Stripe checkout for the
chosen interval, prefilled + client_reference_id'd with the account email so the
webhook binds the payment. Shown only during a trial (plan=power + trialDaysLeft
set); a paying Power user doesn't see it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019GTBZjBGurqsHUHsjaU1gA

Author: sodiumsun

heard/home_window.py

@@ -25,6 +25,12 @@
 
 _HTML = Path(__file__).with_name("onboarding.html")
 
+# Power subscription checkout (public Stripe payment links). Opened from the
+# in-app "Keep Power" upgrade; the account is bound via prefilled email +
+# client_reference_id. Paying flips the plan to 'power' through the webhook.
+_POWER_MONTHLY_BUY_URL = "https://buy.stripe.com/3cIfZa2X13We0g6eac77O03"  # $30/mo
+_POWER_ANNUAL_BUY_URL = "https://buy.stripe.com/00w6oAeFJ2Sad2S8PS77O08"  # $288/yr
+
 _controller = None       # window-controller singleton (reused on re-open)
 _HeardHomeClass = None    # ObjC class, built lazily on first use
 
@@ -631,6 +637,25 @@ def _act_open_power_page(self, body):
             except Exception as e:
                 _log_bridge_error("open_power_page", e)
 
+        def _act_upgrade_power(self, body):
+            # Convert a Power TRIAL to a paid subscription (Wispr model: pay in
+            # the app, not on a marketing page). Opens the Stripe checkout for the
+            # chosen interval, prefilled + client_reference_id'd with the user's
+            # email so the webhook binds the payment to this account.
+            try:
+                import urllib.parse
+                import webbrowser
+
+                interval = (body.get("interval") or "monthly").strip().lower()
+                url = _POWER_ANNUAL_BUY_URL if interval == "annual" else _POWER_MONTHLY_BUY_URL
+                email = (config.load().get("heard_email") or "").strip()
+                if email:
+                    q = urllib.parse.quote(email, safe="")
+                    url = f"{url}?prefilled_email={q}&client_reference_id={q}"
+                webbrowser.open(url)
+            except Exception as e:
+                _log_bridge_error("upgrade_power", e)
+
         def _act_manage_account(self, body):
             # Open the browser to manage plan / payment / email on heard.dev.
             try:

heard/onboarding.html

@@ -483,6 +483,7 @@
       </div>
       ${S.signedIn && S.plan!=='power' ? `<div style="border-top:1px solid var(--line);margin:14px -18px 0;padding:14px 18px 0;display:flex;align-items:center;justify-content:space-between;gap:12px"><div><div style="font-weight:600">Try Power free</div><div style="font:400 13px var(--sans);color:var(--ink-2);margin-top:2px">14 days of hands-free voice control. No card.</div></div><button class="btn btn-primary" style="padding:9px 16px" onclick="bridge('start_power_trial')">Start trial</button></div>` : ''}
       ${S.plan==='power' && !S.powerBuild ? `<div style="border-top:1px solid var(--line);margin:14px -18px 0;padding:14px 18px 0;display:flex;align-items:center;justify-content:space-between;gap:12px"><div><div style="font-weight:600">Get the Power app</div><div style="font:400 13px var(--sans);color:var(--ink-2);margin-top:2px">You're on Power - install the Power app to unlock voice input.</div></div><button class="btn btn-primary" style="padding:9px 16px" onclick="bridge('open_power_page')">Download</button></div>` : ''}
+      ${S.plan==='power' && S.trialDaysLeft!=null ? `<div style="border-top:1px solid var(--line);margin:14px -18px 0;padding:14px 18px 0"><div style="display:flex;align-items:center;justify-content:space-between;gap:12px"><div><div style="font-weight:600">Keep Power</div><div style="font:400 13px var(--sans);color:var(--ink-2);margin-top:2px">${S.trialDaysLeft===0?'Your trial ends today':S.trialDaysLeft+' day'+(S.trialDaysLeft===1?'':'s')+' left in your trial'} - upgrade to keep hands-free voice.</div></div></div><div style="display:flex;gap:8px;margin-top:12px"><button class="btn btn-primary" style="padding:9px 16px;flex:1" onclick="bridge('upgrade_power',{interval:'monthly'})">$30 / month</button><button class="btn btn-primary" style="padding:9px 16px;flex:1" onclick="bridge('upgrade_power',{interval:'annual'})">$24 / mo · annual</button></div></div>` : ''}
     </div>
     ${S.byokEnabled ? `${_HD('API keys')}
     <div style="font:400 12.5px/1.5 var(--sans);color:var(--ink-2);margin:-6px 0 10px">Bring your own keys. Heard sends narration <b>straight to these providers</b> using your key - never through our servers. Leave blank to use your plan’s cloud voices, or the local Kokoro voice for zero cloud.</div>