style(web): fix prettier config, format entire web/ tree

.prettierrc.json was missing "semi": false, so prettier wanted to add
semicolons to a codebase written without them (763 semicolon-free
statements vs. 150 with, in hand-written .ts; zero hand-written .svelte
files use them at all). That's why prettier --check failed on 249 files
— not because the code was unformatted, but because the config didn't
match the actual house style. Added "semi": false; left printWidth/etc
as configured (printWidth barely moves the failure count: 218/213/212
files at 100/120/140).

Ran `prettier --write .` with the corrected config. Verified
semantics-preserving before and after:
- eslint: 142 problems both before and after, byte-identical
- build passes, 38/38 tests pass
- token-stream diff (whitespace/semicolons/quotes normalized) on all
  218 changed files: only 52 had any remaining token change, all either
  trailing-comma removal (matching trailingComma: "none") or import/
  ternary reflow — no semantic changes
- live smoke test: Knowledge, Tasks, Fleet map, and a chat window
  (AgentTrace, markdown, Scope graph, activity rail) all render
  correctly, no console errors

Most of the diff is shadcn/ui vendor files (lib/components/ui/) moving
from the CLI's own style (double quotes, tabs, semicolons) to house
style; re-running `shadcn-svelte add` on a component will need a
follow-up format pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/pages/Learning.svelte

@@ -85,11 +85,15 @@
   <Card.Root>
     <Card.Header>
       <Card.Title class="text-sm">Execution outcomes — last 30 days</Card.Title>
-      <Card.Description class="text-xs">Every gated action, by day it ran, succeeded vs failed.</Card.Description>
+      <Card.Description class="text-xs"
+        >Every gated action, by day it ran, succeeded vs failed.</Card.Description
+      >
     </Card.Header>
     <Card.Content>
       {#if trend.length === 0}
-        {#if !loading}<p class="py-8 text-center text-sm text-muted-foreground">No executions in the last 30 days yet.</p>{/if}
+        {#if !loading}<p class="py-8 text-center text-sm text-muted-foreground">
+            No executions in the last 30 days yet.
+          </p>{/if}
       {:else}
         <div bind:this={chartEl} class="w-full"></div>
       {/if}
@@ -98,8 +102,12 @@
 
   <Card.Root>
     <Card.Header>
-      <Card.Title class="flex items-center gap-1.5 text-sm"><TrendingUpIcon class="size-4" /> Capability timeline</Card.Title>
-      <Card.Description class="text-xs">What Nomos has learned to do, ordered by when it first succeeded.</Card.Description>
+      <Card.Title class="flex items-center gap-1.5 text-sm"
+        ><TrendingUpIcon class="size-4" /> Capability timeline</Card.Title
+      >
+      <Card.Description class="text-xs"
+        >What Nomos has learned to do, ordered by when it first succeeded.</Card.Description
+      >
     </Card.Header>
     <Card.Content>
       <div class="flex flex-col gap-2">
@@ -108,13 +116,17 @@
             <div>
               <span class="font-mono text-sm">{item.verb}</span>
               <span class="ml-2 text-xs text-muted-foreground">
-                {item.first_success ? `first succeeded ${fmtDate(item.first_success)}` : 'no successes yet'}
+                {item.first_success
+                  ? `first succeeded ${fmtDate(item.first_success)}`
+                  : 'no successes yet'}
               </span>
             </div>
             <Badge variant={timelineVariant(item)}>{item.successes}/{item.total}</Badge>
           </div>
         {:else}
-          {#if !loading}<p class="py-8 text-center text-sm text-muted-foreground">No executions yet.</p>{/if}
+          {#if !loading}<p class="py-8 text-center text-sm text-muted-foreground">
+              No executions yet.
+            </p>{/if}
         {/each}
       </div>
     </Card.Content>
@@ -123,12 +135,15 @@
   <Card.Root>
     <Card.Header>
       <Card.Title class="text-sm">Patterns</Card.Title>
-      <Card.Description class="text-xs">Statistically validated behaviors, extracted from outcome feedback.</Card.Description>
+      <Card.Description class="text-xs"
+        >Statistically validated behaviors, extracted from outcome feedback.</Card.Description
+      >
     </Card.Header>
     <Card.Content>
       {#if patterns.length === 0}
         <p class="py-6 text-center text-sm text-muted-foreground">
-          No patterns learned yet — patterns emerge once outcome feedback is recorded for repeated actions.
+          No patterns learned yet — patterns emerge once outcome feedback is recorded for repeated
+          actions.
         </p>
       {:else}
         <div class="flex flex-col gap-2">
@@ -136,7 +151,8 @@
             <div class="flex items-center justify-between gap-3 rounded-lg border px-3 py-2">
               <div>
                 <span class="text-sm">{p.pattern}</span>
-                <span class="ml-2 text-xs text-muted-foreground">{p.applies_type} · {p.action}</span>
+                <span class="ml-2 text-xs text-muted-foreground">{p.applies_type} · {p.action}</span
+                >
               </div>
               <Badge variant="outline">{(p.confidence * 100).toFixed(0)}% conf.</Badge>
             </div>
@@ -148,8 +164,12 @@
 
   <Card.Root>
     <Card.Header>
-      <Card.Title class="flex items-center gap-1.5 text-sm"><SparklesIcon class="size-4" /> Promoted skills</Card.Title>
-      <Card.Description class="text-xs">Procedures promoted from validated patterns.</Card.Description>
+      <Card.Title class="flex items-center gap-1.5 text-sm"
+        ><SparklesIcon class="size-4" /> Promoted skills</Card.Title
+      >
+      <Card.Description class="text-xs"
+        >Procedures promoted from validated patterns.</Card.Description
+      >
     </Card.Header>
     <Card.Content>
       {#if skills.length === 0}