chore: rebrand from Kon/Corbie to Magnotia

Replace all instances of the legacy product names "Kon" and "Corbie" with
"Magnotia" across user-facing copy, code identifiers, package names, bundle
ids, file paths, and documentation. Preserves the unrelated "konsole" (KDE
terminal) reference and the parent CORBEL company name.

- Renames 10 Rust crates (kon-* → magnotia-*) and the tauri binary
- Updates package.json, tauri.conf.json (productName + identifier)
- Renames CSS classes (kon-rh-* → magnotia-rh-*) and animations
- Renames brand and roadmap docs
- Regenerates Cargo.lock and package-lock.json

Verified: svelte-check passes; pure-rust crates compile under new names.

docs/brief/feature-set.md

@@ -1,18 +1,18 @@
-<!-- Source: Kon Master Brief — §4 Feature Set -->
+<!-- Source: Magnotia Master Brief — §4 Feature Set -->
 
 ## 4. Feature Set
 
 ### Core MVP (shipping with beta)
 - Local AI transcription (Whisper, on-device)
 - Auto-populating to-do lists from transcriptions
-- **Visual time representation.** Tasks displayed as visual blocks of time or countdowns, not just text lists. Traditional text-based to-do lists trigger overwhelm — visual timelines directly combat time blindness. This is the #1 community-requested feature and Tiimo's primary strength. Kon must match or exceed it from day one. Time should be externalised using visual countdown timers (e.g. shrinking colour disks, filling progress rings) rather than standard digital clocks — making the passage of time concrete and anchoring focus for users with time agnosia.
+- **Visual time representation.** Tasks displayed as visual blocks of time or countdowns, not just text lists. Traditional text-based to-do lists trigger overwhelm — visual timelines directly combat time blindness. This is the #1 community-requested feature and Tiimo's primary strength. Magnotia must match or exceed it from day one. Time should be externalised using visual countdown timers (e.g. shrinking colour disks, filling progress rings) rather than standard digital clocks — making the passage of time concrete and anchoring focus for users with time agnosia.
 - **WIP limits.** The main screen must mathematically restrict how many active tasks are visible at once. A "Now" column showing only 1–3 items maximum. Auto-generated task lists that dump 30 items onto a screen will instantly trigger the freeze response. The AI can prioritise; the UI must constrain.
 - History of past voice notes and transcriptions
 - Light/dark mode
 - Templates with local AI agent (contextual text under headings with associated metadata)
 - Vocabulary profiles (custom dictionaries for specialist terms — e.g. DND NPC/location names, technical jargon)
 - Transcription of uploaded voice notes and media files
-- **Open data format.** All transcripts and task lists stored locally in plain text, JSON, or Markdown. Essential for the privacy-first and PKM audience. Enables the Kon → Obsidian workflow promised in the distribution strategy. Users must be able to export, move, and own their data without vendor lock-in.
+- **Open data format.** All transcripts and task lists stored locally in plain text, JSON, or Markdown. Essential for the privacy-first and PKM audience. Enables the Magnotia → Obsidian workflow promised in the distribution strategy. Users must be able to export, move, and own their data without vendor lock-in.
 
 ### Post-MVP features (validated, designed, not yet prioritised)
 - **AI-powered micro-stepping with "just start" timer.** Decomposing abstract goals into hyper-specific actionable steps. The local AI agent must generate micro-steps that begin with highly specific, low-friction action verbs. Linguistic rules: every generated step must start with a concrete physical verb, target one single action, and be completable in under 5 minutes. Example: "Clean room" → "Pick up one shirt from the floor." NOT "Organise your bedroom" (still abstract, still paralysing). The goal is to bypass executive dysfunction by removing all ambiguity about what "starting" means. **Paired with a 2-minute or 5-minute "just start" focus timer.** Committing to a task for just five minutes bypasses internal resistance and builds micro-momentum — users frequently work past the timer. The timer should be a single tap from any micro-step, visually prominent, and use a shrinking colour disk or similar visual countdown (not a digital clock) to externalise the passage of time and combat time blindness.
@@ -25,5 +25,5 @@
 - **Read Page Aloud (text-to-speech).** A simple TTS function that reads transcriptions, task lists, or AI-generated micro-steps aloud. Engages auditory processing alongside visual, which improves retention and comprehension for ADHD users. Particularly valuable during the "Clarify" stage when reviewing a brain dump. Use OS-native TTS engines (available on all target platforms) to avoid additional dependencies. Should be a single-tap action from any text view.
 
 ### Parked / future consideration
-- **AI body doubling (low-fi implementation).** Research strongly validates the concept (rated #1 ADHD workplace strategy in 2025 ADDitude survey; 12-week study showed focus doubling, 30% anxiety reduction, £37 public value per £1 invested). Body doubling doesn't require high-fidelity interaction — simple ambient presence and shared monitoring work. A "low-fi" version could be a "Focus Room" interface showing abstract statuses ("AI is sorting your tasks…", "3 other Kon users are in deep work right now") to provide the feeling of parallel presence without complex engineering. This sidesteps the need for video, voice, or real-time communication. Potential future subscription feature. Not in MVP scope but worth prototyping early — the implementation cost is low relative to the validated demand.
+- **AI body doubling (low-fi implementation).** Research strongly validates the concept (rated #1 ADHD workplace strategy in 2025 ADDitude survey; 12-week study showed focus doubling, 30% anxiety reduction, £37 public value per £1 invested). Body doubling doesn't require high-fidelity interaction — simple ambient presence and shared monitoring work. A "low-fi" version could be a "Focus Room" interface showing abstract statuses ("AI is sorting your tasks…", "3 other Magnotia users are in deep work right now") to provide the feeling of parallel presence without complex engineering. This sidesteps the need for video, voice, or real-time communication. Potential future subscription feature. Not in MVP scope but worth prototyping early — the implementation cost is low relative to the validated demand.
 - Temptation bundling — cut (OS-level integration nightmare across platforms, essentially impossible on iOS). Replaced by energy-aware task sequencing (see post-MVP features).